Hanslmayr, Simon and Aslan, Alp and Staudigl, Tobias and Klimesch, Wolfgang and Herrmann, Christoph S. and Baeuml, Karl-Heinz (2007) Prestimulus oscillations predict between and within subjects. NEUROIMAGE, 37 (4). pp. 1465-1473. ISSN 1053-8119,
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In the present study, the electrophysiological correlates of perceiving shortly presented visual stimuli are examined. In particular, we investigated the differences in the prestimulus EEG between subjects who were able to discriminate between four shortly presented stimuli (Perceivers) and subjects who were not (Non-Perceivers). Additionally, we investigated the differences between the subjects perceived and unperceived trials. The results show that Perceivers exhibited lower prestimulus alpha power than Non-Perceivers. Analysis of the prestimulus EEG between perceived and unperceived trials revealed that the perception of a stimulus is related to low phase coupling in the alpha frequency range (8-12 Hz) and high phase coupling in the beta and gamma frequency range (20-45 Hz). Single trial analyses showed that perception performance can be predicted by phase coupling in the alpha, beta and gamma frequency range. The findings indicate that synchronous oscillations in the alpha frequency band inhibit the perception of shortly presented stimuli whereas synchrony in higher frequency ranges (>20 Hz) enhances visual perception. We conclude that alpha, beta and gamma oscillations indicate the attentional state of a subject and thus are able to predict perception performance on a single trial basis. (C) 2007 Elsevier Inc. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TOP-DOWN; VISUOSPATIAL ATTENTION; PHASE SYNCHRONIZATION; SELECTIVE ATTENTION; ALPHA OSCILLATIONS; VISUAL-ATTENTION; CORTICAL AREAS; EEG; POWER; PERFORMANCE; EEG; oscillations; prestimulus; phase coupling; perception; alpha |
| Subjects: | 100 Philosophy & psychology > 150 Psychology |
| Divisions: | Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie IV (Entwicklungs- und Kognitionspsychologie) - Prof. Dr. Karl-Heinz Bäuml |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2020 10:38 |
| Last Modified: | 01 Dec 2020 10:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32169 |
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