Muscle activation varies with contraction mode in human spinal cord injury.
Muscle activation varies with contraction mode in human spinal cord injury.
复制标题
人类脊髓损伤时，肌肉激活随收缩模式而变化。
DOI：
10.1002/mus.24285
复制
发表时间：
2015
期刊：
影响因子：
3.4
通讯作者：
Hornby,TGeorge
中科院分区：
文献类型：
--
作者：
Kim,HyosubE;Thompson,ChristopherK;Hornby,TGeorge
Introduction: To better understand volitional force generation after chronic incomplete spinal cord injury (SCI), we examined muscle activation during single and repeated isometric, concentric, and eccentric knee extensor (KE) maximal voluntary contractions (MVCs).Methods: Torque and electromyographic (EMG) activity were recorded during single and repeated isometric and dynamic KE MVCs in 11 SCI subjects. Central activation ratios (CARs) were calculated for all contraction modes in SCI subjects and 11 healthy controls.Results: SCI subjects generated greater torque, KE EMG, and CARs during single eccentric vs. isometric and concentric MVCs (allP< 0.05). Torque and EMG remained similar during repeated eccentric MVCs; however, both increased during repeated isometric (>25%) and concentric (>30%) MVCs.Conclusions: SCI subjects demonstrated greater muscle activation during eccentric MVCs vs. isometric and concentric MVCs. This pattern of activation contrasts with the decreased eccentric activation demonstrated by healthy controls. Such information may aid development of novel rehabilitation interventions. Muscle Nerve51: 235–245, 2015
