PMID: 3751669Jun 1, 1986Paper

Topography and possible physiological significance of EEG amplitude variability in psychosis

Acta Psychiatrica Scandinavica
H F MüllerA Buchbinder

Abstract

The topography and possible physiological significance of EEG average amplitude and amplitude variability in time were examined in 10 chronic psychotic patients and several groups of healthy volunteers. In confirmation of previous reports, the patients showed more slow (5.2-7.6 Hz) activity, particularly in frontal areas, and less alpha rhythm variability in posterior areas, compared to matched controls, chiefly during the resting state, while eye opening, and particularly structural sensory input, made the groups more similar. The same two EEG variables showed significant correlations with ratings of psychopathology, in the expected direction. The EEG amplitude variability is increased by unstructured perception, probably as an expression of readiness or search for structures in the input, and shows persistent topographic patterns over time in individuals. It appears to reflect a functional dimension which is different from the one represented by the average amplitude and is one of several spontaneous oscillatory functions which are diminished in chronic psychosis, perhaps as consequence of prefrontal malfunction. The results suggest a diminished guiding function by the anterior cortex, and a diminished readiness for perceptio...Continue Reading

References

May 1, 1985·Acta Psychiatrica Scandinavica·H F Müller
Oct 1, 1965·Electroencephalography and Clinical Neurophysiology·L GoldsteinC C Pfeiffer
Jan 1, 1968·Electroencephalography and Clinical Neurophysiology·G MarjerrisonR P Keogh
Jan 1, 1966·Acta Psychiatrica Scandinavica·J VolavkaJ Roubícek
Oct 1, 1983·Electroencephalography and Clinical Neurophysiology·R MorstynR W McCarley
Feb 1, 1981·Acta Psychiatrica Scandinavica·E Hoffmann, L Goldstein

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Citations

Mar 1, 1989·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·C ColomboS Scarone
Jul 17, 1998·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·V V Lazarev
Dec 28, 2007·Schizophrenia Research·Nash N BoutrosWilliam Iacono
Aug 15, 1991·Biological Psychiatry·A ConvitJ Volavka
Jan 8, 2015·Frontiers in Human Neuroscience·Tomas RosPatrik Vuilleumier
Jan 7, 2017·Clinical EEG and Neuroscience·Vera A Grin-YatsenkoJuri D Kropotov
Oct 17, 2003·Clinical EEG (electroencephalography)·Mitsuru KikuchiYoshifumi Koshino

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