一位 5 4岁妇女因伸颈性恶心一年就诊。描述颈部活动时便立刻产生恶心。持续约 1～ 2分钟。自幼起乘汽车不能看书 ,乘火车无碍。当快速起床时便感短暂眩晕但无耳鸣或耳胀感 ,无耳聋家族史。眼震描记检查 :未见自发性位置性扭颈或全直性眼震。双耳交替冷热试验显示 8%前庭减低并 A 54-year-old woman presented with a year of sickness due to neck extension. Nausea is described as soon as the neck is described. Lasts about 1 ~ 2 minutes. Since childhood, you can not read a book by car, and it is not harmed by train. When quickly get up and feel short-term dizziness but no tinnitus or ear swelling feeling, no deaf family history. Menstrual examination: no spontaneous positional torsion or all-linear nystagmus. Alternating hot and cold test of both ears showed 8% reduction of vestibule