Szpala Agnieszka, Rutkowska-Kucharska Alicja
Department of Biomechanics, University School of Physical Education in Wrocław, al. I.J, Paderewskiego 35, 51-612, Wrocław, Poland.
Muscle Nerve. 2017 Dec;56(6):E147-E153. doi: 10.1002/mus.25647. Epub 2017 Apr 5.
The aim of the study was to compare electromechanical response times [total reaction time (TRT), pre-motor time (PMT), and electromechanical delay] in the knee muscles in groups of young and older women during release of peak torque (PT).
Fifty women (1 group approximately 20 years of age and the other approximately 60 years of age) participated in the study. PT and electromyographic activity were measured for flexors and extensors of the right and left knee in static conditions in response to a visual stimulus.
Significantly longer TRTs (P = 0.05) and PMTs (P = 0.05) were found in the group of older women compared with the younger participants. Asymmetry was found between the older and the younger group of women in PT of knee flexors.
Significantly longer TRT and PMT phases in the group of older women suggests a longer time for information processing in the central nervous system in older people. Muscle Nerve 56: E147-E153, 2017.
本研究旨在比较年轻女性组和老年女性组在峰值扭矩（PT）释放期间膝关节肌肉的机电反应时间[总反应时间（TRT）、运动前时间（PMT）和机电延迟]。
五十名女性（一组约20岁，另一组约60岁）参与了本研究。在静态条件下，针对视觉刺激测量左右膝关节屈伸肌的PT和肌电图活动。
与年轻参与者相比，老年女性组的TRT（P = 0.05）和PMT（P = 0.05）明显更长。老年女性组和年轻女性组在膝关节屈肌的PT方面存在不对称性。
老年女性组中明显更长的TRT和PMT阶段表明老年人中枢神经系统中信息处理的时间更长。《肌肉与神经》56: E147-E153, 2017年。
