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Titolo:
EEG power, frequency, asymmetry and coherence in male depression
Autore:
Knott, V; Mahoney, C; Kennedy, S; Evans, K;
Indirizzi:
Univ Ottawa, Royal Ottawa Hosp, Dept Psychiat & Psychol, Ottawa, ON, Canada Univ Ottawa Ottawa ON Canada Dept Psychiat & Psychol, Ottawa, ON, Canada Mental Hlth Res Inst, Ottawa, ON, Canada Mental Hlth Res Inst Ottawa ON Canada Hlth Res Inst, Ottawa, ON, Canada Univ Toronto, Dept Psychiat, Clarke Inst Psychiat, Toronto, ON, Canada Univ Toronto Toronto ON Canada Clarke Inst Psychiat, Toronto, ON, Canada Boehringer Ingelheim Canada Ltd, Burlington, ON, Canada Boehringer Ingelheim Canada Ltd Burlington ON Canada lington, ON, Canada
Titolo Testata:
PSYCHIATRY RESEARCH-NEUROIMAGING
fascicolo: 2, volume: 106, anno: 2001,
pagine: 123 - 140
SICI:
0925-4927(20010410)106:2<123:EPFAAC>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; POSITRON EMISSION TOMOGRAPHY; MAJOR DEPRESSION; QUANTITATIVE EEG; NEUROLOGICAL DISORDERS; PSYCHIATRIC-DISORDERS; UNIPOLAR DEPRESSION; GENDER DIFFERENCES; AFFECTIVE STYLE; BRAIN;
Keywords:
depression; electroencephalography; power; frequency; coherence; hemispheric asymmetry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
79
Recensione:
Indirizzi per estratti:
Indirizzo: Knott, V Univ Ottawa, Royal Ottawa Hosp, Dept Psychiat & Psychol, 1145 Carling Ave,Ottawa, ON, Canada Univ Ottawa 1145 Carling Ave Ottawa ON Canada Ottawa, ON, Canada
Citazione:
V. Knott et al., "EEG power, frequency, asymmetry and coherence in male depression", PSYCH RES-N, 106(2), 2001, pp. 123-140

Abstract

Quantitative electroencephalographic (EEG) power topography has served as a useful tool for investigating brain regional mechanisms underlying affective disorders. In an attempt to examine the role of gender and widen the scope of the measurement probes used in these investigations, the traditionalpower and inter-hemispheric power ratio indices were supplemented with intra-hemispheric power ratios, mean frequency and both inter and intra-hemispheric coherence indices. in the comparison of depressed male patients and healthy controls. Resting (eyes closed), vigilance controlled EEG recordingsfrom 21 scalp sites were collected from 70 male, unmedicated, unipolar major depressive disorder outpatients and 23 normal control male subjects. Absolute and relative power, frequency, asymmetry and coherence measures derived from spectrally analyzed EEGs were subjected to univariate analyses for group comparisons as well as to discriminant function analysis to examine their utility as classification indices. Compared with controls, patients evidenced greater overall relative beta power and, at bilateral anterior regions, greater absolute beta power and faster mean total spectrum frequency. Inter-hemispheric alpha power asymmetry index differences were noted, with controls exhibiting relatively reduced left hemisphere activation, and widespread reduced delta, theta, alpha and beta coherence indices. Whereas intra-hemispheric theta power asymmetry reduction was exhibited in patients bilaterally at all regions, group differences with intra-hemispheric beta power asymmetry were unilateral, being restricted to the right hemisphere. Discriminant analysis correctly classified 91.3% of the patients and controls. Quantitative EEG measurements in male depression appear to describe a pattern of aberrant inter-hemispheric synchrony/asymmetry and a profile of frontal activation. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 25/01/20 alle ore 18:56:18