To observe the effect of Buyang Huanwu Decoction (BYHWD) on axon regeneration and functional recovery of the animal after spinal cord injury ( SCI), SD rats were given BYHWD or distilled water via gastrogavage after right rubrospinal tract (RST) transection at the level between C3 and C4. Eight weeks after treatment, the axon regeneration was examined by BDA anterograde tracing technique, and functional recovery was studied by a test of forelimb usage during spontaneous vertical exploration. The results showed that there were a few BDA la...