Method 28 male SD rats were randomly and equally divided into: control group (C),tail suspended group (S),IHUT 2 h group (H2),and IHUT 4 h group (H4).

• 方法SD雄性大鼠 2 8只 ,按体重配对后随机等分为 :对照组 (C) ,悬吊组 (S) ,2h头高位组 (H2 )和 4h头高位组 (H4) ,每组 7只。