论文部分内容阅读
实验在麻醉、制动和人工通气的家兔上进行。用串长3_s的方波脉冲(100 Hz,0.3～0.5 ms,100～300μA)刺激下丘脑近中线区(A_1～P_2,RL0.5～1.0,H-3～-5范围内)引起血压升高与瞳孔散大等反应。在延髓从闩向前,0～3.5 mm,中线旁开2.5～3.0 mm的范围内,将玻璃微电极从背侧面插入,记录自发放电单位的活动,并观察刺激下丘脑对这些单位活动的影响。在12只家兔中记录了190个自发放电单位,其中44个为血压相关单位。根据它们对刺激下丘脑时放电频率的变化,可分成两种类型。第一型(n=19),在刺激下丘脑时放电频率增加;第二型(n=25),在刺激下丘脑时放电频率减少。44个血压相关单位主要集中于延髓的腹外侧区域中
Experiments were performed on anesthetized, braked and ventilated rabbits. The stimulation of hypothalamic near-midline area (A_1 ~ P_2, RL0.5 ~ 1.0, H-3 ~ -5) with square wave pulses (100 Hz, 0.3 ~ 0.5 ms and 100 ~ 300 μA) High and mydriasis and other reactions. In the medulla oblongata from the latch to the front, 0 ~ 3.5 mm, midline open 2.5 ~ 3.0 mm range, the glass microelectrode inserted from the dorsal side, recording spontaneous discharge unit activity, and observe the stimulation of the hypothalamus on these unit activity . 190 spontaneous discharge units were recorded in 12 rabbits, of which 44 were blood pressure related units. According to their stimulation of hypothalamic discharge frequency changes can be divided into two types. Type 1 (n = 19) increased the discharge frequency during stimulation of the hypothalamus; type 2 (n = 25) decreased the frequency of discharge during stimulation of the hypothalamus. Forty-four blood pressure-related units are mainly concentrated in the ventrolateral region of the medulla oblongata