Tanii K, Tsuji S
Human Engineering Department, Industrial Products Research Institute, Ibaraki, Japan.
Electromyogr Clin Neurophysiol. 1993 Jun;33(4):195-204.
Two experiments were performed in order to study whether it is possible to record potentials related to the voluntary movement from electrodes placed on the skin overlying the spinous process of the 2nd and 6th cervical vertebrae and at Erb's point ipsilateral to the movement. In the first series of experiments (Experiment I) the subject initiated spontaneously an arm movement accompanying a contraction of the right triceps brachii muscle. Rapid extension of the right 5 fingers was also performed self paced. Recordings of the potentials were referential to the left knee. The morphology of the potentials from the neck and Erb's point did not differ among time constants, between experimental days, among subjects and between the arm movement and the finger movement. A negative deflection of the cervical potential started preceding the onset of the electromyogram (EMG). This negativity was followed by a positive deflection after the EMG onset. The positive potential was followed by a negative deflection during the rising phase of the EMG. In the second series of experiments the subject performed both reaction and self-paced arm movements. The prime mover was the same as the agonist in Experiment I. Morphology of the potentials recorded with monopolar and bipolar derivations did not differ between the differently initiated movements and among the subjects. The morphology of the potentials from the neck and Erb's point was the same as the morphology of the potentials recorded in Experiment I. The present results indicate that it is possible to record the potentials related to the voluntary movement from neck and supraclavicular fossa.
为了研究是否有可能从置于第2和第6颈椎棘突上方皮肤以及与运动同侧的Erb点的电极记录与随意运动相关的电位，进行了两项实验。在第一系列实验（实验I）中，受试者自发地发起伴随右肱三头肌收缩的手臂运动。还自行控制节奏地快速伸展右手5指。电位记录以左膝为参考。颈部和Erb点的电位形态在时间常数之间、实验日之间、受试者之间以及手臂运动和手指运动之间没有差异。颈部电位的负向偏转在肌电图（EMG）开始之前就已开始。在EMG开始后，这种负向偏转之后是正向偏转。在EMG上升阶段，正向电位之后是负向偏转。在第二系列实验中，受试者进行了反应性和自行控制节奏的手臂运动。原动肌与实验I中的主动肌相同。用单极和双极导联记录的电位形态在不同起始运动之间以及受试者之间没有差异。颈部和Erb点的电位形态与实验I中记录的电位形态相同。目前的结果表明，有可能从颈部和锁骨上窝记录与随意运动相关的电位。
