我们的实验证明

针刺狗的“人中”穴部位

可以较稳定地引起胃运动的抑制及外周5-羟色胺(5-HT)含量下降

胃窦部嗜铬细胞5-HT 含量增多。“人中”是接受面神经及眶下神经分支所支配

其神经传入都进入脑干下部并与副交感初级中枢有密切的联系。分析针刺“人中”引起胃运Contractile activity of antrum were recorded by strain gauge for obser- vating effects of stimulation of the caudal brain stem on the gastric antral motility and their roles in the inhibition of antral contraction caused by acu- puncture of acupoint“Renzhong”.The experiments demonstrated that stimulation of raphe nuclei in the medulla called increase in the antral contraction.On the contrary

stimulation of ventrolateral medulla

where noradrenergic neurons are

produced inhibition of both frequency and amplitude of antral motility. It is suggested that the ventrolateral medulla may be responsible for the inhi- bition of gastric antral motor activity elicited by acupuncture of“Renzhong”

because their lesion resulted in withdraw of its acupuncture inhibiton. Monoaminergic descending termination from the caudal brain stem in primary sympathetic and parasympathetic centers and their functions in the modulation of gastric motility have been also discussed in the present paper.