Similar result could be obtained by cutting the dorsal roots of several neighboring segments.A small VSR could be obtained in one isolated segment of spinal cord with intact dorsal and ventral roots.

• 是不论切断同节段背根或其他节段背根，只要保留一部分节段的内脏传入，即可记录到VSR，但幅度减小，潜伏期延长。