Association Between Active Motor Threshold, Electromyographic Onset Times, and Ground Reaction Force Rate of Loading During Gait in Patients with Anterior Cruciate Ligament Reconstruction

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  • March 19, 2019
Creator
  • Fegley, Justin
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • Previous studies have found that anterior cruciate ligament reconstructed (ACL-R), individuals demonstrate altered corticospinal excitability, quadriceps activation, and vertical ground reaction force (vGRF) loading rates during walking gait. Altered corticospinal excitability may influence the onset of quadriceps activity in preparation for heel strike, which could lead to an increased vGRF rate of loading. The purpose of this study was to determine the association between corticospinal excitability and vGRF rate of loading and quadriceps electromyography activity onset times during walking gait in ACL-R individuals. Individuals in this study participated in two testing sessions separated by at least one week. This study found a significant negative association between corticospinal excitability and vGRF rate of loading but no association between corticospinal excitability and quadriceps EMG onset times. The results of this study suggest that ACL-R individuals with higher corticospinal excitability have higher vGRF during walking gait.
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  • In Copyright
Advisor
  • Harkey, Matthew
  • Pietrosimone, Brian
  • Blackburn, J. Troy
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2015
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  • Chapel Hill, NC
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