A preliminary cross-sectional assessment of postural control responses to continuous platform rotations following a sport-related concussion |
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| Affiliation: | 1. Research Institute for Sport and Exercise Science, Tom Reilly Building, Byrom Street, Liverpool John Moores University, Liverpool, L3 3AF, UK;2. Department of Sport and Exercise Sciences, Manchester Metropolitan University, All Saints Building, Manchester, M15 6BH, UK;1. Department of Neurology, Weill-Cornell Medical College, Houston Methodist Hospital, Houston Methodist Concussion Center, 6560 Fannin Street, Suite 1840, Houston, TX 77030, USA;2. Department of Neurology, Houston Methodist Hospital, Houston Methodist Concussion Center, 6560 Fannin Street, Suite 1840, Houston, TX 77030, USA;1. Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR 97403, USA;2. Baylor University – Keller Army Community Hospital Division 1 Sports Physical Therapy Fellowship, United States Military Academy, West Point, NY, 10966, USA;3. Department of Kinesiology, Iowa State University, Ames, IA 50011, USA;1. School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Brazil;2. College of Kinesiology, University of Saskatchewan, Canada;3. Graduate Program in Rehabilitation and Functional Performance, Ribeirão Preto Medical School, University of São Paulo, Brazil;1. Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, 200438, China;2. School of Health & Kinesiology, Georgia Southern University, Statesboro, GA, 30460, USA;3. Center for Orthopaedic & Biomechanics Research, Boise State University, Boise, ID, 83725, USA;1. Neural Control of Movement Laboratory, School of Medicine, Faculty of Science, Medicine & Health, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia;2. Research Institute for Sports and Exercise Sciences (RISES), Tom Reilly Building, School of Sport and Exercise Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom |
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| Abstract: | BackgroundIndividuals suffering a sport-related concussion typically recover within 1 month; however, persistent post-concussive symptoms are known to occur beyond this period. Clinical guidelines may not be sufficient to determine if dynamic postural control is still impaired at the point of the return to play decision.Research questionDo individuals with a previous sport-related concussion who have returned to play show differences in postural control compared to individuals without a previous concussion, in response to continuous platform perturbations?MethodsEight previously concussed and eight age- and position-matched participants completed six one-minute trials (three with eyes open/closed) whilst stood on a moving platform that rotated about the pitch axis with a peak-to-peak amplitude of 4° at a frequency of 0.8 Hz. Six trials were also captured during static quiet stance for comparison. Reactive and anticipatory stages of postural control were analysed by determining anteroposterior margins of stability (MoS) as a measure of whole-body postural control and head-to-trunk anchoring index as an indication of the head-trunk segmental coupling strategy.ResultsPosterior MoS during platform rotations reduced for both groups during eyes closed trials, but previously concussed participants exhibited a significantly greater reduction (1.97 cm) in comparison to matched-controls (0.34 cm). Participants, regardless of group, showed a preference towards a head-stabilised-to-trunk strategy during platform rotations. There were no differences during static trials.SignificanceThis preliminary study suggests previously concussed athletes demonstrate a greater reduction in postural control whilst undergoing continuous platform rotations with eyes closed, which could indicate possible lingering deficits to other sensory systems such as the vestibular system, though participants were not likely to lose their balance. |
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| Keywords: | Sport concussion Margins of stability Anchoring index Return to play Postural control |
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