肌梭传入诱发的DRP及对刺激腓神经诱发的DRP、VRP的影响

实验用牛蛙和蟾蜍,以背根电位(DRP)和腹根电位(VRP)为指标,观察分析了牵拉肌肉引起的肌梭传入在中枢的效应。结果表明:肌肉制动后,牵拉半腱肌的同时在背根上所记录到的时相DRP为肌梭传入放电所致,本文命名为肌梭DRP并详细讨论了肌梭DRP的性质。同时发现;持续性肌梭传入能加强电刺激腓神经诱发的DRP,能抑制神经VRP。提示肌梭传入参与针刺镇痛可能是以突触前抑制的形式起作用的。本文为突触前抑制理论及针刺镇痛原理的研究提供了新的资料。

THE DRP EVOKED BY MUSCLE SPINDLE AFFERENTS AND ITS EFFECTS ON THE DRP VRP EVOKED BY STIMULATING N. PERONAEUS

Using the bullforg and toad in experi ments, and making the dorsal root potential (DRP) and ventral rool potential (VRP) as the indexes of the presynaptic inhibition, we examined and analysed the central effects produced by the spindle a fferents during stretching muscle. The results indicat that, aftet muscle paralysis, the phase DRP recorded on dorsal root simultanesously with stretching M. Semitendinosus is produced by spindle afferents, so it is named spindle-DRP'. The characteristic of the spindle-DRP has been discussed in detail. Meanwhile it was found that continual spindle afferents could increase the DRP evoked by electro-stimulating N. peronaeus, can decrease the nerve VRP evoked in this way. These results suggest that the spindle afferents are involved in the acupuncture anaesthesia, perhaps through the presynaptic inhibition. This result may be a new data for the research of the theory of presynaptic inhibition and the principle of acupuncture anaesthesia.