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利用电子计算机平均叠加技术在40例家兔上记录到一侧颈迷走神经(CVN)传入冲动投向两侧大脑皮层的躯体-内脏感觉区,并呈现一个范围约为4×4mm~2的迷走神经-诱发电位(VEP)中心区。刺激强度由弱到强可以相继使CVN内的不同纤维(A_β、A_δ和C)兴奋,同时可在皮层上记录到相应的不同传导速度的三类诱发电位即A_β-VEP、A_δ-VEP和C-VEP。其中A_δ-VEP和C-VEP不被阳极电流阻滞,但可被普鲁卡因浸润所减弱。电针可以抑制这种反映内脏信息的VEP,抑制性质是速升速降的。推测这是针刺和迷走神经两种传入信息在CNS内相互作用的结果
A computer-aided average superimposition technique was used to record the somatic-visceral sensory area of one side of the vagal afferent (CVN) afferent impulses on both sides of cerebral cortex in 40 rabbits and present a vagal- Evoked potential (VEP) center. Stimulation intensity from weak to strong could successively excite different fibers in CVN (Aβ, Aδ and C), at the same time, three kinds of evoked potentials corresponding to different conduction velocities (A_β-VEP, A_δ-VEP and C -VEP. Among them, A_δ-VEP and C-VEP were not blocked by the anodic current, but could be weakened by procaine infiltration. Electroacupuncture can inhibit this VEP that reflects visceral information, and its inhibitory property is rapid decline. Presumably this is the result of the interaction between the two incoming messages of acupuncture and vagus nerve within the CNS