| Ambiguous figures and binding: EEG frequency modulations during multistable perception. | |
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MedLine Citation:
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PMID: 20796247 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Ambiguous figures induce sudden transitions between rivaling percepts. We investigated electroencephalogram frequency modulations of accompanying change-related de- and rebinding processes. Presenting the stimuli discontinously, we synchronized perceptual reversals with stimulus onset, which served as a time reference for averaging. The resultant gain in temporal resolution revealed a sequence of time-frequency correlates of the reversal process. Most conspicuous was a transient right-hemispheric gamma modulation preceding endogenous reversals by at least 200 ms. No such modulation occurred with exogenously induced reversals of unambiguous stimulus variants. Post-onset components were delayed for ambiguous compared to unambiguous stimuli. The time course of oscillatory activity differed in several respects from predictions based on binding-related hypotheses. The gamma modulation preceding endogenous reversals may indicate an unstable brain state, ready to switch. |
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Authors:
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Werner Ehm; Michael Bach; Jürgen Kornmeier |
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Publication Detail:
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Type: Journal Article Date: 2010-08-26 |
Journal Detail:
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Title: Psychophysiology Volume: 48 ISSN: 1540-5958 ISO Abbreviation: Psychophysiology Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0142657 Medline TA: Psychophysiology Country: United States |
Other Details:
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Languages: eng Pagination: 547-58 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Society for Psychophysiological Research. |
Affiliation:
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Institute for Frontier Areas of Psychology and Mental Health, Freiburg, Germany Universitäts-Augenklinik, Freiburg, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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