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  • 1.
    Pauelsen, Mascha
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Nyberg, Lars
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Vikman, Irene
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Both psychological factors and physical performance are associated with fall-related concerns2018Ingår i: Aging Clinical and Experimental Research, ISSN 1594-0667, E-ISSN 1720-8319, Vol. 30, nr 9, s. 1079-1085Artikel i tidskrift (Refereegranskat)
    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. 

  • 2.
    Pauelsen, Mascha
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Vikman, Irene
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Johansson, Viktor
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Larsson, Agneta
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Decline in sensorimotor systems explains reduced falls self-efficacy2018Ingår i: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 42, s. 104-110Artikel i tidskrift (Refereegranskat)
    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.

  • 3.
    Jafari, Hedyeh
    et al.
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Pauelsen, Mascha
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Nyberg, Lars
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Nikolakopoulos, George
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Gustafsson, Thomas
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    On Internal Modeling of the Upright Postural Control in Elderly2018Konferensbidrag (Refereegranskat)
  • 4.
    Pauelsen, Mascha
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Nyberg, Gusten
    Department of Radiology, Linköping University Hospital.
    Tegner, Cecilia
    Swedish University of Agricultural Sciences, Uppsala.
    Tegner, Yelverton
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Concussion in ice hockey: A Cohort Study Across 29 Seasons2017Ingår i: Clinical Journal of Sports Medicine, ISSN 1050-642X, E-ISSN 1536-3724, Vol. 27, nr 3, s. 283-287Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective: The aim of this study was to analyse the concussion incidence rate ratios (IRR) across 29 seasons in a Swedish Hockey League team.Design: Cohort study over 29 seasons within one Swedish elite series ice hockey team. Participants: All players who were part of one Swedish elite ice hockey team during the research period gave consent for participation in the study.Independent Variables: Exposure to top level Swedish ice hockey. Main Outcome Measures: Incidence rate ratio for concussion as well as rehabilitation periods due to concussion were calculated and analysed.Results: During the research period, 267 players in total were part of the team. A total of 1638 traumatic injuries were registered of which 162 were concussions. Incidence rates ranged from 0/1,000 games during the first season to 118/1,000 games for the final recorded season. The incidence rate ratio was 1.06 (CI = 1.03-1.10) for the entire research period. A shift towards longer rehabilitation periods was discovered.Conclusions: This study showed a significant increase of concussion incidence rate and a trend towards longer rehabilitation periods due to concussion. Possible risk factors were discussed. Risk behaviour and rehabilitation protocols should be prioritized areas in the research of concussion in ice hockey. 

  • 5. Pauelsen, Mascha
    et al.
    Nyberg, Lars
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Vikman, Irene
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Fear, morale, and physical performance, not past falls, mediate fallsefficacy in community dwelling older people2017Ingår i: WCPT 2017 congress proceedings, 2017Konferensbidrag (Refereegranskat)
    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.

  • 6.
    Mamikoglu, Umut
    et al.
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Nikolakopoulos, George
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Pauelsen, Mascha
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Varagnolo, Damiano
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Gustafsson, Thomas
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Elbow Joint Angle Estimation by Using Integrated Surface Electromyography2016Ingår i: 24th Mediterranean Conference on Control and Automation (MED): June 21-24, Athens, Greece, 2016, Piscataway, NJ: IEEE Communications Society, 2016, s. 785-790, artikel-id 7535891Konferensbidrag (Refereegranskat)
    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.

  • 7.
    Mamikoglu, Umut
    et al.
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Andrikopoulos, Georgios
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Nikolakopoulos, George
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Röijezon, Ulrik
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Pauelsen, Mascha
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Gustafsson, Thomas
    Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.
    Electromyography Based Joint Angle Estimation and Control of a Robotic Leg2016Ingår i: 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, s. 182-187, artikel-id 7523619Konferensbidrag (Refereegranskat)
    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.

  • 8.
    Pauelsen, Mascha
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Tegner, Yelverton
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Hjärnskakning i hockey: en studie över 29 säsonger2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [sv]

    Hockey är en intensiv sport med en stor risk för commotio. Syftet med studien var att analysera förändring i incidensen av commotio över en 29-års period i ett svenskt elit hockeylag. Under åren 1985-2013 gjordes en prospektiv skaderegistrering i laget. Alla skador som föranledde avbrytande eller bortovaro från match/träning registrerades. skadeorsak, -tidpunkt, -mekanism etc. och närvaro på match/träning registrerades i ett skaderegistreringsprogram (ISIS). Skadedefinitionen på commotio var - förutom under första året - densamma över hela perioden och alla diagnoser ställdes av en och samma läkare. Under studieperioden var 267 spelare med i laget. Totalt registrerades 1628 traumatiska skador och av dessa var 162 (10%) commotio. Incidensen av commotio varierade från 0/1000 matcher under första säsongen till 118/1000 matcher under den sista säsongen. De flesta (85%) av commotio inträffade under match. Bortovaron pga commotio ökade från 0 dagar till 10 dagar per commotio (p<0,001) under studieperioden. Denna kohortstudie visar på en ökning av commotio incidensen över en 29 års period. Vidare ökar bortovaron från match/träning tydande på att skadorna blir allvarligare.

  • 9.
    Pauelsen, Mascha
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Jacobson, Inger
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Larsson, Agneta
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Tegner, Yelverton
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Skadepanorama och riskfaktorer inom Flat Track Roller Derby2014Ingår i: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 2014, nr 1, s. 22-25Artikel i tidskrift (Övrigt vetenskapligt)
1 - 9 av 9
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  • de-DE
  • en-GB
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