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  • 1.
    Arumugam, Ashokan
    et al.
    Department of Community Medicine and Rehabilitation – Physiotherapy Section, Umeå University, Umeå, Sweden.
    Strong, Andrew
    Department of Community Medicine and Rehabilitation – Physiotherapy Section, Umeå University, Umeå, Sweden.
    Tengman, Eva
    Department of Community Medicine and Rehabilitation – Physiotherapy Section, Umeå University, Umeå, Sweden.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Häger, Charlotte K
    Department of Community Medicine and Rehabilitation – Physiotherapy Section, Umeå University, Umeå, Sweden.
    Psychometric properties of knee proprioception tests targeting healthy individuals and those with anterior cruciate ligament injury managed with or without reconstruction: a systematic review protocol2019In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 9, no 4, article id e02741Article in journal (Refereed)
    Abstract [en]

    An anterior cruciate ligament (ACL) injury affects knee proprioception and sensorimotor control and might contribute to an increased risk of a second ACL injury and secondary knee osteoarthritis. Therefore, there is a growing need for valid, reliable and responsive knee proprioception tests. No previous study has comprehensively reviewed all the relevant psychometric properties (PMPs) of these tests together. The aim of this review protocol is to narrate the steps involved in synthesising the evidence for the PMPs of specific knee proprioception tests among individuals with an ACL injury and knee-healthy controls.

  • 2. Björklund, Martin
    et al.
    Röijezon, Ulrik
    Häger-Ross, Charlotte
    Sandlund, Jonas
    Djupsjöbacka, Mats
    Bedömning och träning av sensomotoriska funktioner vid nackrehabilitering – varför och hur?2009In: Sjukgymnastdagarna 2009, 2009Conference paper (Other academic)
  • 3.
    Blomgren, Johannes
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Strandell, Erika
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Jull, Gwendolen
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation. Physiotherapy, School of Health and Rehabilitation Sciences, The University of Queensland, St Lucia, Brisbane, Australia.
    Vikman, Irene
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Effects of deep cervical flexor training on impaired physiological functions associated with chronic neck pain: a systematic review2018In: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 19, article id 415Article in journal (Refereed)
    Abstract [en]

    Background:Neck pain is a major health issue with high rates of recurrence. It presents with a variety ofaltered sensorimotor functions. Exercise is a cornerstone of rehabilitation and many training methods areused. Exercise is evaluated in most randomized controlled trials on its pain relieving effects. No review hasassessed the effect of exercise on the altered physiological functions or determined if there are differentialeffects of particular training methods. This review investigated the effects of deep cervical flexor (DCF)training, a training method commonly used for patients with neck pain, and compared it to other trainingmethodsornotrainingonoutcomesofcervicalneuromuscular function, muscle size, kinematics and kinetics.Methods:Web of Science, Scopus, CINAHL, PubMed were searched from inception until January 2018. Twelverandomized controlled trials were included that compared DCF training as sole intervention to other trainingor no interventions in persons with neck pain. The Cochrane Risk of Bias tool was used to assess the methodquality. All outcome measures were analysed descriptively and meta-analyses were performed for measuresevaluated in three or more studies.Results:DCF training was compared to cervical endurance, strength, proprioception and mobility training,muscle stretching, and no intervention control groups. Physiological outcome measures includedneuromuscular co-ordination (craniocervical flexion test), functional tasks, muscle fatigability, muscle size,kinematics (joint position sense, posture and range of motion) and kinetics (strength, endurance andcontraction accuracy). Strong evidence was found for effectiveness of DCF training on neuromuscularcoordination, but it had no or small effects on strength and endurance at higher loads. DCF trainingimproved head and cervical posture, while evidence was limited or contradictory for other measures.Conclusions:DCF training can successfully address impaired neuromuscular coordination, but not cervicalflexor strength and endurance at higher contraction intensities. A multimodal training regime is proposedwhen the aim is to specifically address various impaired physiological functions associated with neck pain

  • 4.
    Clark, Nicholas C.
    et al.
    School of Sport, Health, and Applied Sciences. St Mary's University, London.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Treleaven, Julia
    CCRE Spine, Division of Physiotherapy, SHRS, University of Queensland, Brisbane.
    Proprioception in Musculoskeletal Rehabilitation: Part 2: Clinical Assessment and Intervention2015In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 20, no 3, p. 378-387Article in journal (Refereed)
    Abstract [en]

    IntroductionProprioception can be impaired in gradual-onset musculoskeletal pain disorders and following trauma. Understanding of the role of proprioception in sensorimotor dysfunction and methods for assessment and interventions is of vital importance in musculoskeletal rehabilitation. In Part 1 of this two-part Masterclass we presented a theory-based overview of the role of proprioception in sensorimotor control, causes and findings of altered proprioception in musculoskeletal conditions, and general principles of assessment and interventions.PurposeThe aim of this second part is to present specific methods for clinical assessment and interventions to improve proprioception in the spine and extremities.ImplicationsClinical assessment of proprioception can be performed using goniometers, inclinometers, laser-pointers, and pressure sensors. Manual therapy, taping, and bracing can immediately enhance proprioception and should be used to prepare for exercise interventions. Various types of exercise (active joint repositioning, force sense, co-ordination, muscle performance, balance/unstable surface, plyometric, and vibration training) should be employed for long-term enhancement of proprioception.

  • 5. Djupsjöbacka, Mats
    et al.
    Röijezon, Ulrik
    Häger-Ross, Charlotte
    Martin, Björklund
    Sensomotorisk funktion hos personer med nackbesvär2010In: Fysioterapi, ISSN 1653-5804, no 6-7, p. 38-45Article in journal (Other academic)
  • 6.
    Jafari, Hedyeh
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Pauelsen, Mascha
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Nyberg, Lars
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Nikolakopoulos, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Gustafsson, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    On Internal Modeling of the Upright Postural Control in Elderly2018Conference paper (Refereed)
  • 7.
    Johansson, Sara
    et al.
    Department of Health Sciences, Luleå University of Technology.
    Rissén, Dag
    Centre for Research & Development, Uppsala University/Region of Gävleborg, Gävle, Sweden.
    Fjellman-Wiklund, Annchristine
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University.
    Paarup, Helene M.
    Research Unit for Occupational & Environmental Medicine, Clinical Institute, University of Southern Denmark.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Musculoskeletal pain, work posture and physical activity among professional symphony and opera musicians in Sweden2015In: Musician's Health and Performance. 2nd Conference (MHPC2015): Book of Abstracts, Odense, 2015, article id 45Conference paper (Refereed)
  • 8.
    Johansson Strandkvist, Viktor
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Nyberg, Lars
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Stridsman, Caroline
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Lindberg, Anne
    OLIN studierna Norrbottens läns landsting , Sverige.
    Project: Physical function and postural control among subjects with Chronic Obstructive Pulmonary Disease – epidemiological and laboratory studies2016Other (Other (popular science, discussion, etc.))
  • 9.
    Juul-Kristensen, Birgit
    et al.
    Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark and Institute of Occupational Therapy, Physiotherapy and Radiography, Bergen University College, Bergen, Norway,.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Hypermobility among musicians - advantage or disadvantage?2013In: Musicians' Health and Performance 1st Nordic Conference 2013, Luleå: Luleå University of Technology, Department of Health Sciences , 2013, p. 18-19Conference paper (Refereed)
    Abstract [en]

    Generalised Joint Hypermobility (GJH) is a condition frequent seen in several hereditary diseases of connective disorders. It is defined from the maximal range of motion, often by the Beighton score, representing the laxity of the involved ligaments. GJH is a genetic feature, but also susceptible to training. GJH in adults is, when present with symptoms, characterised by functional limitations (1), decreased muscle strength, stability, proprioception, and an altered gait and muscle activity pattern.There are no precise prevalence rates of adults with Generalised Joint Hypermobility (GJH), but a recent review reports a varying prevalence for adults from 2-57% depending on age, gender and ethnic origin. For children the prevalence varies from 7-36%, primarily depending on the tests and criteria (especially the cut off-points) used for diagnosing GJH. GJH is more frequent in females/ girls than males/boys (2).Several studies found GJH to be frequent among performing artists, such as ballet dancers, gymnasts, and even musicians (3) and hypothesized an association between GJH and development of musculoskeletal disorders. As an example, professional dancers have higher physical fitness (walking distance, muscle strength, estimated VO2-max) than a matched control group, but for those with GJH, this advantage was not present.In a study of musicians a clear association was found between forearm and hand pain and GJH in 35% of female and 17% of male musicians (3), and also an increased prevalence of knee and spine symptoms in musicians with GJH (4). It has been suggested, that when playing music GJH is even an advantage, especially for joints that move quickly (wrists, elbows), but a disadvantage for joints that should stabilise (knees, back). However, one study did not find such association between symptoms and GJH in pianists.In summary, there seems to be some association between musculoskeletal injuries and GJH, presumably also in musicians, although the studies of this group are few. Therefore, larger epidemiological studies are necessary to confirm an association between GJH and musculoskeletal disorders in musicians, and whether specific precautions or preventive strategies should be taken for this group.References1. Juul-Kristensen B, Hansen H, Simonsen EB, Alkjaer T, Kristensen JH, Jensen BR, et al. Knee function in 10-year-old children and adults with Generalised Joint Hypermobility. The Knee. 2012;19:773-8.2. Remvig L, Jensen DV, Ward RC. Epidemiology of general joint hypermobility and basis for the proposed criteria for benign joint hypermobility syndrome: review of the literature. J Rheumatol. 2007;34(4):804-9.3. Brandfonbrener AG. Joint laxity and arm pain in a large clinical sample of musicians. Med Probl Perform Art. 2002;17(september):113-5.4. Larsson LG, Baum J, Mudholkar GS, Kollia GD. Benefits and disadvantages of joint hypermobility among musicians. NEnglJ Med. 1993;329(15):1079-82.

  • 10.
    Karvelis, Petros
    et al.
    Laboratory of Knowledge and Intelligent Computing, Department of Computer Engineering, Technological Educational Institute of Epirus.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Faleij, Ragnar
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Georgoulas, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Mansouri, Sina Sharif
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Nikolakopoulos, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    A Laser Dot Tracking Method for the Assessment of Sensorimotor Function of the Hand2017In: 2017 25th Mediterranean Conference on Control and Automation, MED 2017, Piscataway. NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 217-222, article id 7984121Conference paper (Refereed)
    Abstract [en]

    Assessment of sensorimotor function is crucial during the rehabilitation process of various physical disorders, including impairments of the hand. While moment performance can be accurately assessed in movement science laboratories involving highly specialized personnel and facilities there is a lack of feasible objective methods for the general clinic. This paper describes a novel approach to sensorimotor assessment using an intuitive test and a specifically tailored image processing pipeline for the quantification of the test. More specifically the test relies on the patient being instructed on following a zig-zag pattern using a handled laser pointer. The movement of the pointer is tracked using image processing algorithm capable of automating the whole procedure. The method has potential for feasible objective clinical assessment of the hand and other body parts

  • 11.
    Larsson, Agneta
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Olsson, Ing-Mari
    Artist- och musikerhälsan i Malmö.
    Engquist, Karin
    Artist- och musikerhälsan i Malmö.
    Gard, Gunvor
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    A web-based health promotion intervention for music students in Sweden2015In: Musician's Health and Performance. 2nd Conference (MHPC2015): Book of abstracts, 2015Conference paper (Refereed)
    Abstract [en]

    Aim: In this presentation a study protocol for a web-based health promotion intervention for music students, and the rationale behind it, will be described. The aim is to develop a new dynamic web-portal with an interactive multimodal health intervention program for musicians and music students, and perform a controlled feasibility and effect study among music students.Methods: A web-based competence development and coaching program for music students in Sweden will be developed and performed according to a cognitive approach with focus on the students own goals. The program will include knowledge concerning how to promote cognitive and emotional coping in performance situations; ergonomically sound playing postures; as well as how to prevent bodily symptoms, mental distress and hearing disorders. Participants will be music students from two regions in Sweden, Skåne and Norrbotten. The intervention group will have access to the web-based program together with web-based group coaching, while the control group will receive general web-based information. The intervention will continue for 6 month and outcome measures will be collected before, after intervention and after 12 months to evaluate the feasibility and health effects of the intervention. Expected outcomes: It is reasonable to believe that an increased awareness of healthy and balanced positions while playing, systematic use of pauses and variation during rehearsal, stress management skills and a sound attitude towards control of e.g. playing related fatigue and pain can improve the music students’ prerequisites for a healthy and sustainable working life. Discussion/Conclusion: This project will contribute with knowledge about feasibility and effects of e-health solutions specifically designed for music students and musicians. Feasible and efficient e-health solutions for musicians and other performing artists can have major impact for these professions in Sweden due to the large distances and the scarceness of specialized occupational health care providers within performing arts medicine.Acknowledgement: This research is supported by the Areas of excellence in research and innovation at Luleå university of technology - Innovative art and science, who have granted funding for project initiation.

  • 12.
    Linder, Martin
    et al.
    Ystad Rehab Center.
    Michaelson, Peter
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Laterality judgments in people with low back pain-a cross-sectional observational and test-retest reliability study2016In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 21, p. 128-133Article in journal (Refereed)
    Abstract [en]

    BackgroundDisruption of cortical representation, or body schema, has been indicated as a factor in the persistence and recurrence of LBP. This has been observed through impaired laterality judgment ability and it has been suggested that this ability is affected in a spatial rather than anatomical manner.ObjectivesWe compared laterality judgment performance of foot and trunk movements between people with LBP with or without leg pain and healthy controls, and investigated associations between test performance and pain. We also assessed the test-retest reliability of the Recognise OnlineTM software when used in a clinical and a home setting.DesignCross-sectional observational and test-retest study.MethodsThirty individuals with LBP and 30 healthy controls performed judgment tests of foot and trunk laterality once supervised in a clinic and twice at home.ResultsNo statistically significant group differences were found. LBP intensity was negatively related to trunk laterality accuracy (p=0.019). Intraclass correlation values ranged from 0.51-0.91. Reaction time improved significantly between test occasions while accuracy did not.ConclusionsLaterality judgments were not impaired in subjects with LBP compared to controls. Further research may clarify the relationship between pain mechanisms in LBP and laterality judgment ability. Reliability values were mostly acceptable, with wide and low confidence intervals, suggesting test retest reliability for Recognise OnlineTM could be questioned in this trial. A significant learning effect was observed which should be considered in clinical and research application of the test.

  • 13.
    Mamikoglu, Umut
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Andrikopoulos, Georgios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Nikolakopoulos, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Pauelsen, Mascha
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Gustafsson, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Electromyography Based Joint Angle Estimation and Control of a Robotic Leg2016In: 6th IEEE RAS and EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob 2016): June 26-29, Singapore, 2016, Piscataway, NJ: IEEE Communications Society, 2016, p. 182-187, article id 7523619Conference paper (Refereed)
    Abstract [en]

    Musculoskeletal modeling based on Electromyography (EMG) has many applications in physiotherapy and biologically-inspired robotics. In this article, a novel methodology for the modeling of the dynamics of an antagonistic muscle pair that actuates the human ankle joint movements will be established. As it will be presented, the musculoskeletal model is based on a multi input single output (MISO) auto-regressive integrated moving average with exogenous input (ARIMAX) model, which takes the integrated EMG measurements as input and estimates the corresponding joint angles. Based on this methodology, a Pneumatic Artificial Muscle (PAM) robotic leg setup that mimics the flexion/extension movement of human ankle joint is controlled to replicate the human movement. The experimental results demonstrate the performance of EMG based joint angle estimation and control of the robotic leg with the proposed model.

  • 14.
    Mamikoglu, Umut
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Nikolakopoulos, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Pauelsen, Mascha
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Varagnolo, Damiano
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Gustafsson, Thomas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Elbow Joint Angle Estimation by Using Integrated Surface Electromyography2016In: 24th Mediterranean Conference on Control and Automation (MED): June 21-24, Athens, Greece, 2016, Piscataway, NJ: IEEE Communications Society, 2016, p. 785-790, article id 7535891Conference paper (Refereed)
    Abstract [en]

    Electromyography (EMG) signals represent the electrical activation of skeletal muscles and contain valuable information about muscular activity. Estimation of the joint movements by using surface EMG signals has great importance as a bio-inspired approach for the control of robotic limbs and prosthetics. However interpreting surface EMG measurements is challenging due to the nonlinearity and user dependency of the muscle dynamics. Hence it requires complex computational methods to map the EMG signals and corresponding limb motions. To solve this challenge we here propose to use an integrated EMG signal to identify the EMG-joint angle relation instead of using common EMG processing techniques. Then we estimate the joint angles for elbow flexion-extension movement by using an auto-regressive integrated moving average with exogenous input (ARIMAX) model, which takes integrated EMG measurements as input. The experiments showed that the suggested approach results in a 21.85% average increase in the estimation performance of the elbow joint angle compared to the standard EMG processing and identification.

  • 15.
    Pauelsen, Mascha
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Nyberg, Lars
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Vikman, Irene
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Both psychological factors and physical performance are associated with fall-related concerns2018In: Aging Clinical and Experimental Research, ISSN 1594-0667, E-ISSN 1720-8319, Vol. 30, no 9, p. 1079-1085Article in journal (Refereed)
    Abstract [en]

    Background Fall-related concern strongly correlates to activity avoidance in older people.  In this complex phenomenon, different terminology and instruments are often used interchangeably. Three main concepts make up fall-related concerns: fear-of-falling, consequence concern, and falls self-efficacy. It is suggested that fall-related concerns are mediated by psychological and physical factors.

    Aims Our aims were to describe the prevalence of fall-related concerns and find explanatory factors for its most studied concept – falls self-efficacy – in an older population.

    Methods We executed a cross sectional study on a random sample of 153 community dwelling older people (70 years or older). We used validated and reliable instruments as well as structured interviews to gather data on the three concepts of fall-related concerns and possible mediating factors. We then calculated descriptive statistics on prevalence and regression models for the total group, and men and women separately.

    Results 70% of the total sample (80% of women and 53% of men) reported at least one of the three concepts of fall-related concern. For the total sample, fear-of-falling, morale and physical performance were associated factors with falls self-efficacy. For women, number of prescription medications was added. For men, physical performance and concerns for injury were associated.

    Conclusion Fall-related concern is prevalent in large proportions with higher prevalence for women than for men. Important factors are fear of falling, morale, and physical performance. Gender differences in the emergence and variance of fall-related concern and the relation between physical performance and fall-related concern should be targeted in future research endeavors. 

  • 16. Pauelsen, Mascha
    et al.
    Nyberg, Lars
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Vikman, Irene
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Fear, morale, and physical performance, not past falls, mediate fallsefficacy in community dwelling older people2017In: WCPT 2017 congress proceedings, 2017Conference paper (Refereed)
    Abstract [en]

    Background: Fallrelatedconcerns have a large impact on wellbeing,balance performance and future falls. Theprimary focus in fallrelatedconcern research has generally been related to physical factors andprevious falls. This is mirrored by the use of the traditional fear avoidance model for falls in clinicalsettings, in which actual falls play a pivotal part in creating and perpetuating the cycle of fear activityavoidance fallsfear.Many researchers and clinicians, however, have started toacknowledge that more factors play a part in this complex issue.

    Purpose: We aimed at investigating fallsefficacyin relation to several psychological, demographic andphysical factors in an effort to discover a more fitting model for explaining fallrelatedconcern.

    Methods: We have visited a random population sample of 115 people, aged 70 or more and living in amunicipality in Northern Sweden. The participants were assessed for falls efficacy by means of theFalls Efficacy Scale International(FESI).We also collected data on selected potential covariatessuch as fear of falling, fall consequence concerns, falls history, physical performance, activity,cognitive performance, morale, medication and selected demographics. We then used multipleregression analyses in order to model covariate associations to prevalence and degree of fallrelatedconcern.

    Results: The analyses show the following: The sample presents a median FESIscore of 21, and 36 % (CI.95limits: 27 %; 44 %) score 22 or higher, indicating poor fallrelatedefficacy. Further, 39% (CI.95 limits:30 %; 48 %) express some degree of fear of falling while 54 % (CI.95 limits: 45 %; 63 %) areconcerned about sustaining injuries from a fall (consequence concern). The correlation betweenfear of falling and falls efficacy seems weak (r = .55), indicating related but separate phenomena.Moreover, data indicate no significant associations between previous falls and falls efficacy, fear offalling, or consequence concern. On the other hand, FESIscores seem to be explained to a degreeof 48 % by the three variables physical performance, fear of falling, and morale (as measured by thePhiladelphia Geriatric Centre Morale scale).

    Conclusion(s): These findings may contribute to a better understanding of fallrelatedconcerns. Perhaps fear,morale, and physical ability are stronger mediators than actual falls experience in itself. If so, thiswould call for the development of a new model which more adequately describes how fallrelatedconcerns are mediated while excluding falls as a cause.

    Implications: The clinical implications of this model would mean a shift to include more psychosocial aspects toreduce fallrelatedconcern and risk of falling. An approach directed more towards morale, as well asincreasing efficacy and improving physical performance.

  • 17.
    Pauelsen, Mascha
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Vikman, Irene
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Johansson, Viktor
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Larsson, Agneta
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Decline in sensorimotor systems explains reduced falls self-efficacy2018In: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 42, p. 104-110Article in journal (Refereed)
    Abstract [en]

    Physical performance including balance tasks is one of the main factors explaining the variance in falls self-efficacy in older adults. Balance performance is often measured by use of gross assessment scales, which assess the result of integration of all systems involved in postural control. We aimed to investigate which measurements of postural control correlate to falls self-efficacy scores as measured by the FES-I instrument, and which sensory and motor systems best explain them. A cross sectional study was designed, in which 45 older adults performed quiet stance and limits of stability trials during which their center of pressure (CoP) excursion was recorded. Falls self-efficacy was measured using the Falls Efficacy Scale - International. Eyesight, vestibular function, proprioception, reaction time and strength were also measured. Hierarchical orthogonal projection of latent structures was used to model FES-I with the CoP trials and then with the sensory and muscle function data. Fes-I could be explained to 39%, with the eyes open trials and the limits of stability trials loading the heaviest. The base model could be explained to 40% using the sensory and muscle function data, with lower limb strength, leg proprioception, neck proprioception, reaction time and eyesight loading the heaviest.

  • 18. Richter, H.O.
    et al.
    Röijezon, Ulrik
    Björklund, Martin
    Djupsjöbacka, Mats
    Long-term adaptation to neck/shoulder pain and perceptual performance in a hand laterality motor imagery test2010In: Perception, ISSN 0301-0066, E-ISSN 1468-4233, Vol. 39, no 1, p. 119-130Article in journal (Refereed)
  • 19.
    Rissén, Dag
    et al.
    Centre for Research & Development, Uppsala University/Region of Gävleborg, Gävle, Sweden.
    Fjellman-Wiklund, Annchristine
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Prevalence, intensity, and playing related consequences of musculoskeletal pain, and associations with mood among professional orchestra musicians – a pilot study2015In: Musician's Health and Performance. 2nd Conference (MHPC2015): Book of Abstracts, Odense, 2015, article id 12Conference paper (Refereed)
    Abstract [en]

    Prevalence, intensity, and playing related consequences of musculoskeletal pain, and associations with mood among professional orchestra musicians – a pilot study

  • 20.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Aktivitet: Human Health and Performance Lab: Movement Science2012Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Ansvarig för uppbyggnad, utveckling och labverksamhet vid rörelselabbet vid Institutionen för Hälsovetenskap vid LTU, Luleå.

  • 21.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Aktivitet: Kulturell inspiration: Musik, film, noveller, poesi1970Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Musik: Steely Dan, Movits, Bo Kaspers, Stones, Dylan, Thievery Coorporation, Bugge Wesseltoft... Film: Quentin Tarantino: Pulp fiction, Django unchanged, Dansk film & tv, etc... Noveller: Paulo Coelho, Franz Kafka, William S Bouroghs... Poesi: Bruno K Öijer, Karin Boije...

  • 22.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Aktivitet: Musicians' Health & Performance2015Other (Other (popular science, discussion, etc.))
  • 23.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Aktivitet: Musicians´Health & Performance2013Other (Other (popular science, discussion, etc.))
  • 24.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Assessment and exercise of sensorimotor function in neck pain disorders2011In: Journal of Rehabilitation Medicine, ISSN 1650-1977, E-ISSN 1651-2081, Vol. 43, no Suppl 50Article in journal (Other academic)
    Abstract [en]

    Recent research on sensorimotor function has contributed essentially to the understanding of possible pathophysiological mechanisms, associations between pain and altered motor control and to the development of assessment and rehabilitation methods of musculoskeletal pain disorders. The sensory and motor functions of the cervical spine are fundamental for the stability and movement control of the head, for the arm and hand function, as well as for the postural control. Thus, sensorimotor deficiencies in neck pain disorders may have important impact not only regarding symptoms but also on physical functioning in daily living and work life. Pathophysiological models explaining the associations between pain and altered sensorimotor function include, e.g., disturbed proprioceptive information due to altered sensitivity of muscle spindle afferents, and altered muscle activation patterns due to pain adaptations. According to these models, sensorimotor deficiencies may be of immense importance for the recurrence, persistence and spread of musculoskeletal pain disorders. Assessments of sensorimotor function in neck pain disorders have revealed deficiencies including, e.g., reduced range of motion and movement speed of cervical movements; reduced acuity in movements of the neck, shoulder and elbow; and reduced muscle strength, as well as altered activation synergies of the deep and superficial cervical muscles. Disturbances have also been identified for occulomotor function and postural control, especially in neck pain related to trauma and cervicogenic dizziness. For references see, e.g. (1). In line with the above, specific exercise regimes designed to improve sensorimotor function, such as neck coordination and proprioception exercises, have shown promising results in reducing pain and improving motor functions, e.g., (2). A common characteristic of these exercises is that they involve slow movements and closed skills tasks (i.e., the task is highly predictable). According to the literature on motor learning, exercises involving more open skills tasks can be useful for training sensorimotor function. Therefore, new methods have been developed which involve less predictable exercises and thereby increase the demand for on-line adjustments of the neuromuscular control system (3, 4). Taken together, these theoretical and empirical premises support the value of assessment and exercise of sensorimotor function in the rehabilitation of neck pain disorders. Further research is, however, warranted, e.g., regarding the neuromuscular mechanisms involved in various types of exercises; the predictive ability of the efficiency of interventions for a specific individual; and RCT-studies including long-term follow-up. References1. Röijezon U. Sensorimotor function in chronic neck pain: Objective assessmentsand a novel method for neck coordination exercise [PhD-thesis]:Umeå University, ISSN 0346-6612; ISBN: 978-91-7264-809-8; 2009.2. Jull G, Falla D, Treleaven J, Hodges P, Vicenzino B. Retraining cervicaljoint position sense: The effect of two exercise regimes. J Orthop Res2007 Mar; 25: 404–412.3. Kristjansson E, Oddsdottir GL. “The Fly”: A new clinical assessment andtreatment method for deficits of movement control in the cervical spinereliability and validity. Spine 2010; 35: E1298–E305.4. Röijezon U, Björklund M, Bergenheim M, Djupsjöbacka M. A novelmethod for neck coordination exercise--a pilot study on persons withchronic non-specific neck pain. J Neuroeng Rehabil 2008; 5: 36.

  • 25.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Motorisk inlärning2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 127-139Chapter in book (Other academic)
    Abstract [sv]

    Träning av motorisk kontroll vid rehabilitering av smärttillstånd inkluderar bland annat övningar för proprioception, neuromuskulär koordination, stabilitet, balans, hållning och koordinerade rörelsemönster. Målet med träningen är att förmågan att utföra färdigheten ska kvarstå över tid och omsättas i praktiken vid olika aktiviteter i patientens vardagliga liv, till exempel vid lyft, datorarbete, musicerande eller idrottande. Träning av motorisk kontroll involverar med andra ord inlärning av motoriska färdigheter. För att träningen ska bli så effektiv som möjligt är det en god idé att ta del av kunskap som presenterats inom forskningsområdet för motorisk inlärning. I detta kapitel presenteras metoder och teorier kring motorisk inlärning med tillämpning vid prevention och rehabilitering av muskuloskeletala besvär. De är applicerbara på alla typer av inlärning av nya färdigheter eller korrigering av utförande av tidigare färdigheter, liksom på träning som syftar till att öka till exempel styrka, uthållighet eller rörlighet för ökad effektivitet och minskad skaderisk.

  • 26.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering2019Collection (editor) (Other academic)
    Abstract [sv]

    Boken ger en aktuell kunskapsöversikt över fysiologiska system och mekanismer som är involverade i motorisk kontroll och motorisk inlärning, samt ger en beskrivning av kliniska metoder för undersökning och behandling.

    Boken är uppdelad i tre delar:

    • Del 1 omfattar generella teoretiska kunskaper inom bland annat muskel- och neurofysiologi, sensomotorisk kontroll, patofysiologi och motorisk inlärning.
    • Del 2 beskriver övergripande olika koncept och system för undersökning och träning av motorisk kontroll.
    • Del 3 har en mer specifik inriktning med presentation av sensomotoriska funktionsstörningar och metoder för undersökning och träning för varje separat kroppsdel, från nacke till fot. Denna del avslutas med ett kapitel om hypermobilitet.

    Motorisk kontroll och inlärning är författad av en mycket framstående grupp svenska och internationella forskare och kliniker som generöst bidrar med sin expertkompetens till bokens olika kapitel.

    Boken vänder sig till personer som utbildar sig eller är verksamma inom prevention och rehabilitering av muskuloskeletala besvärstillstånd, såsom fysioterapeuter, arbetsterapeuter, läkare, kiropraktorer, osteopater och naprapater, men även andra som arbetar med rörelsebeteende och inlärning, till exempel idrottslärare och idrottstränare.

  • 27.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Patofysiologiska modeller: samband mellan smärta och störningar i motorisk kontroll2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 117-126Chapter in book (Other academic)
    Abstract [sv]

    En mängd olika störningar i sensoriska och motoriska funktioner har beskrivits vid smärttillstånd i rörelseapparaten. Bland annat störd proprioception, neuromuskulär koordination och balans samt förändrade hållnings- och rörelsemönster. Utifrån empiriska studier på personer med muskuloskeletala besvär och experimentella studier på såväl människor som djur har flera olika teoretiska modeller utvecklats för att beskriva de fysiologiska mekanismerna bakom sambanden mellan smärta och störningar i motoriska kontrollfunktioner. Några av de mest uppmärksammade modellerna presenteras i detta kapitel. Dessa modeller skiljer sig åt i vissa avseenden, men inte i alla. I huvudsak kompletterar de dock varandra och ger värdefulla förklaringar till möjliga mekanismer bakom uppkomst, återkomst och långvarighet av muskuloskeletala besvär, och dess samband med förändringar i motoriska kontrollfunktioner.

  • 28.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Projekt: Hälsa och prestation vid Musicerande2012Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Projektet involverar studier av muskuloskeletala besvär och påverkan på rörelsekontroll hos musiker. Finansiering sker bland annat via Post Doc anslag från Forskningsrådet för Arbetsliv och Socialvetenskap (FAS).

  • 29.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Proprioception vid idrott, prevention och rehabilitering2016In: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 2016, no 2, p. 8-9Article in journal (Other academic)
    Abstract [sv]

    Proprioception är viktig för god sensomotorisk kontroll och därmed för flertalet olika idrotter. Forskningsstudier har rapporterat att idrottare, i jämförelse med icke-idrottare, har god proprioception. Detta kan, åtminstone delvis, bero på utövandet av idrott. Nedsatt proprioception kan öka risken för skador, medan muskuloskeletala besvär per se kan bidra till nedsatt proprioception. Träning av proprioception är därför relevant både för att förbättra idrottsprestation och för prevention och rehabilitering av idrottsskador.

  • 30. Röijezon, Ulrik
    Sensorimotor function in chronic neck pain: Objective assessments and a novel method for neck coordination exercise2009Doctoral thesis, comprehensive summary (Other academic)
  • 31. Röijezon, Ulrik
    Sensorimotorisk funktion vid kroniska nackbesvär: Objektiva undersökningar och en nyutvecklad metod för nackkoordinationsträning2010Conference paper (Other academic)
  • 32.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Specialistkompetens inom artist- och musikerhälsa: Vem bryr sig?2013In: Fysioterapi, ISSN 1653-5804, no 9, p. 45-Article in journal (Other (popular science, discussion, etc.))
  • 33.
    Röijezon, Ulrik
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Undersökning och träning av proprioception vid rehabilitering av muskuloskeletala besvär2016In: BestPractice, ISSN 1902-7583, Vol. 8, no 26, p. 23-25Article in journal (Other academic)
    Abstract [sv]

    Proprioceptionen är viktig för god sensomotorisk kontroll, och den kan bli störd vid muskuloskeletala besvärstillstånd av såväl traumatisk som icke-traumatiskt ursprung, men även av uttröttning respektive immobilisering. Undersökning och träning av proprioception har därför betydelse vid såväl prevention som rehabilitering av muskuloskeletala besvär. Kliniska metoder har utvecklats för undersökning och träning med till exempel laserpekare och dynamometrar, men den tekniska utvecklingen med sensorer i smarta mobiltelefoner och tv-spel skapar nya möjligheter för användarvänliga och billiga undersöknings- och träningsmetoder.

  • 34.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Ardel, Dag
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University.
    Rissén, Dag
    Centre for Research & Development, Uppsala University/Region of Gävleborg, Gävle, Sweden.
    Fjellman-Wiklund, Annchristine
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University.
    Juul-Kristensen, Birgit
    Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark and Institute of Occupational Therapy, Physiotherapy and Radiography, Bergen University College, Bergen, Norway,.
    Generalised Joint Hypermobility and musculoskeletal pain among professional classical orchestra musicians in Sweden: a pilot study2015In: Musician's Health and Performance. 2nd Conference (MHPC2015): Book of Abstracts, Odense, 2015, article id 49Conference paper (Refereed)
  • 35.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Bexander, Catharina
    Koordination av öga, huvud och hand2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, p. 79-90Chapter in book (Other academic)
    Abstract [sv]

    Vid manuella uppgifter som att äta, laga mat, snickra, spela bordtennis eller sätta en nyckel i ett lås är det synen som vägleder handens rörelse. För att kunna tolka synintrycken korrekt måste kroppen känna till huvudets position och rörelse, dels i rummet och dels i förhållande till bålen. Dessutom måste denna information samordnas med information om handens och armens position och rörelse i förhållande till bålen. Motoriska kommandon för såväl ögon, huvud, arm och hand måste koordineras så att rörelserna utförs med stor precision. Detta involverar en mängd sensoriska och motoriska omkopplingar och kontrollprocesser och inkluderar såväl reflexer som viljemässiga rörelser. I detta kapitel beskrivs samordningen av öga–nacke och öga–huvud–handrörelser. Dessutom ges några exempel på hur smärttillstånd kan störa denna koordination.

  • 36. Röijezon, Ulrik
    et al.
    Björklund, Martin
    Bergenheim, Mikael
    Djupsjöbacka, Mats
    A novel method for neck coordination exercise: a pilot study on persons with chronic non-specific neck pain2008In: Journal of NeuroEngineering and Rehabilitation, ISSN 1743-0003, E-ISSN 1743-0003, Vol. 5, no 36Article in journal (Refereed)
  • 37. Röijezon, Ulrik
    et al.
    Björklund, Martin
    Djupsjöbacka, Mats
    A novel method for neck coordination exercise – a pilot study on persons with chronic non-specific neck pain2008In: XVIIth Congress of the International Society of Electrophysiology and Kinesiology, 2008Conference paper (Refereed)
  • 38. Röijezon, Ulrik
    et al.
    Björklund, Martin
    Djupsjöbacka, Mats
    A novel method of neck coordination exercise – effects on sensorimotor functions and self reported health and functioning2007In: 15th International WCPT Congress, World Physical Therapy, 2007Conference paper (Refereed)
  • 39.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Björklund, Martin
    University of Gävle, Centre of Musculoskeletal Research.
    Djupsjöbacka, Mats
    University of Gävle, Centre of Musculoskeletal Research.
    The slow and fast components of postural sway in chronic neck pain2011In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 16, no 3, p. 273-278Article in journal (Refereed)
    Abstract [en]

    Background: Several studies have reported altered postural control in people with neck pain. The aim of this study was to increase the understanding of the nature of altered postural control in neck pain by studying the slow and fast components of body sway. Methods: Subjects with whiplash associated disorders (WAD, n = 21) and chronic non-specific neck pain (NS, n = 24) were compared to healthy controls (CON, n = 21) in this cross-sectional study. The magnitudes of the slow and fast sway components were assessed in Rhomberg quiet stance for 30 s on a force plate with eyes closed. We also investigated associations between postural sway and symptoms, self-ratings of functioning and kinesiophobia. Results: Increased magnitude of the slow sway component was found in WAD, but not in NS. Greater magnitude of the slow component in WAD was associated with poorer physical functioning, including balance disturbances, and more severe sensory symptoms. Conclusions: Increased magnitude of the slow sway component implies an aberration in sensory feedback or processing of sensory information in WAD. The associations between postural sway and self-rated characteristics support the clinical validity of the test. Further investigation into NS, involving a longer test time is warranted

  • 40.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Brorsson, Sofia
    Johansson, Anna-Maria
    Handens sensomotoriska funktion2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 91-106Chapter in book (Other academic)
    Abstract [sv]

    Handen med alla dess mångfasetterade funktioner har central betydelse för människors vardagsaktiviteter, både i hemmet, i yrkesarbetet och på fritiden. Genom sin unika konstruktion, med bland annat opposition av tummen mot övriga fingrar möjliggörs ett flertal olika grepp och ändamålsenlig manipulation. Handen är även viktig för vår uppfattning om vår omvärld samt för vårt kroppsspråk och vår kommunikation. Handens särställning vad gäller såväl sensorisk som motorisk funktion exemplifieras av den relativt sett stora representation som handen har i såväl sensoriska som motoriska kortex. I detta kapitel presenteras handens funktionella anatomi och sensomotoriska funktioner.

  • 41.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Clark, Nicholas C.
    School of Sport, Health, and Applied Sciences. St Mary's University, London.
    Treleaven, Julia
    CCRE Spine, Division of Physiotherapy, SHRS, University of Queensland, Brisbane.
    Proprioception in Musculoskeletal Rehabilitation: Part 1: Basic Science and Principles of Assessment and Clinical Interventions2015In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 20, no 3, p. 368-377Article in journal (Refereed)
    Abstract [en]

    IntroductionImpaired proprioception has been reported as a feature in a number of musculoskeletal disorders of various body parts, from the cervical spine to the ankle. Proprioception deficits can occur as a result of traumatic damage, e.g., to ligaments and muscles, but can also occur in association with painful disorders of a gradual-onset nature. Muscle fatigue can also adversely affect proprioception and this has implications for both symptomatic and asymptomatic individuals. Due to the importance of proprioception for sensorimotor control, specific methods for assessment and training of proprioception have been developed for both the spine and the extremities.PurposeThe aim of this first part of a two part series on proprioception in musculoskeletal rehabilitation is to present a theory based overview of the role of proprioception in sensorimotor control, assessment, causes and findings of altered proprioception in musculoskeletal disorders and general principles of interventions targeting proprioception.ImplicationsAn understanding of the basic science of proprioception, consequences of disturbances and theories behind assessment and interventions is vital for the clinical management of musculoskeletal disorders. Part one of this series supplies a theoretical base for part two which is more practically and clinically orientated, covering specific examples of methods for clinical assessment and interventions to improve proprioception in the spine and the extremities.

  • 42. Röijezon, Ulrik
    et al.
    Djupsjöbacka, Mats
    Björklund, Martin
    Häger-Ross, Charlotte
    Grip, Helena
    Liebermann, Dario G
    Kinematics of fast cervical rotations in persons with chronic neck pain: a cross-sectional and reliability study2010In: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 11, no 222Article in journal (Refereed)
  • 43.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Faleij, Ragnar
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Kravelis, Petros S.
    Laboratory of Knowledge and Intelligent Computing, Department of Computer Engineering, Technological Educational Institute of Epirus, Arta.
    Georgoulas, Georgios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Nikolakopoulos, George
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    A new clinical test for sensorimotor function of the hand: development and preliminary validation2017In: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 18, no 1, article id 407Article in journal (Refereed)
    Abstract [en]

    Background

    Sensorimotor disturbances of the hand such as altered neuromuscular control and reduced proprioception have been reported for various musculoskeletal disorders. This can have major impact on daily activities such as dressing, cooking and manual work, especially when involving high demands on precision and therefore needs to be considered in the assessment and rehabilitation of hand disorders. There is however a lack of feasible and accurate objective methods for the assessment of movement behavior, including proprioception tests, of the hand in the clinic today. The objective of this observational cross- sectional study was to develop and conduct preliminary validation testing of a new method for clinical assessment of movement sense of the wrist using a laser pointer and an automatic scoring system of test results.

    Methods

    Fifty physiotherapists performed a tracking task with a hand-held laser pointer by following a zig-zag pattern as accurately as possible. The task was performed with left and right hand in both left and right directions, with three trials for each hand movement. Each trial was video recorded and analysed with a specifically tailored image processing pipeline for automatic quantification of the test. The main outcome variable was Acuity, calculated as the percent of the time the laser dot was on the target line during the trial.

    Results

    The results showed a significantly better Acuity for the dominant compared to non-dominant hand. Participants with right hand pain within the last 12 months had a significantly reduced acuity (p < 0.05), and although not significant there was also a similar trend for reduced Acuity also for participants with left hand pain. Furthermore, there was a clear negative correlation between Acuity and Speed indicating a speed-accuracy trade off commonly found in manual tasks. The repeatability of the test showed acceptable intra class correlation (ICC2.1) values (0.68-0.81) and standard error of measurement values ranging between 5.0–6.3 for Acuity.

    Conclusions

    The initial results suggest that the test may be a valid and feasible test for assessment of the movement sense of the hand. Future research should include assessments on different patient groups and reliability evaluations over time and between testers.

  • 44.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Henriksson, Anders
    Dala Sports Academy, Högskolan i Dalarna, Sverige.
    Tonkonogi, Michail
    Dala Sports Academy, Högskolan i Dalarna.
    Brorsson, Sofia
    Dala Sports Academy, Högskolan i Dalarna.
    Siikavaara, Stefan
    Sverige.
    Projekt: Rörelsekontroll och effektivitet vid flugkastning2012Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    I samarbete med Svenska Castingförbundet och Dala Sports Academy (DSA) vid Högskolan i Dalarna har ett forskningsprojekt kring effektivitet, rörelsekontroll och motorisk inlärning vid flugkastning påbörjats. Samarbetspartner vid DSA är bl.a. adjunkt Anders Henriksson, Professor Michail Tonkonogi och forskaren Sofia Brorsson.

  • 45.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Johansson, Anna-Maria
    Handen och underarmen2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 247-258Chapter in book (Other academic)
    Abstract [sv]

    Den stora variation av uppgifter som människohanden kan utföra kräver god sensomotorisk funktion. Därför kan muskuloskeletala besvär med störningar i handens sensoriska och motoriska funktioner inverka stort på individens förmåga och delaktighet, i såväl arbetsliv som fritid. Handens funktion är också tätt förknippad med underarmens och armbågens anatomi och funktion; därför omfattar detta kapitel besvärstillstånd i både hand, underarm och armbåge. Först beskrivs översiktligt sensomotoriska funktionsstörningar som rapporterats vid några specifika diagnoser, därefter följer exempel på metoder för undersökning och träning av sensomotorisk funktion.

  • 46.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehab.
    Juul-Kristensen, Birgit
    Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark and Institute of Occupational Therapy, Physiotherapy and Radiography, Bergen University College, Bergen, Norway,.
    Motor control alterations in musicians with musculockeletal pain disorders2013In: Musicians' Health and Performance 1st Nordic Conference 2013, Luleå: Luleå University of Technology, Department of Health Sciences , 2013, p. 17-18Conference paper (Refereed)
    Abstract [en]

    Musculoskeletal pain disorder (MSD) is a common cause for long-term work absenteeism among both women and men in the western world, including the Nordic countries. Musicians represent a profession highly afflicted with pain disorders, especially the areas of the neck, shoulder, arm, hand and the upper and lower back.During the last decades an abundant amount of research has reported associations between MSD and motor control disturbances. Common findings include altered neuromuscular coordination and reduced movement precision, as well as reduced strength, endurance and mobility. These disturbances can be of importance for recurrence and duration of the disorders, but also for work ability. Presumably, this can be of specific significance, with risk for absenteeism among professions with high demands on motor control.Musicians are highly dependent on fine motor control, such as fast and accurate finger movements, as well as postural and muscular endurance. Although the amount of research on motor control in pain disorders is extensive, only a few studies have investigated sensorimotor functions among musicians with musculoskeletal pain disorders. Altered posture has been reported, where one study reported dysfunction of the postural stability systems of the low back, shoulder and neck among musicians with playing related disorders (1). However, this study lacked an asymptomatic control group. A couple of studies have reported increased sensorimotor disturbances of the hand and arm among music students with symptoms compared to asymptomatic controls (2, 3). A few studies have investigated muscle activity of superficial neck-shoulder muscles in musicians with neck pain while playing the violin or viola, but the results are incoherent reporting both increased and reduced muscle activity, e.g. (4, 5).Taken together, altered motor control appears to be a concern for musicians with playing related MSD. There is, though, a need for further investigation into motor control functioning among musicians and the association with MSD, especially whilst playing musical instrument. Increased insights in this area can be of important value for prevention and rehabilitation strategies.References1. Steinmetz A et al. Impairment of postural stabilization systems in musicians with playing-related musculoskeletal disorders. J Manip Physiol Ther. 2010 Oct;33(8):603-11.2. Daenen L et al. Sensorimotor incongruence triggers sensory disturbances in professional violinists. Rheumatology. 2010 Jul;49(7):1281-9.3. Baskurt Z et al. Assessment of kinesthetic awareness and fine motor dexterity in music students with performance-related hand disorders. Healthmed. 2012;6(10):3395-402.4. Berque P, Gray H. The influence of neck-shoulder pain on trapezius muscle activity among professional violin and viola players. Med Probl Perform Art. 2002 Jun;17(2):68-75.5. Park KN et al. Comparison of Electromyographic Activity and Range of Neck Motion in Violin Students with and without Neck Pain During Playing. Med Probl Perform Art. 2012 Dec;27(4):188-92.

  • 47.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Lindberg, Conny
    Proprioception: undersökning och träning2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 151-160Chapter in book (Other academic)
    Abstract [sv]

    Nedsatt proprioception har påvisats vid en rad muskuloskeletala besvärstillstånd i olika  kroppsdelar, från fot till nacke. Störd proprioception kan uppstå vid traumatiska skador på till exempel ledband och muskler, men förekommer även vid smärttillstånd som uppstått utan direkt samband med trauma. Dessutom kan nedsatt proprioception bidra till ökad risk för skador. Specifik undersökning och träning av proprioception kan därför vara värdefullt att inkludera vid prevention och rehabilitering av muskuloskeletala besvär. I detta kapitel presenteras generella principer för undersökning och träning av proprioception.

  • 48.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Løvoll, Grunde
    Norwegian Institute for Water Research (NIVA), Section for Environmental Data Science .
    Henriksson, Anders
    Department of Sport and Health Sciences, School of Education, Health and Social Sciences, Dalarna University.
    Tonkonogi, Michail
    Department of Sport and Health Sciences, School of Education, Health and Social Sciences, Dalarna University.
    Lehto, Niklas
    Luleå University of Technology, Department of Health Sciences, Medical Science.
    An Initial Study on the Coordination of Rod and Line Hauling Movements in Distance Fly Casting2017In: Annals of Applied Sport Science, ISSN 2476-4981, Vol. 5, no 2, p. 61-72Article in journal (Refereed)
    Abstract [en]

    Background. The double haul is a unique feature of single-handed fly casting and is used in both fly fishing and fly casting competition. The movement behaviour during the double haul has not been investigated in previous research.

    Objectives. Describe the coordination of the rod and line hauling movements during distance fly casting.

    Methods. Elite fly casters performed distance casting with four different fly rod and fly line set-ups used in fly fishing and fly casting competition. Rod and hauling movements were measured with a 3D motion analysis system.

    Results. The rod and line hauling movements were coordinated in an order whereby peak translational speed of the rod occurs prior to the peak speed of the angular rotation of the rod, and the peak speed of the angular rotation of the rod occurs prior to the peak speed of the line haul. This was consistent for all cast sequences, i.e., the back and forward false casts and the delivery cast, and for all four equipment set-ups, i.e., a shooting-head line cast with a relatively stiff fly rod and a long-belly line cast with three different fly rods with different stiffness and action curves. Results also showed differences in movement coordination between cast sequences and rod and line set-ups.

    Conclusion. Among elite casters, single-handed fly casting with double haul is coordinated in an order of events whereby the peak speed occurs first for the translation of the rod, then for the rotation of the rod and finally for the line haul.

  • 49.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Millisdotter, Monica
    Malmström, Eva-Maj
    Rörelsekontroll och koordination2018In: Idrottsskada / [ed] Eva Rasmussen Barr;Annette Heijne, Lund: Studentlitteratur AB, 2018, 1, p. 171-179Chapter in book (Other academic)
    Abstract [sv]

    Inom idrott och idrottsmedicin analyseras och tränas rörelsefunktioner och motoriska färdigheter för att förbättra prestation, för att minska skaderisk och för att återskapa funktion efter skada. Grundläggande kunskaper om hur rörelser kontrolleras och koordineras är betydelsefulla för fysioterapeuter och andra professioner som arbetar med idrottare, för att kunna utföra relevanta rörelseanalyser och träningsinstruktioner. I detta kapitel beskrivs översiktligt kontroll och koordination av rörelser samt exempel på objektiva mätmetoder för analys av rörelser.

  • 50.
    Röijezon, Ulrik
    et al.
    Luleå University of Technology, Department of Health Sciences, Health and Rehabilitation.
    Millisdotter, Monica
    Malmström, Eva-Maj
    Sensomotorisk kontroll2019In: Motorisk kontroll och inlärning: Med inriktning på muskuloskeletal rehabilitering / [ed] Ulrik Röijezon, Lund: Studentlitteratur AB, 2019, 1, p. 51-66Chapter in book (Other academic)
    Abstract [sv]

    Människans motoriska kontroll involverar sensorisk information från en mängd olika receptorer som samordnas och bearbetas av centrala nervsystemet, vilket sedan i sin tur genererar motoriska kommandon till kroppens muskler. En grundläggande förståelse för hur dessa system fungerar är värdefullt vid prevention och rehabilitering av olika smärttillstånd samt för utveckling av effektivare undersöknings- och behandlingsmetoder. En särskilt utmanande fråga är hur det enorma antalet frihetsgrader som människans rörelser involverar kan kontrolleras och koordineras så att rörelser kan utföras med hög precision och relativt likartat gång på gång. Och detta även i varierande situationer och miljöer trots att människokroppen har cirka 200 leder och 600 muskler att hålla reda på! I detta kapitel ges en översiktlig beskrivning av sensoriska och motoriska system och hur de samordnas och kontrolleras via det centrala nervsystemet.

12 1 - 50 of 62
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