THE SIMULTANEOUS DISCHARGES OF TWO NEURONS IN N. Pf AND RF AND THE INFLUENCES ON THEM BY STIMULATING CENTRAL GRAY MATTER

This paper employs the method of simultaneous recording of the electric discharges oftwo neurons with two microelectrodes to study the interrelationship of simultancous electricactivities of pain excitation neurons (PEN) and pain inhibition neurons (PIN) in N. parafas-cicularis (Pf) of thalamus and reticular formation (RF) of midbrain in 42 rats. The resultsprove: (i) There are both PEN and PIN in RF in midbrain and they act coordinately;(ii) noxious messages may simultaneously act on PEN and PIN in N. Pf and RF, and thereciprocal coordination of electric activities of these two kinds of neurons is very obvious;(iii) stimulating central gray matter or injecting morphine may weaken the activities ofPEN simultaneously, with the opposite effects on PIN.     

丘脑束旁核和中脑网状结构中两个神经元同时放电及刺激中央灰质对其影响

本文在42只大白鼠上,用两只微电极同时引导两个神经元放电的方法,研究了丘脑束旁核和中脑网状结构中痛兴奋和痛抑制神经元同时电活动的规律.结果证明:1.中脑网状结构中痛兴奋和痛抑制神经元是同时存在和活动的;2.伤害性信息可同时作用于束旁核和网状结构中痛兴奋和痛抑制神经元,两类神经元的电活动有明显的相互配合现象;3.刺激中央灰质或注射吗啡可同时使两核团中痛兴奋神经元活动减弱和痛抑制神经元活动加强。