哥哥,15岁。出生10个月时出现右侧肢体发作性无力,肌肉松弛,肌张力低下,伴眼睛向左偏斜及眼球震颤,入睡后消失,发作持续4~5d,每月发作2~4次,3~14岁间未再发作。2004年9月,患者再次发作右侧肢体无力,就诊于我院。查体:右上肢肌力Ⅴ-级,右手肌力Ⅲ~Ⅳ级,握笔写字困难,右上肢肌张 My brother, 15 years old. 10 months of age at the time of the emergence of the right limb seizure weakness, muscle relaxation, low muscle tension, with left eye deflection and nystagmus, falling asleep disappear after the attack lasted 4 ~ 5d, 2 to 4 episodes per month, 3 ~ 14-year-old no recurrence. In September 2004, the patient again episode of weakness in the right limb, treatment in our hospital. Physical examination: the right upper limb muscle strength Ⅴ - level, right hand muscle Ⅲ ~ Ⅳ level, difficulty writing pen, right upper limb muscle