Conventional and Quantitative Electroencephalography in Psychiatry

Abstract

Electrical activity of each brain region is homeostatically regulated, resulting in predictable frequency composition of the background EEG. Replicated normative databases have established that the EEG power spectrum is independent of ethnic background. Artifact-free EEG evaluated relative to such norms displays few deviant values in healthy, normally functioning individuals. In subjects with psychiatric disorders, high proportions of abnormal findings have been reported with good concordance and high specificity and sensitivity across numerous studies, distinctive within a wide variety of disorders and often contributing to differential diagnosis and selection of treatment. New three-dimensional QEEG imaging methods offer an economical alternative to other functional brain imaging modalities.

EEG Biofeedback as a Treatment for Substance Use Disorders: Review, Rating of Efficacy and Recommendations for Further Research

“…Peniston and Kulkosky (1991) reported effective treatment of PTSD using a protocol similar to the one they employed for alcoholics. Hughes and John (1999) reviewed the applicability of qEEG findings in SUD. They noted that in numerous qEEG studies there is a consensus of increased beta relative power in alcoholism and increased alpha in cannabis and crack cocaine users.…”

EEG changes and serum anticholinergic activity measured in patients with delirium in the intensive care unit

“…Outside the ICU environment, electroencephalography (EEG) is considered to be a reliable technique for diagnosing delirium [5,6], and quantitative EEG (qEEG) evaluation, in particular, can detect disease and drug-related power density changes in the different frequency bands [7][8][9].…”

EEG frequency and regional properties in patients with paranoid schizophrenia: effects of positive and negative symptomatology pre­valence

“…Полученные с использованием модели преобладания позитивных/негативных расстройств результаты (усиле-ние γ-, ослабление α-ритма и усиление частот β-γ-диапазонов) согласуются с данными литературы [1,2] о наиболее часто встречающихся изменениях ЭЭГ у боль-ных шизофренией. Выявленные признаки диффузной с преобладанием во фронтальных и задних отделах гипоак-тивации мозга по δ-ритму указывают на более выражен-ную дисфункцию этих отделов по сравнению с остальны-ми зонами коры.…”

“…ным спектрального анализа ЭЭГ покоя [1,2], наиболее верифицированными и общими изменениями при этом заболевании считаются усиление низких частот (δ-, θ-ритмы), ослабление α-и усиление β-ритма.…”