| Event-related beta oscillations are affected by emotional eliciting stimuli. | |
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MedLine Citation:
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PMID: 20692324 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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According to previous results, negative emotional facial expressions elicit oscillatory beta responses. The present study analyzes event-related beta oscillations upon presentation of International Affective Picture System (IAPS) and aims to show whether behavior of beta in response to negative IAPS pictures also have similar dynamics. IAPS pictures (unpleasant, pleasant, and neutral) were presented as a block and random passive viewing to 14 healthy subjects (8 male). Only with pictures with similar luminance level were selected as stimuli. Event-Related Potentials (ERPs) were recorded from 30 different scalp locations, and adaptive digital filtering was used for analysis in different frequency windows. The maximum peak-to-peak amplitudes were measured for each subject's averaged beta responses (15-30Hz) in the 0 and 300ms time window. Beta responses were significantly higher for unpleasant pictures than for pleasant and neutral pictures (average 50%). Beta responses were significantly higher for unpleasant than for pleasant pictures over frontal, central and parietal electrode sides (p<0.05). Furthermore, beta responses were significantly higher for unpleasant than for neutral pictures over parietal and occipital electrodes (p<0.04). In addition, the pleasant pictures elicited higher beta responses than neutral pictures over occipital electrode sites (p<0.04). The results of the present study indicate that negative emotions are related to increased beta responses in humans, independent of stimulus types (facial expression or IAPS pictures). Accordingly, beta responses to negative emotions are possibly a common phenomenon. The standardization of luminance in pictures may reduce divergences between results from different laboratories. |
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Authors:
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Bahar Güntekin; Erol Başar |
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Publication Detail:
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Type: Journal Article Date: 2010-08-06 |
Journal Detail:
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Title: Neuroscience letters Volume: 483 ISSN: 1872-7972 ISO Abbreviation: Neurosci. Lett. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-06 Completed Date: 2010-12-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7600130 Medline TA: Neurosci Lett Country: Ireland |
Other Details:
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Languages: eng Pagination: 173-8 Citation Subset: IM |
Copyright Information:
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2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Istanbul Kultur University, Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Beta Rhythm / physiology* Brain Mapping* Cerebral Cortex / physiology* Electroencephalography / methods Emotions / physiology* Evoked Potentials / physiology* Female Humans Male Photic Stimulation / methods Reaction Time / physiology Time Factors Young Adult |
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