A series of experiments were carried out on the spinal rats (including therats with the spinal cord hemi-transected dorsally) for investigating the spinalmechanism of acupuncture analgesia. The results are as follows: 1. In various spinal animals

needling certain acupoints may obtain signi-ficant analgesic effects. One or seven days after transection

the acupuncture-induced analgesic effect expressed with the tail flick latency was 39. 0% or62. 3% of that obtained in the intact rats. It suggests that the spinal segme-ntal inhibition migkt play an important role in AA.