病例:男,18岁,吴县人。1987年8月因左上下肢不灵活9个月,复视、言语含糊3个月入院。病人开始感左上下肢欠灵活,右睑裂变小。1987年夏加剧。左上肢震颤,无头昏、头痛、发热、抽搐等症状。为第一胎顺产。无外伤及神经疾病史。16岁前学习成绩良好。父母两系无神经系疾患。入院检查:意识清,发 Case: Male, 18 years old, Wuxian. In 1987 August due to left upper limbs are not flexible for 9 months, diplopia, verbal ambiguity 3 months admission. The patient began to feel left upper limb less flexible, right lower palpebral fissure small. The summer of 1987 intensified. Left upper limb tremor, no dizziness, headache, fever, convulsions and other symptoms. As the first child of birth. No history of trauma and neurological diseases. Good grades before 16 years old. Parents of two lines without neurological disorders. Admission examination: consciousness, hair