Masakado Y, Abe L, Kawakami M, Suzuki K, Ota T, Kimura A, Takahashi N, Liu M
Keio University Tsukigase Rehabilitation Center, Izu-city, Shizuoka, Japan.
Electromyogr Clin Neurophysiol. 2008 Jan-Feb;48(1):9-11.
When recording with a palm electrode, a premotor potential (PMP) precedes the compound muscle action potential evoked from the second lumbrical muscle following median nerve stimulation. The origin of the premotor potential has remained uncertain. The aim of this study was to determine whether the PMP-2L is a SNAP derived from antidromically activated digital sensory branches of the median nerve.
We recorded three active electrodes were placed over the second lumbrical muscle, the third lumbrical muscle, the fourth lumbrical muscle by multi-channel recordings.
PMPs are recorded only over the median digital sensory branches after stimulating the median nerve, while they are recorded only over the ulnar branch after stimulating the ulnar nerve.
We conclude that the origin of the PMP is a SNAP arising from antidromically activated digital sensory branches.
使用掌部电极记录时，在正中神经刺激后，第二蚓状肌诱发的复合肌肉动作电位之前会出现一个运动前电位（PMP）。运动前电位的起源尚不确定。本研究的目的是确定PMP-2L是否是源自正中神经逆向激活的指感觉支的感觉神经动作电位（SNAP）。
我们通过多通道记录，将三个活性电极分别置于第二蚓状肌、第三蚓状肌、第四蚓状肌上。
刺激正中神经后，仅在正中指感觉支上记录到PMP，而刺激尺神经后，仅在尺支上记录到PMP。
我们得出结论，PMP的起源是逆向激活的指感觉支产生的SNAP。
