Tianjin Key Lab of Exercise Physiology and Sports Medicine, College of Social Sport and Health Science, Tianjin University of Sport, Tianjin, China.
Institute of Sports and Health Science, Hiroshima, Japan.
J Mot Behav. 2023;55(1):31-38. doi: 10.1080/00222895.2022.2092440. Epub 2022 Jul 24.
We investigated the generation of anticipatory (APAs) and compensatory postural adjustments (CPAs) in preparation for a step during support surface perturbation. Changes in anticipatory muscle activation in the trunk segment were predominantly in the co-contraction indices from -600 -400 ms to foot-off. Reciprocal indices of the shank muscles were pronounced in the APA intervals. During the CPA intervals, larger reciprocal muscle activities were detected compared to the APA intervals. The results showed subjects co-varied the reciprocal and co-contraction activations in postural muscles to counteract the perturbation and generate mechanical effects sufficient for stepping during the APA and CPA intervals. This study enhances our understanding of the interaction between the APAs and CPAs in balance maintenance.
我们研究了在支撑面扰动期间准备跨步时预期性（APAs）和代偿性姿势调整（CPAs）的产生。在从-600 到-400 毫秒至脚离地的时间段内，躯干节段中预期性肌肉激活的变化主要表现为共同收缩指数。小腿肌肉的反向指数在 APA 间隔中明显。在 CPA 间隔期间，与 APA 间隔相比，检测到更大的反向肌肉活动。结果表明，受试者在姿势肌肉中共同变化反向和共同收缩激活，以抵消扰动并在 APA 和 CPA 间隔期间产生足够的机械效应以进行跨步。这项研究增强了我们对平衡维持中 APAs 和 CPAs 之间相互作用的理解。
