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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;;

Received: 　　Accepted:

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Citing This Article：

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).