In the 126 motor nerves examined ,prolongation of the distal latency was found in 53.2%,reduction of MVC in 70.6%,F waves abnomality was noted in 92.0%,reduction of SCV in 64.0%,EMG revealed neurogenic changes in 68.4%.

• 上、下肢神经远端潜伏期延长占5 3.；2%25；MCV减慢占 70