微电泳阿托品削弱脑刺激对束旁核神经元伤害性反应的抑制作用

本文用多管微电极方法，记录大鼠束旁核神经元放电，观察微电泳阿托品时刺激SmⅠ区对Pf神经元伤害性反应的影响，结果表明：1．微电泳导入阿托品同时电刺激SmⅠ区，见到脑刺激对Pf神经元伤害性反应的抑制作用被减弱；2.微电泳导人ACh可明显减弱Pf神经元的伤害性反应。上述结果揭示，ACh可作为神经递质参与皮层下行性痛调制过程。

Iontophoretic Atropine Attenuates the Inhibitory Effect of Stimulating SmI on Nociceptive Responses of pf Neurons

Using the techniques of multimicropipette and iontophoresis, we observed whether ACh was involved in the cortical descending modulation of Pf neurons in rats. It was shown that the inhibition elicited by stimulation of the sensorimotor area (SmⅠ) was attenuated after microiontophretic atropine and that the nociceptive responses of Pf neurons were obviously reduced by microiontophoretic ACh.Therefore, it suggests that ACh may be considered as one of the neurotransmitters involved in the descending modulation of pain