Immediate Effects of Transcranial Alternating Current Stimulation on Quadriceps Active Motor Threshold and Central Activation Ratio

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Last Modified
  • March 19, 2019
Creator
  • Zaleski, Ariel
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • Quadriceps muscle dysfunction is commonly reported in individuals with knee joint injury. Decreased corticospinal excitability and activation are believed to be the neural causes of quadriceps dysfunction following knee joint injury. The purpose of this study was to examine if transcranial alternating current stimulation (tACS) can acutely alter corticospinal excitability and voluntary activation of the quadriceps in healthy individuals. Active motor threshold (AMT) and central activation ratio (CAR) were evaluated in a single-blinded, crossover study. Thirty-four participants were counterbalanced over 2 testing sessions to receive tACS or control. A dependent samples t-test was used to examine percent change scores for AMT and CAR between the two sessions. A post-hoc analysis was also run to evaluate any association between AMT percent change scores for the two sessions. No significant difference was found between the percent change scores and no association was found between the intervention and control sessions for AMT.
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  • In Copyright
Advisor
  • Luc, Brittney
  • Blackburn, J. Troy
  • Pietrosimone, Brian
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2016
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