There was 81 muscle paralysis in 25 patients,Which positive potential prolonged was 66(81.3%) and positive potential shortened was 7(9.30%.) during light contraction. There was no voluntary potential in 5 muscles and normal MUP in 3 muscles.

• 25例病人共有81块肌肉瘫痪,其中66块时限延长,呈神经原性损害,7块时限缩短,为肌原性损害的表现,5块运动单元电位正常,3块未引出波形。