It was also showed that the P14 PL and P9?P14 and N13?P14 IPL of median SEP were delayed in 5/9 , 6/9 and 8/9 patients, respectively.

• 常规法测量正中神经SEP ,5例患者P14PL延长 ,6例患者P9 P14IPL延长 ,8例患者N13 P14IPL延长 ;