Visible and non-visible EEG changes demonstrated by spectral parameter analysis

Electroencephalography and Clinical Neurophysiology
A IsakssonA Wennberg

Abstract

A change of the heart rate in patients with complete AV-block and externally controllable cardiac pace-makers was earlier shown to influence cerebral function, as measured by psychological tests. To determine whether this influence manifests itself in the EEG, 9 patients aged 43-83 years were examined, all having complete AV-block and externally controllable pace-makers. Their EEGs were recorded at different heart rates between 40 and 100/min at rest and during a mental arithmatic test. The EEG record was evaluated visually and analysed by means of Spectral Parameter Analysis (SPA), introduced by Zetterberg (1969). The changes in the spectral parameters in relation to the heart rates were analysed statistically, In several cases significant changes appeared but the interindividual variations were large. Certain typical patterns could, however, be observed and their importance as a measure of cerebral function due to changes in the cerebral blood flow are discussed. These EEG changes revealed through SPA did not correspond to any visually observable changes in the EEG records. Differences in the spectral parameters between rest and test situations were analysed. Some of the differences found could easily be observed by visual in...Continue Reading

References

Jan 1, 1975·Electroencephalography and Clinical Neurophysiology·A Isaksson, A Wennberg
Oct 1, 1975·Electroencephalography and Clinical Neurophysiology·A Isaksson, A Wennberg
Nov 1, 1971·Electroencephalography and Clinical Neurophysiology·A Wennberg, L H Zetterberg
May 31, 1974·Kybernetik·F H Lopes da SilvaL H Zetterberg
Jan 1, 1968·Experimental Brain Research·J Freeman, D H Ingvar
Nov 1, 1957·Electroencephalography and Clinical Neurophysiology·A C MUNDY-CASTLE
Oct 1, 1964·The American Journal of Cardiology·P SAMETD A NATHAN
Apr 1, 1962·Circulation Research·D E MILLERH D McINTOSH
Nov 1, 1951·Electroencephalography and Clinical Neurophysiology·A C MUNDY-CASTLE

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Citations

Oct 1, 1979·Journal of Neurology·E J ColonR de Graaf
Oct 1, 1980·Electroencephalography and Clinical Neurophysiology·K A SotaniemiT E Hokkanen
Sep 1, 1989·British Journal for the History of Science·D Barker
Nov 30, 1976·Pflügers Archiv : European journal of physiology·G Pfurtscheller
Jan 1, 1991·Developmental Medicine and Child Neurology·S A Jernigan, L M Ware
Oct 1, 1985·Clinical EEG (electroencephalography)·C M EpsteinA H Ragab

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