j患者男,49岁.于入院前2小时,因恶心自服胃复安20mg,之后出现颈部不自主的阵发性前屈前伸痉挛活动、疼痛、不能旋转和双上肢麻木.经内科诊断后,以“锥体外系综合症”和“胃复安中毒”收住内科.经输液、口服安坦治疗后,颈部痉挛消失,但颈部疼痛和双上肢麻木症状加重.摄颈椎片示;颈椎生理弧度变直,寰枢椎脱位.转骨伤科先行枕颏带牵引,待寰枢关节复位良好后,给以头颈胸石膏外固定. j patient male, 49 years old. 2 hours before admission, due to nausea and stomach metocloparon 20mg, followed by neck involuntary paroxysmal flexion extension spasm activity, pain, can not rotate and upper limb numbness. After diagnosis, with “extrapyramidal syndrome” and “metoclopramide” admitted to medicine.Transfusion, oral antanan therapy, neck spasm disappears, but the neck pain and upper extremity numbness symptoms worse. Show; cervical physiological curvature straightened, atlantoaxial dislocation .Traumatic orthopedic first pillow chin traction, to be atlantoaxial joint reset well after giving head and neck plaster external fixation.