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跌倒发作(Drop attack DA)其定义为:明显地不是由于下肢失灵,体位改变或头部运动以及不伴有眩晕或其它头部的异常感觉的无先兆及无意识丧失的反复跌倒。在诊断DA时必须除外的是:DA是由于跌倒,晕厥,直立性低血压,头晕,眩晕,心血管障碍,脑血管疾病,痴呆,痫性发作,锥体外系损伤及原发性步态障碍所致。药物,如镇静剂,降压药,精神安定药等也可是DA的诱因或同时与上述提到的一种或多种病因共同造成DA。此外,症状性DA见于隐性恼积水,幕上或幕下不同类型脑瘤,脑干压迫性损伤,第三脑室胶体囊肿或脑膜瘤,本文作者报道2例由于甲状腺机能减退导致的DA。
Drop attack DA is defined as a repetitive fall without aura and unconsciousness that is not apparently due to lower limb disability, altered body posture or head movement, and an absence of dizziness or other abnormal sensations in the head. DA must be excluded from the diagnosis of DA because of falls, syncope, orthostatic hypotension, dizziness, dizziness, cardiovascular disorders, cerebrovascular disease, dementia, seizures, extrapyramidal injuries, and primary gait disorders Due. Drugs such as sedatives, antihypertensives, neuroleptics and the like may also be causes of DA or at the same time cause DA together with one or more of the above-mentioned causes. In addition, symptomatic DA seen in the hidden annoyance water, supratentorial or different types of brain tumors, cerebrocampal compression injury, third ventricle colorectal cyst or meningioma, the authors reported in 2 cases due to hypothyroidism caused DA.