Masakado Y, Noda Y, Nagata M A, Kimura A, Chino N, Akaboshi K
Department of Rehabilitation Medicine, Keio University School of Medicine, Tokyo, Japan.
Neurosci Lett. 1994 Sep 26;179(1-2):1-4. doi: 10.1016/0304-3940(94)90920-2.
The relationship between macro-EMG (electromyography) and motor unit recruitment threshold was studied in the first dorsal interosseous (FDI) muscle of normal young and aged subjects. During voluntary isometric contraction, motor unit action potentials (MUAP) were collected by a special quadrifilar electrode and decomposed to each MUAP train (MUAPT) using an EMG signal decomposition technique. Macro-EMG was obtained from the electrode shaft, then triggered and averaged for each MUAPT. A positive linear correlation was observed in both the young and aged subjects. However, the correlation coefficients were significantly lower in the aged individuals than in the young individuals.
研究了正常年轻人和老年人第一背侧骨间肌（FDI）中宏肌电图（肌电图）与运动单位募集阈值之间的关系。在自主等长收缩期间，使用特殊的四线电极收集运动单位动作电位（MUAP），并使用肌电信号分解技术将其分解为每个运动单位动作电位序列（MUAPT）。从电极轴获取宏肌电图，然后针对每个MUAPT进行触发和平均。在年轻人和老年人中均观察到正线性相关性。然而，老年人的相关系数明显低于年轻人。
