Schieber John R, Suresh Nina L, Rymer W Zev, Zhou Ping
Rehabilitation Institute of Chicago, and McCormick School of Engineering of Northwestern University, Chicago, IL 60611, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:222-3. doi: 10.1109/IEMBS.2009.5334471.
Individual motor unit action potential (MUAP) propagation along the muscle fibers was assessed in paretic muscle of stroke survivors. Single motor unit activity was recorded from the biceps brachii muscle on the paretic side of stroke survivors using a surface electrode array. Among the 15 clearly identified low-threshold motor units, six units showed little delay between MUAPs on different electrodes aligned along muscle fibers, resulting in abnormally high values of calculated propagation velocities, while clear action potential delay was observed for the other motor units. Several factors that possibly lead to this observation are discussed.
在中风幸存者的患侧肌肉中评估了单个运动单位动作电位（MUAP）沿肌纤维的传播情况。使用表面电极阵列记录中风幸存者患侧肱二头肌的单个运动单位活动。在15个明确识别出的低阈值运动单位中，有6个单位沿肌纤维排列的不同电极上的MUAP之间几乎没有延迟，导致计算出的传播速度值异常高，而其他运动单位则观察到明显的动作电位延迟。讨论了可能导致这一观察结果的几个因素。
