“体表与内脏相关”是针灸学一个基本理论

它指导着针灸的取穴和内脏疾患的诊断。现代医学也越来越重视这一课题

Ama-ssion 和 Langhof 等曾以体感皮层诱发电位为指标证明躯体传入可抑制内脏传入

Selzer

Hancock 等曾报导躯体传入Experiments were performed on 32 cats under chloralose and flaxedil.The A fider and AC fiber of splanchnic nerve (SPN) and peroneal nerve (PN) were stimulated with electric pnlses of different strength.The unit discharges were recorded with glass microelectrode in the contralateral somato-sensory cortex

and proceeded with microcomputer using stochostic point process signal analysis method.The normalized cross-eovariance function (NCCVF) is used to analyse the spikes. NCCVF of the cortical unit discharges evoked by peroneal and splanchnic nerve input expressed a first positive component followed by a negative com- ponent.The latency and the duration of the first positive component of NCCVF of SP-ED (the unit discharges evoked by splanchnic nerve input) were longer than that of P-ED (the discharges evoked by peroneal nerve input)

and the amplitude was lower. When PN and SPN were stimulated simulanteously

P-ED appeared alone

but no SP-ED.SP-ED was depressed

while the SPN was stimulated after the stimulation of PN

and P-ED was inhibited while the PN was stimulated after the stimulation of SPN.The inhibition of the peroneal input on the splanchnic one was more powerful than that of splanchnic input on peroneal one.The longer the interval between these two stimulations

the lesser the inhibition. The unit discharges evoked by AC fiber input was more difficultly inhibited than that by A fiber input alone. It was suggested that the superficial somatic and the splanchnic inputs mi- ght inhibit each other in central nervous system.The preceding input reaching the cerebral cortex might inhibit the later one.This inhibition was related to the type of nerve fiber and to the intervals between two stimulations.