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Altered states of consciousness: Processed EEG in mental disease

机译：意识状态改变：精神疾病中的脑电图处理

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Due to increasing life expectancy and a rising elderly population in Europe, the incidence of mild cognitive impairment which may predict diseases like Alzheimer's Disease or Vascular Dementia, is rising. Neurophysiological techniques are simple and inexpensive tools for early diagnosis and provide useful and objective correlates of cognitive activity both in normal subjects and patients suffering from the above conditions. Cognitive impairment due to different mental disease is characterized by decreased power and coherence in the alpha/beta band, which suggests functional disconnection among cortical areas, whereas both power and coherence in the delta and theta bands increase as a sign of cortical deafferentation from subcortical structures. Quantification of power and phase relationship by bispectral analysis suggests the Bispectral Index could be a useful but simple tool for early diagnosis of mental disease.
机译：由于预期寿命的增加和欧洲老年人口的增加，轻度认知障碍的发生率正在上升，这可能预示着阿尔茨海默氏病或​​血管性痴呆等疾病。神经生理学技术是用于早期诊断的简单且廉价的工具，并且为正常受试者和患有上述疾病的患者提供了认知活动的有用和客观的关联。不同精神疾病引起的认知障碍的特征在于alpha / beta频段的力量和连贯性下降，这表明皮质区域之间的功能断开，而δ和theta频段的力量和连贯性都增加，这是皮质从皮层下结构脱去迹象的迹象。通过双光谱分析量化功率和相位关系表明，双光谱指数可能是精神疾病早期诊断的有用但简单的工具。

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