| Processing of affective pictures modulates right-hemispheric gamma band EEG activity. | |
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MedLine Citation:
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PMID: 10576487 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study was designed to test differential hemispheric activation induced by emotional stimuli in the gamma band range (30-90 Hz). Subjects viewed slides with differing emotional content (from the International Affective Picture System). A significant valence by hemisphere interaction emerged in the gamma band from 30-50 Hz. Other bands, including alpha and beta, did not show such an interaction. Previous hypotheses suggested that the left hemisphere is more involved in positive affective processing as compared to the right hemisphere, while the latter dominates during negative emotions. Contrary to this expectation, the 30-50 Hz band showed relatively more power for negative valence over the left temporal region as compared to the right and a laterality shift towards the right hemisphere for positive valence. In addition, emotional processing enhanced gamma band power at right frontal electrodes regardless of the particular valence as compared to processing neutral pictures. The extended distribution of specific activity in the gamma band may be the signature of cell assemblies with members in limbic, temporal and frontal neocortical structures that differ in spatial distribution depending on the particular type of emotional processing. |
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Authors:
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M M Müller; A Keil; T Gruber; T Elbert |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: 110 ISSN: 1388-2457 ISO Abbreviation: Clin Neurophysiol Publication Date: 1999 Nov |
Date Detail:
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Created Date: 1999-12-10 Completed Date: 1999-12-10 Revised Date: 2008-09-10 |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 1913-20 Citation Subset: IM |
Affiliation:
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Department of Psychology, University of Konstanz, Germany. matthias.m.mueller@uni-konstanz.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Affect / physiology* Alpha Rhythm / psychology Data Interpretation, Statistical Electrodes Electroencephalography / psychology* Electrophysiology Functional Laterality / physiology* Humans Male Photic Stimulation Self Assessment (Psychology) |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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