▪失语症急性或亚急性表现w相对固定的缺陷 - 结构性脑病理▪缺血性中风是最常见的,其他包括出血性中风,肿瘤,肿瘤,脑脓肿,脑炎,脑炎或其他CNS感染,脑损伤,脑部损伤,造成多种神经降解症和抗刺激性• Transient- TIA, migraine, seizure (aphasia may be an ictal phenomenon- speech arrest at onset of a complex partial or secondary generalized seizure or a post ictal manifestation) ▪ Primary progressive aphasia (PPA) and semantic dementia are syndromes- older adults- a group under Frontotemporal dementia, (less common Alzheimer's dementia), Creutzfeldt-Jacob病(Prion)