患儿女8岁,因发作性发笑伴意识丧失6个月入院,患儿半年前开始出现突发活动终止、做笑脸并发出笑声,同时意识丧失,凝视,持续8～10秒.无发热及肢体抽搐,常在胸痒和强迫做出笑样表情后发作,停止后无嗜睡及头昏头痛现象,每日1～3次,服用癫键安后发作渐频,且有情绪激动.入院前2月每日发作达8～10次,出现点头、下蹲与直立交替动作及 Children 8 years old, due to paroxysmal amnesia with loss of consciousness 6 months admitted to hospital, children began to appear half a year ago, abrupt termination of activities, make a smile and laughter, loss of consciousness, gaze, sustained 8 to 10 seconds. And limbs convulsions, often in the chest itch and forced to make laugh kind of expression after the attack, no lethargy and dizziness headache after stopping the phenomenon 1 to 3 times a day, taking epileptic seizures episodes episodes of frequency and emotionally. In February before the onset of up to 8 to 10 times a day, nodded, squat and upright alternate action and