患者男,39岁,农民,因头前屈不能抬起伴头昏、四肢乏力10天入院。患者10天前无明显诱因出现颈部发软,头前屈不能自行抬起伴有头昏、四肢乏力。但病程中不伴有发烧、呼吸困难、恶心呕吐。入院查体:神志清楚,体检合作,精神萎靡,瞳孔大小正常,对光反射灵敏,唇无紫绀,颈软,头向前下垂。双肺呼吸音粗,未闻及干湿鸣。心脏(-),腹软,肝脾不肿大,肠鸣音正常。双 Male patient, 39 years old, farmer, because of head flexion can not lift with dizziness, limb weakness 10 days admission. No obvious incentive to patients 10 days ago appeared neck soft, head flexion can not lift themselves accompanied by dizziness, limb weakness. But the course is not accompanied by fever, difficulty breathing, nausea and vomiting. Admission examination: Consciousness, physical examination, apathetic, normal pupil size, sensitivity to light reflex, lip cyanosis, neck soft, sagging head forward. Breath sounds coarse lungs, did not smell and wet and dry Ming. Heart (-), abdominal soft, liver and spleen is not enlarged, normal bowel sounds. double