| Neural correlates of high-level adaptation-related aftereffects. | |
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MedLine Citation:
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PMID: 20071633 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Prolonged exposure to complex stimuli, such as faces, biases perceptual decisions toward nonadapted, dissimilar stimuli, leading to contrastive aftereffects. Here we tested the neural correlates of this perceptual bias using a functional magnetic resonance imaging adaptation (fMRIa) paradigm. Adaptation to a face or hand stimulus led to aftereffects by biasing the categorization of subsequent ambiguous face/hand composite stimuli away from the adaptor category. The simultaneously observed fMRIa in the face-sensitive fusiform face area (FFA) and in the body-part-sensitive extrastriate body area (EBA) depended on the behavioral response of the subjects: adaptation to the preferred stimulus of the given area led to larger signal reduction during trials when it biased perception than during trials when it was less effective. Activity in two frontal areas correlated positively with the activity patterns in FFA and EBA. Based on our novel adaptation paradigm, the results suggest that the adaptation-induced aftereffects are mediated by the relative activity of category-sensitive areas of the human brain as demonstrated by fMRI. |
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Authors:
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Csaba Cziraki; Mark W Greenlee; Gyula Kov?cs |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-01-13 |
Journal Detail:
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Title: Journal of neurophysiology Volume: 103 ISSN: 1522-1598 ISO Abbreviation: J. Neurophysiol. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-17 Completed Date: 2010-06-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375404 Medline TA: J Neurophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 1410-7 Citation Subset: IM |
Affiliation:
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Institute of Psychology, University of Regensburg, Universit?tsstrasse 31, 93053 Regensburg, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological
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physiology* Adult Cues Data Interpretation, Statistical Face Female Figural Aftereffect / physiology* Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Male Motion Perception / physiology Occipital Lobe / physiology Oxygen / blood Photic Stimulation Temporal Lobe / physiology Visual Cortex / physiology |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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