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眩晕是一种运动幻觉,患者主观感觉到环境或自身呈旋转式运动或摆动式运动。多数患者诉说环境、房屋、门窗在旋转,或说天地倒转。眩晕时还伴有呕吐、恶心、眼球震颤、头痛和站立不稳等症状。有些病人特别是有些老年人诉说头晕眼花和有一种不稳定的感觉,这主要是大脑轻度缺血引起,躺下后有所好转,严重的脑缺血可引起晕厥。这不是真正的眩晕,真正的眩晕是由于前庭系统有病损或受刺激而产生。因此医生
Dizziness is a hallucination of movement in which the patient subjectively perceives the environment or itself to be rotational or oscillating. Most patients tell the environment, housing, doors and windows in rotation, or that heaven and earth reversed. Vertigo is also accompanied by vomiting, nausea, nystagmus, headache and standing instability and other symptoms. Some patients, especially some elderly people complain dizzy and have a feeling of instability, mainly caused by mild ischemia in the brain, after lying down to be better, severe cerebral ischemia can cause syncope. This is not true dizziness, the real vertigo is due to the vestibular system is damaged or irritated and produce. So doctor