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电All激大鼠外侧疆核对延髓甩尾相关细胞的活动和甩尾反射的影响

黄洛秀, 程珍风

(西安医科大学生理教研室，西安710061)

摘要

在浅麻醉大鼠上，在延髓腹内侧结构内观察到三种具有不同放电类型的细胞，即甩尾前放电骤停的撤反应细胞、甩尾前放电骤增的给反应细胞和甩尾无关的中性细胞。电刺激外侧M核可抑制撤反应细胞的自发放电，加强给反应细胞自发放电，从而易化两类细胞的甩尾相关反应，同时易化伤害刺激引起的甩尾反射。实验结果说明，外侧僵核对节段性防御反射有易化作用，这种易化作用可能是通过延髓内撤反应和给反应细胞的协同活动而实现的。

关键词： 外侧组核; 延髓头端腹内侧结构; 甩尾相关神经元; 甩尾反射; 下行易化作用

INVOLVEMENT OF MEDULLARY TALK-FLICK RELATED NEURONS IN THE DESCENDING FACILITATING EFFECTEVOKED BY STIMULATION OF LATERAL HABENULAR NUCLEUSS

HUANG LUO-XIU, CHENG ZHEN-FENG

(Department of Physiology, Xi' an Medical University, Xian 710061)

Abstract

In lightly anesthetized rats 3 classes of neurons in the rostral ventromedial medull(RVM) were in relation to tail-flick reflex (TF) recorded，i. e. the TF triggired oncells，the TF triggered off-cells and the non-responsive or neutral cells. When lateral habenular nucleus (LHb) was stimulated the on一cells were excited，the off-cells inhibit-
ed while the neutral cells unaffected. The fact that stimulation of LHb facilitated tailflick reflex appears to be quite well explained by its enhancement effect on the tail-flick related response of both the on- and the off-cells. These results indicate that the facilitating action of LHb on spinal defensive reflex is probably brought out by participation
of the medullary tail-flick related cell activity.

Key words: lateral habenular nucleus;rostral ventromedial medulla;Tail-flick related neuron;;

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引用本文：

黄洛秀, 程珍风. 电All激大鼠外侧疆核对延髓甩尾相关细胞的活动和甩尾反射的影响[J]. 生理学报 1996; 48 (4): .

HUANG LUO-XIU, CHENG ZHEN-FENG. INVOLVEMENT OF MEDULLARY TALK-FLICK RELATED NEURONS IN THE DESCENDING FACILITATING EFFECTEVOKED BY STIMULATION OF LATERAL HABENULAR NUCLEUSS . Acta Physiol Sin 1996; 48 (4): (in Chinese with English abstract).