周波数変調脈波刺激による伸展反射(<特集>脳と神経の研究V)

概要

論文の詳細を見る
Frequency modulating pulses (three electrical pulses), which was similar to the pattern of GIa discharges elicited by phasically stretched muscle, were applied to GIa afferent fibers and monosynaptic reflexes were evoked. When the intencities of these pulses were respectively subthreshold with respect to reflex response, monosynaptic reflex spike was elicited in ventral root after these pulses. The interval constant from decreasing rate of the pulse intervals was obtained. 1. The larger interval constant of the pulses, the longer the reflex time until the appearance of the ventral root spike potential became. The relation between interval constant and reflex time is proportional and the ratio resulted in 0.24±0.05 (msec/msec). 2. The EPSPs which were produced to correspond to each pulses summated temporarily and the cell fired when the depolarization reached to the critical threshold level. The larger the interval constant, the later the depolarization reached to the critical level, because the efficiency of EPSPs summation gets less effective. 3. The reason why the successful data were difficult to get in this manner in cats could be attributed to the fact that the inhibitory action of GIb and GII volleys might be activated by applying electrical pulses to the nerve, eventhough the intencities were controlled among seemingly GIa threshold. The motoneurone which fired successfully to these frequency modulating stimulation, seems to be tonic ones. 4. The relation between interval constant and reflex time resulting from H-wave of monkey is proportional, and the ratio 0.23 (msec/msec) is similar to the cat's one.
千葉大学の論文

周波数変調脈波刺激による伸展反射(<特集>脳と神経の研究V)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク