Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
Department of Physical Therapy, University of Nevada Las Vegas, Las Vegas, NV, USA.
J Mot Behav. 2021;53(1):40-46. doi: 10.1080/00222895.2020.1723480. Epub 2020 Feb 24.
The purpose of this study was to determine the association between corticomotor excitability (CME) of gluteus maximus (GM) and hip biomechanics during a single-leg drop-jump task. Thirty-two healthy individuals participated. The slope of the input-output curve (IOC) obtained from transcranial magnetic stimulation was used to assess CME of GM. The average hip extensor moment and peak hip flexion angle during the stance phase of the drop jump task was calculated. The slope of the IOC of GM was found to be a predictor of the average hip extensor moment (r = 0.18, = 0.016) and peak hip flexion angle (r = 0.20, = 0.01). Our results demonstrate that greater functional use of the hip was associated with enhanced descending neural drive of GM.
本研究旨在确定单腿跳落任务中臀大肌皮质运动兴奋性（CME）与髋关节生物力学之间的关系。32 名健康个体参与了本研究。通过经颅磁刺激获得的输入-输出曲线（IOC）斜率用于评估 GM 的 CME。计算跳落任务站立阶段的平均髋关节伸肌力矩和最大髋关节屈曲角度。结果发现，GM 的 IOC 斜率是平均髋关节伸肌力矩（r = 0.18， = 0.016）和最大髋关节屈曲角度（r = 0.20， = 0.01）的预测因子。我们的研究结果表明，髋关节的更功能性使用与 GM 的下行神经驱动增强相关。
