PMID: 8978442Nov 1, 1996Paper

Working-memory load and dimensional complexity of the EEG

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
G Sammer

Abstract

This investigation shows that a working-memory load induced by a memory scanning task has an effect on nonlinear descriptors of the EEG dynamics. The effect was locally specific above the fronto-temporal (right) cortex and it may be described as a reduction in the dimensional complexity of cortical brain activity. The meaning of the effects seems to differ from that of EEG spectral power, which varied with time during the experiment and not with changes in the working-memory load conditions. Behaviorally controlled over- and underload led to increased variance of the dimensional complexity, thus indicating that dimensional complexity correlates more closely with actual performance than with more general descriptions of brain states. Habitual response speed had an effect at the parietal lead, thus indicating that fast responders reduced their dimensional complexity as the task demand increased. In contrast, the slower responders showed no such definite trend.

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Citations

Dec 3, 2013·Cognitive Neurodynamics·Nasibeh TalebiTim Curran
Apr 8, 2000·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·P KirschR Olbrich
Nov 1, 1996·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·J H Gruzelier
Mar 20, 1998·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·L I AftanasS A Popov
Nov 11, 1999·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·G Sammer
Nov 11, 1999·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·J E Skinner, M Molnár
Nov 11, 1999·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·K Lehnertz
May 29, 1999·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·M Molnár
Jul 15, 2015·Experimental Brain Research·Miodrag StokićMilena Čukić
May 24, 2011·Consciousness and Cognition·Petr Bob, George A Mashour
May 8, 1998·Clinical EEG (electroencephalography)·C J StamR W Keunen
May 17, 2011·The Journal of Animal Ecology·Jan WeslienOlof Widenfalk
Sep 19, 2017·Frontiers in Physiology·Travis J WiltshireJonathan E Butner

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