Method:Sixty-four healthy SD rats were divided into 4 equal groups randomly:bBE supplied through subarachnoid cavity,NS supplied through subarachnoid cavity,bBE supplied through abdomen cavity,NS supplied through abdomen cavity.

• 方法:健康SD大鼠64只,随机分为硬膜内给牛脑提取液组、硬膜内给生理盐水组、腹腔内给牛脑提取液组、腹腔内给生理盐水组。