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Publications (8 of 8) Show all publications
Pauelsen, M., Vikman, I., Johansson, V., Larsson, A. & Röijezon, U. (2018). Decline in sensorimotor systems explains reduced falls self-efficacy. Journal of Electromyography & Kinesiology, 42, 104-110
Open this publication in new window or tab >>Decline in sensorimotor systems explains reduced falls self-efficacy
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2018 (English)In: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 42, p. 104-110Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Elsevier, 2018
National Category
Physiotherapy
Research subject
Physiotherapy
Identifiers
urn:nbn:se:ltu:diva-70143 (URN)10.1016/j.jelekin.2018.07.001 (DOI)000441876400013 ()30015133 (PubMedID)2-s2.0-85049755548 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-08-08 (andbra)

Available from: 2018-07-20 Created: 2018-07-20 Last updated: 2018-12-03Bibliographically approved
Jafari, H., Pauelsen, M., Röijezon, U., Nyberg, L., Nikolakopoulos, G. & Gustafsson, T. (2018). On Internal Modeling of the Upright Postural Control in Elderly. In: : . Paper presented at 2018 IEEE International Conference on Robotics and Biomimetics (IEEE ROBIO 2018), December 12-15, 2018, Kuala Lumpur, Malaysia..
Open this publication in new window or tab >>On Internal Modeling of the Upright Postural Control in Elderly
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Control Engineering Physiotherapy
Research subject
Control Engineering; Physiotherapy
Identifiers
urn:nbn:se:ltu:diva-72472 (URN)
Conference
2018 IEEE International Conference on Robotics and Biomimetics (IEEE ROBIO 2018), December 12-15, 2018, Kuala Lumpur, Malaysia.
Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-15
Pauelsen, M., Nyberg, G., Tegner, C. & Tegner, Y. (2017). Concussion in ice hockey: A Cohort Study Across 29 Seasons (ed.). Clinical Journal of Sports Medicine, 27(3), 283-287
Open this publication in new window or tab >>Concussion in ice hockey: A Cohort Study Across 29 Seasons
2017 (English)In: Clinical Journal of Sports Medicine, ISSN 1050-642X, E-ISSN 1536-3724, Vol. 27, no 3, p. 283-287Article in journal (Refereed) Published
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. 

Place, publisher, year, edition, pages
Wolters Kluwer, 2017
Keywords
Athletic Injuries, Brain Concussion, Incidence Rate, Ice Hockey, Medicine, Medicin
National Category
Physiotherapy Other Health Sciences
Research subject
Physiotherapy; Health Science
Identifiers
urn:nbn:se:ltu:diva-14641 (URN)10.1097/JSM.0000000000000347 (DOI)000400635100008 ()28449005 (PubMedID)2-s2.0-85019961240 (Scopus ID)e0dc05fc-0595-4ded-b6da-bd8d66a827b5 (Local ID)e0dc05fc-0595-4ded-b6da-bd8d66a827b5 (Archive number)e0dc05fc-0595-4ded-b6da-bd8d66a827b5 (OAI)
Note

Validerad; 2017; Nivå 2; 2017-05-02 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-11-19Bibliographically approved
Pauelsen, M., Nyberg, L., Röijezon, U. & Vikman, I. (2017). Fear, morale, and physical performance, not past falls, mediate fallsefficacy in community dwelling older people. In: WCPT 2017 congress proceedings: . Paper presented at World Confederation for Physical Therapy Congress 2017, Cape Town, South Africa, 2-4 July 2017.
Open this publication in new window or tab >>Fear, morale, and physical performance, not past falls, mediate fallsefficacy in community dwelling older people
2017 (English)In: WCPT 2017 congress proceedings, 2017Conference paper, Oral presentation with published abstract (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.

Keywords
Aged, Fallrelated Concern, Morale
National Category
Physiotherapy
Research subject
Physiotherapy
Identifiers
urn:nbn:se:ltu:diva-66094 (URN)
Conference
World Confederation for Physical Therapy Congress 2017, Cape Town, South Africa, 2-4 July 2017
Projects
BAHRT
Funder
Swedish Research Council
Available from: 2017-10-12 Created: 2017-10-12 Last updated: 2018-04-24Bibliographically approved
Mamikoglu, U., Nikolakopoulos, G., Pauelsen, M., Varagnolo, D., Röijezon, U. & Gustafsson, T. (2016). Elbow Joint Angle Estimation by Using Integrated Surface Electromyography (ed.). In: (Ed.), 24th Mediterranean Conference on Control and Automation (MED): June 21-24, Athens, Greece, 2016. Paper presented at Mediterranean Conference on Control and Automation : 21/06/2016 - 24/06/2016 (pp. 785-790). Piscataway, NJ: IEEE Communications Society, Article ID 7535891.
Open this publication in new window or tab >>Elbow Joint Angle Estimation by Using Integrated Surface Electromyography
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2016 (English)In: 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.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2016
Series
Mediterranean Conference on Control and Automation, E-ISSN 2325-369X
Keywords
Information technology - Automatic control, Informationsteknik - Reglerteknik
National Category
Control Engineering Physiotherapy
Research subject
Control Engineering; Physiotherapy
Identifiers
urn:nbn:se:ltu:diva-35118 (URN)10.1109/MED.2016.7535891 (DOI)000391154900131 ()2-s2.0-84986193000 (Scopus ID)9862c70d-adec-409a-b5b4-43d7ec14fad7 (Local ID)978-1-4673-8345-5 (ISBN)9862c70d-adec-409a-b5b4-43d7ec14fad7 (Archive number)9862c70d-adec-409a-b5b4-43d7ec14fad7 (OAI)
Conference
Mediterranean Conference on Control and Automation : 21/06/2016 - 24/06/2016
Note

Godkänd; 2016; 20160419 (geonik)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Mamikoglu, U., Andrikopoulos, G., Nikolakopoulos, G., Röijezon, U., Pauelsen, M. & Gustafsson, T. (2016). Electromyography Based Joint Angle Estimation and Control of a Robotic Leg (ed.). In: (Ed.), 6th IEEE RAS and EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob 2016): June 26-29, Singapore, 2016. Paper presented at IEEE RAS and EMBS International Conference on Biomedical Robotics and Biomechatronics : 26/06/2016 - 29/06/2016 (pp. 182-187). Piscataway, NJ: IEEE Communications Society, Article ID 7523619.
Open this publication in new window or tab >>Electromyography Based Joint Angle Estimation and Control of a Robotic Leg
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2016 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2016
Series
Proceedings of the IEEE RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics, ISSN 2155-1782
National Category
Control Engineering Physiotherapy
Research subject
Control Engineering; Physiotherapy
Identifiers
urn:nbn:se:ltu:diva-37878 (URN)10.1109/BIOROB.2016.7523619 (DOI)000392266900030 ()2-s2.0-84983379589 (Scopus ID)c0c5b0d8-35b7-412e-8529-e7298dca57f9 (Local ID)978-1-4673-8345-5 (ISBN)c0c5b0d8-35b7-412e-8529-e7298dca57f9 (Archive number)c0c5b0d8-35b7-412e-8529-e7298dca57f9 (OAI)
Conference
IEEE RAS and EMBS International Conference on Biomedical Robotics and Biomechatronics : 26/06/2016 - 29/06/2016
Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-12-18Bibliographically approved
Pauelsen, M. & Tegner, Y. (2015). Hjärnskakning i hockey: en studie över 29 säsonger (ed.). Paper presented at Svensk Idrottsmedicinsk Förening. Vårmöte : 08/05/2014 - 09/05/2014. Paper presented at Svensk Idrottsmedicinsk Förening. Vårmöte : 08/05/2014 - 09/05/2014.
Open this publication in new window or tab >>Hjärnskakning i hockey: en studie över 29 säsonger
2015 (English)Conference paper, Oral presentation only (Other academic)
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.

National Category
Physiotherapy Other Health Sciences
Research subject
Physiotherapy; Health Science
Identifiers
urn:nbn:se:ltu:diva-28373 (URN)22703ade-e95f-450c-b0c1-d848067508d3 (Local ID)22703ade-e95f-450c-b0c1-d848067508d3 (Archive number)22703ade-e95f-450c-b0c1-d848067508d3 (OAI)
Conference
Svensk Idrottsmedicinsk Förening. Vårmöte : 08/05/2014 - 09/05/2014
Note
Godkänd; 2015; 20160203 (maspau)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Pauelsen, M., Jacobson, I., Larsson, A. & Tegner, Y. (2014). Skadepanorama och riskfaktorer inom Flat Track Roller Derby (ed.). Paper presented at . Svensk idrottsmedicin, 2014(1), 22-25
Open this publication in new window or tab >>Skadepanorama och riskfaktorer inom Flat Track Roller Derby
2014 (Swedish)In: Svensk idrottsmedicin, ISSN 1103-7652, Vol. 2014, no 1, p. 22-25Article in journal (Other academic) Published
National Category
Physiotherapy Other Health Sciences
Research subject
Physiotherapy; Physiotherapy; Health Science
Identifiers
urn:nbn:se:ltu:diva-2974 (URN)0b81f26e-2a38-4a19-bfb8-59c36aeb2ba9 (Local ID)0b81f26e-2a38-4a19-bfb8-59c36aeb2ba9 (Archive number)0b81f26e-2a38-4a19-bfb8-59c36aeb2ba9 (OAI)
Note
Godkänd; 2014; Bibliografisk uppgift: Inger, Agneta och Yelverton ÄR medförfattare trots att de av misstag inte är medtagna i tidskriften. AB Rättelse i Svensk Idrottsmedicin 2/14, s 36: Vid sidan om Mascha Pauelsen som ensam angavs vara författare till artikeln om Roller Derby i förra numret borde rätteligen även följande namn nämnas: I Jacobson Ph.D., A Larson Ph.D., Y Tegner M.D., Ph.D., B.A. Samtliga knutna till Institutionen för Hälsovetenskap, Luleå Tekniska Universitetet, Luleå. Redaktionen ber om överseende med misstaget.; 20140504 (agnlar)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2510-7571

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