The neurophysiological time pattern of illusionary visual perceptual transitions: a simultaneous EEG and fMRI study

Müller, TJ; Federspiel, A; Horn, H; Lövblad, K; Lehmann, C; Dierks, T; Strik, WK (2005). The neurophysiological time pattern of illusionary visual perceptual transitions: a simultaneous EEG and fMRI study. International journal of psychophysiology, 55(3), pp. 299-312. Amsterdam: Elsevier 10.1016/j.ijpsycho.2004.09.004

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Several divergent cortical mechanisms generating multistability in visual perception have been suggested. Here, we investigated the neurophysiologic time pattern of multistable perceptual changes by means of a simultaneous recording with electroencephalography (EEG) and functional magnetic resonance imaging (fMRI). Volunteers responded to the subjective perception of a sudden change between stable patterns of illusionary motion (multistable transition) during a stroboscopic paradigm. We found a global deceleration of the EEG frequency prior to a transition and an occipital-accentuated acceleration after a transition, as obtained by low-resolution electromagnetic tomography analysis (LORETA) analysis. A decrease in BOLD response was found in the prefrontal cortex before, and an increase after the transitions was observed in the right anterior insula, the MT/V5 regions and the SMA. The thalamus and left superior temporal gyrus showed a pattern of decrease before and increase after transitions. No such temporal course was found in the control condition. The multimodal approach of data acquisition allows us to argue that the top-down control of illusionary visual perception depends on selective attention, and that a diminution of vigilance reduces selective attention. These are necessary conditions to allow for the occurrence of a perception discontinuity in absence of a physical change of the stimulus.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > UPD Murtenstrasse 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychiatric Neurophysiology [discontinued] 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Management
UniBE Contributor:	Müller, Thomas (A), Federspiel, Andrea, Horn, Helge Joachim, Lehmann, Christoph, Dierks, Thomas, Strik, Werner
ISSN:	0167-8760
ISBN:	15708643
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:55
Last Modified:	29 Mar 2023 23:33
Publisher DOI:	10.1016/j.ijpsycho.2004.09.004
PubMed ID:	15708643
Web of Science ID:	000227369300004
URI:	https://boris.unibe.ch/id/eprint/23317 (FactScience: 41280)