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标题：Corticospinal activity during a single-leg stance in people with chronic ankle instability
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作者：Masafumi Terada ; Kyle B. Kosik ; Ryan S. McCann 等
期刊名称：Journal of Sport and Health Science
印刷版ISSN：2095-2546
出版年度：2022
卷号：11
期号：1
页码：58-66
DOI：10.1016/j.jshs.2020.08.008
语种：English
出版社：Elsevier
摘要：Highlights • Associations were found between chronic ankle instability and altered corticospinal excitability and inhibition of the tibialis anterior during single-leg standing. • Individuals with chronic ankle instability may have an increase in sensitivity of inhibitory intermediate neurons and a decrease in sensitivity of excitatory neurons in the corticospinal pathway. • Individuals with chronic ankle instability may encounter more difficulty controlling the tibialis anterior muscle during a single-leg stance. Purpose The aim of the study was to determine whether corticospinal excitability and inhibition of the tibialis anterior during single-leg standing differs among individuals with chronic ankle instability (CAI), lateral ankle sprain copers, and healthy controls. Methods Twenty-three participants with CAI, 23 lateral ankle sprain copers, and 24 healthy control participants volunteered. Active motor threshold (AMT), normalized motor-evoked potential (MEP), and cortical silent period (CSP) were evaluated by transcranial magnetic stimulation while participants performed a single-leg standing task. Results Participants with CAI had significantly longer CSP at 100% of AMT and lower normalized MEP at 120% of AMT compared to lateral ankle sprain copers (CSP 100%: p = 0.003; MEP 120%: p = 0.044) and controls (CSP 100%: p = 0.041; MEP 120%: p = 0.006). Conclusion This investigation demonstrate altered corticospinal excitability and inhibition of the tibialis anterior during single-leg standing in participants with CAI. Further research is needed to examine the effects of corticospinal maladaptations to motor control of the tibial anterior on postural control performance in those with CAI. Graphic Abstract Image, graphical abstract
关键词：KeywordsenAnkle sprainJoint instabilityMotor cortexPostural control