患者,女,61岁,因“头晕、头部麻胀感二月”于2010年3月10日就诊于我院神经内科门诊。患者2个月前无明显诱因开始出现头晕,无视物旋转,无视物成双,与体位变化无关,并伴有头部麻胀感,无头痛,无恶心及呕吐,无四肢活动及感觉异常,无走路不稳,无发热,二便无失禁。自患病以 Patients, female, 61 years old, because of “dizziness, head swelling feeling February ” on March 10, 2010 visit our hospital neurology clinic. Patients 2 months ago no obvious incentive to start dizziness, ignoring the object rotation, ignoring the object in pairs, and has nothing to do with the position changes, accompanied by head swelling feeling, no headache, no nausea and vomiting, no limb activity and sensory abnormalities, No walking instability, no fever, two no incontinence. Since the illness