Wilson W P, Musella L, Short M J
Contemp Neurol Ser. 1977;15:205-21.
The EEG in normal aging and in dementia due to a variety of diseases has been described. In dementia due to degenerative diseases, metabolic disorders, normal pressure hydrocephalus, and deficiency states, the diffuseness of the abnormalities observed has been emphasized; whereas with cerebrovascular disease and with intracranial massess, the focal nature of the changes has been stressed. Although a normal EEG does not rule out the diagnosis of dementia especially in its early stages, the EECG can nevertheless be a significant instrument in the identification or organic processes when the diagnosis is uncertain, in differentiating diffuse from focal cerebral lesions, and in following the course of the disease. Because electroencephalography is easily performed, is safe, and can be frequently repeated, it should be considered one of the more useful tools in the clinical evaluation of patients with dementia.
正常衰老以及由各种疾病导致的痴呆症患者的脑电图情况已有相关描述。在由退行性疾病、代谢紊乱、正常压力脑积水和营养缺乏状态导致的痴呆症中，所观察到的异常具有弥漫性这一点已得到强调；而对于脑血管疾病和颅内肿块，所强调的则是变化的局灶性。虽然正常脑电图并不能排除痴呆症的诊断，尤其是在其早期阶段，但当诊断不确定时，脑电图在识别器质性病变过程、区分弥漫性与局灶性脑损伤以及跟踪疾病进程方面仍是一种重要手段。由于脑电图检查操作简便、安全且可频繁重复，它应被视为痴呆症患者临床评估中较为有用的工具之一。
