| Sensory competition in the face processing areas of the human brain. | |
| | |
MedLine Citation:
|
PMID: 21912694 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The concurrent presentation of multiple stimuli in the visual field may trigger mutually suppressive interactions throughout the ventral visual stream. While several studies have been performed on sensory competition effects among non-face stimuli relatively little is known about the interactions in the human brain for multiple face stimuli. In the present study we analyzed the neuronal basis of sensory competition in an event-related functional magnetic resonance imaging (fMRI) study using multiple face stimuli. We varied the ratio of faces and phase-noise images within a composite display with a constant number of peripheral stimuli, thereby manipulating the competitive interactions between faces. For contralaterally presented stimuli we observed strong competition effects in the fusiform face area (FFA) bilaterally and in the right lateral occipital area (LOC), but not in the occipital face area (OFA), suggesting their different roles in sensory competition. When we increased the spatial distance among pairs of faces the magnitude of suppressive interactions was reduced in the FFA. Surprisingly, the magnitude of competition depended on the visual hemifield of the stimuli: ipsilateral stimulation reduced the competition effects somewhat in the right LOC while it increased them in the left LOC. This suggests a left hemifield dominance of sensory competition. Our results support the sensory competition theory in the processing of multiple faces and suggests that sensory competition occurs in several cortical areas in both cerebral hemispheres. |
| | |
Authors:
|
Krisztina Nagy; Mark W Greenlee; Gyula Kovács |
Related Documents
:
|
21435374 - Rotenone induced neurotxicity in rat brain areas: a histopathological study. 21482354 - Experience-dependent retinogeniculate synapse remodeling is abnormal in mecp2-deficient... 21251924 - Pleasure seeking and birdsong. 23592534 - Classification of dorsal and ventral dimelia in humans. 21115644 - Visualization of glutamate as a volume transmitter. 19755504 - Piggybac transgenic strategies in the developing chicken spinal cord. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2011-09-02 |
Journal Detail:
|
Title: PloS one Volume: 6 ISSN: 1932-6203 ISO Abbreviation: PLoS ONE Publication Date: 2011 |
Date Detail:
|
Created Date: 2011-09-13 Completed Date: 2011-12-29 Revised Date: 2012-04-26 |
Medline Journal Info:
|
Nlm Unique ID: 101285081 Medline TA: PLoS One Country: United States |
Other Details:
|
Languages: eng Pagination: e24450 Citation Subset: IM |
Affiliation:
|
Department of Cognitive Science, Budapest University of Technology and Economics, Budapest, Hungary. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Behavior / physiology Brain / cytology, physiology* Brain Mapping* Face* Female Humans Magnetic Resonance Imaging* Male Neurons / cytology Occipital Lobe / cytology, physiology Photic Stimulation Sensation / physiology* Visual Cortex / cytology, physiology |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Direct effects of HIV-1 Tat on excitability and survival of primary dorsal root ganglion neurons: po...
Next Document: Desert farming benefits from microbial potential in arid soils and promotes diversity and plant heal...