Methods 35 adult Waster rats were randomly divided into three groups:normal control group(n=5),root cutting (group A,n=15) and root avulsion (group B,n=15).

• 方法 将35只成年Waster大鼠分为 3组 :正常对照组 (n =5 )、臂丛神经切割伤组 (A组 ,n =15 )、臂丛神经撕脱伤组 (B组 ,n =15 )。