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Experimental Brain Research

, Volume 232, Issue 6, pp 1773–1782 | Cite as

The effect of cognitive task complexity on gait stability in adolescents following concussion

  • David R. Howell
  • Louis R. Osternig
  • Michael C. Koester
  • Li-Shan Chou
Research Article

Abstract

Concussion has been reported to result in disturbances to motor and cognitive functions. One way to examine these disturbances is through a dual-task assessment. Many secondary cognitive tasks have been proposed as appropriate tools during concussion assessment; however, task complexity has not been compared within a dual-task investigation. The purpose of this study was to prospectively examine how gait balance control was affected by three secondary cognitive tasks of varying complexity following concussion. Forty-six adolescents completed a dual-task walking protocol which included walking without any cognitive task (WALK), walking while completing a single auditory Stroop (SAS), multiple auditory Stroop (MAS), and a question and answer task (Q&A). Those who sustained a concussion (n = 23, mean age 15.4 ± 1.3 years) reported to the laboratory within 72 h of injury and in the following time increments: 1 week, 2 weeks, 1 month, and 2 months post-injury. Twenty-three healthy control subjects (mean age 15.4 ± 1.3 years), individually matched to each concussion subject, completed the same protocol in similar time increments. The concussion group demonstrated greater total center of mass (COM) medial/lateral displacement in the MAS and Q&A conditions compared with the control group. The concussion group also displayed the greatest peak COM anterior velocity in the least complex condition (WALK), and a significant decrease was observed as task complexity increased (SAS > MAS > Q&A). These findings indicate that gait balance control may be affected by task complexity following concussion and represent a way to identify motor recovery following concussion.

Keywords

Brain injury Dual task Gait Balance Recovery 

Notes

Acknowledgments

This work was supported by the Veterans Administration (Subcontract Awards Nos. A4842C8 and A4843C), the Department of Defense-TATRC (Award No. W81XWH-11-1-0717), and the translational research award from the University of Oregon and Peace Health Oregon Region.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • David R. Howell
    • 1
  • Louis R. Osternig
    • 1
  • Michael C. Koester
    • 2
  • Li-Shan Chou
    • 1
  1. 1.Department of Human Physiology1240 University of OregonEugeneUSA
  2. 2.Slocum Center for Orthopedics and Sports MedicineEugeneUSA

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