患儿男 ,4岁 ,因四肢运动障碍 9ｄ于1999年 2月 16日入院。入院前 9ｄ发现患儿双下肢行走无力 ,易跌倒 ,次日双上肢上举无力 ,双手握力减弱 ,四肢呈进行性加重 ,应用青霉素及针灸治疗无好转。无发热 ,饮食及大小便正常。病前 1周曾有上呼吸道感染史。体格检查 :精神可 ,呼吸平 The boy, 4 years old, was admitted to hospital on February 16, 1999 due to dyskinesia 9d. On the 9th day before admission, the children had weakness in walking on both lower extremities and fell easily. On the following day, both upper limbs gave up weakness, their grip strength weakened, and their extremities progressed progressively. Treatment with penicillin and acupuncture did not improve. No fever, normal diet and urine. There was a history of upper respiratory tract infection 1 week before the illness. Physical examination: spirit can be, breathing flat