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Citation
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Lynall RC, Blackburn JT, Guskiewicz KM, Marshall SW, Plummer P, Mihalik JP. Arch. Phys. Med. Rehabil. 2018; 99(5): 880-886. |
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Affiliation
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Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill; Human Movement Science Curriculum, Department of Allied Health Sciences, University of North Carolina at Chapel Hill. |
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Abstract
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OBJECTIVE: To compare movement reaction time and joint kinematics between recently concussed and matched control recreational athletes during 3 functional tasks.
DESIGN: Cross-sectional. SETTING: Laboratory. PARTICIPANTS: Thirty college-aged recreational athletes comprising two groups (15 participants each): 1) Recent concussion group (median time since concussion 126 days, range 28-432 days), and 2) Age- and sex-matched control group with no recent concussions. INTERVENTIONS: We investigated movement reaction time and joint kinematics during 3 tasks: 1) Jump-landing, 2) Anticipated-cut, and 3) Unanticipated-cut. MAIN OUTCOME MEASURES: Reaction time and reaction time cost (reaction timejump landing-reaction timecut/reaction timejump landingx100%), along with trunk, hip, and knee joint angles in the sagittal and frontal planes at initial ground contact.
RESULTS: There were no reaction time between-group differences, but the control group displayed improved reaction time cost (10.7%) during anticipated cutting as compared to the concussed group (0.8%; p=0.030). The control group displayed less trunk flexion than the concussed group during the non-dominant anticipated cut (5.1° difference; p=0.022). There were no other kinematic between-group differences (p≥0.079).
CONCLUSIONS: We observed subtle reaction time and kinematic differences between recently concussed and non-concussed individuals more than a month after return-to-activity following concussion. The clinical interpretation of these findings remains unclear, but may have future implications for post-concussion management and rehabilitation.
Copyright © 2018. Published by Elsevier Inc.
Language: en |