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Alkathiry, Abdulaziz (2017) THE EFFECT OF RECENT CONCUSSION ON BALANCE DURING SINGLE AND DUAL TASKS IN ADOLESCENTS. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Purpose: Returning to normal activity without full recovery from concussion may make athletes with concussion more susceptible to a second more severe concussion. Dual-task balance testing has been suggested to provide better assessment of when to return to normal activity. The purpose was to explore changes during single and dual-task balancing conditions over time and to compare sway between adolescents with and without Sports-related Concussion (SRC).
Participants: 25 adolescents (mean age 15.1±1.9 y) with SRC within the past 10 days and 22 matched controls (mean age 15.9±2.1 y).
Materials/Methods: Adolescents with SRC were assessed 3 times: within 10 days of injury, within 14-27 days after injury, and when cleared from concussion. Controls were assessed once. Sway was assessed using a force plate while subjects stood feet-apart on firm or foam surfaces. Balance tests were performed under single-task (without cognitive-task) and dual-task conditions (with cognitive-task). The cognitive-task was a visual reaction time test where adolescents pressed a thumb-switch that either corresponded to the side of the monitor where a rectangle appeared (simple cognitive-task), or corresponded to the direction an arrow was pointing that appeared on either side of the monitor (complex cognitive-task). The dependent variables were the root mean square (RMS) and the normalized path length (NPL) of the sway. A linear mixed model was performed to investigate the main effects and interactions of group, visit, dual-task, cognitive-task, and surface on sway.
Results: The main findings were: no difference in sway between the SRC and control groups; no difference in sway among visits in the SRC group; a dual-task effect that produced reduced NPL sway and greater RMS sway compared with the single-task; increased RMS sway during the perceptual inhibition task compared with the spatial discrimination task; and increased sway during the foam conditions compared with firm surface, which was dependent on the subject groups.
Conclusions: Contrary to previous research, no differences in balance performance were observed between groups with and without SRC, or over time in adolescents with SRC, indicating that the type of dual-task may be an important factor in assessing return to normal activity.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Alkathiry, Abdulazizaaa100@pitt.eduaaa1000000-0001-7715-6773
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairSparto,
Committee MemberKontos,
Committee MemberFurman,
Committee MemberWhitney,
Date: 23 January 2017
Date Type: Publication
Defense Date: 15 November 2016
Approval Date: 23 January 2017
Submission Date: 7 December 2016
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 231
Institution: University of Pittsburgh
Schools and Programs: School of Health and Rehabilitation Sciences > Health and Rehabilitation Sciences
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Concussion;vHIT;Dual-task;Balance;mTBI;BESS
Date Deposited: 23 Jan 2017 16:01
Last Modified: 23 Jan 2019 06:15

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