作者观察了12只猫在不同程度骶神经根受损后刺激胫后神经和腓肠神经诱发的腰髓电位(LP)和皮层电位(CP)的改变。结果发现:S_1神经根受损时,刺激腓肠神经诱发的LP改变最明显,其CP次之;刺激胫后神经诱发的LP改变较小,其CP无显著变化。SEP的改变特征主要表现为波幅下降,而潜伏期无明显变化。 The authors observed changes in lumbar spinal cord potential (LP) and cortical potential (CP) induced by posterior tibial nerve and sural nerve in 12 cats with varying degrees of sacral nerve root injury. The results showed that when the nerve root of S 1 was damaged, the change of LP induced by sural nerve stimulation was the most obvious, followed by CP. The change of LP induced by stimulation of posterior tibial nerve was small, and the CP did not change significantly. The main characteristic of SEP changes is the decrease of amplitude, but there is no obvious change of latency.