Ganchev G N, Gavrilenko T F
Zh Vyssh Nerv Deiat Im I P Pavlova. 1990 Sep-Oct;40(5):884-90.
The effect of sustained isometric contraction on somatosensory evoked potentials (SEPs) was studied. An attenuation of early SEP components N20--P30, P30--N35) was observed during the last minute of the endurance time. The late components (P45--N55, N55--P100) showed a significant increase of the amplitude during the first minute of the contraction. The amplitude of N35--P45 did not change during voluntary contraction, although it was decreased immediately after the contraction. An increase of the integrated EMG of forearm flexors was observed in the last minute of the endurance time. The maximal voluntary contraction was decreased immediately after the sustained contraction. The observed changes in SEPs could be attributed to possible changes in sensory information and motor command due to motor task.
研究了持续等长收缩对体感诱发电位（SEPs）的影响。在耐力时间的最后一分钟观察到早期SEP成分（N20 - P30、P30 - N35）的衰减。晚期成分（P45 - N55、N55 - P100）在收缩的第一分钟显示出幅度显著增加。N35 - P45的幅度在自主收缩期间没有变化，尽管在收缩后立即降低。在耐力时间的最后一分钟观察到前臂屈肌的肌电图积分增加。持续收缩后立即出现最大自主收缩下降。观察到的SEPs变化可能归因于由于运动任务导致的感觉信息和运动指令的可能变化。
