Hdl Handle:
http://hdl.handle.net/10675.2/800
Title:
Object recognition in clutter: cortical responses depend on the type of learning
Authors:
Hegéd, Jay; Thompson, Serena K.; Brady, Mark; Kersten, Daniel
Abstract:
Theoretical studies suggest that the visual system uses prior knowledge of visual objects to recognize them in visual clutter, and posit that the strategies for recognizing objects in clutter may differ depending on whether or not the object was learned in clutter to begin with. We tested this hypothesis using functional magnetic resonance imaging (fMRI) of human subjects. We trained subjects to recognize naturalistic, yet novel objects in strong or weak clutter. We then tested subjects' recognition performance for both sets of objects in strong clutter. We found many brain regions that were differentially responsive to objects during object recognition depending on whether they were learned in strong or weak clutter. In particular, the responses of the left fusiform gyrus (FG) reliably reflected, on a trial-to-trial basis, subjects' object recognition performance for objects learned in the presence of strong clutter. These results indicate that the visual system does not use a single, general-purpose mechanism to cope with clutter. Instead, there are two distinct spatial patterns of activation whose responses are attributable not to the visual context in which the objects were seen, but to the context in which the objects were learned.
Citation:
Front Hum Neurosci. 2012 Jun 19; 6:170
Issue Date:
19-Jun-2012
URI:
http://hdl.handle.net/10675.2/800
DOI:
10.3389/fnhum.2012.00170
PubMed ID:
22723774
PubMed Central ID:
PMC3378082
Type:
Article
ISSN:
1662-5161
Appears in Collections:
Department of Ophthalmology: Faculty Research and Presentations

Full metadata record

DC FieldValue Language
dc.contributor.authorHegéd, Jayen_US
dc.contributor.authorThompson, Serena K.en_US
dc.contributor.authorBrady, Marken_US
dc.contributor.authorKersten, Danielen_US
dc.date.accessioned2012-10-26T20:30:46Z-
dc.date.available2012-10-26T20:30:46Z-
dc.date.issued2012-06-19en_US
dc.identifier.citationFront Hum Neurosci. 2012 Jun 19; 6:170en_US
dc.identifier.issn1662-5161en_US
dc.identifier.pmid22723774en_US
dc.identifier.doi10.3389/fnhum.2012.00170en_US
dc.identifier.urihttp://hdl.handle.net/10675.2/800-
dc.description.abstractTheoretical studies suggest that the visual system uses prior knowledge of visual objects to recognize them in visual clutter, and posit that the strategies for recognizing objects in clutter may differ depending on whether or not the object was learned in clutter to begin with. We tested this hypothesis using functional magnetic resonance imaging (fMRI) of human subjects. We trained subjects to recognize naturalistic, yet novel objects in strong or weak clutter. We then tested subjects' recognition performance for both sets of objects in strong clutter. We found many brain regions that were differentially responsive to objects during object recognition depending on whether they were learned in strong or weak clutter. In particular, the responses of the left fusiform gyrus (FG) reliably reflected, on a trial-to-trial basis, subjects' object recognition performance for objects learned in the presence of strong clutter. These results indicate that the visual system does not use a single, general-purpose mechanism to cope with clutter. Instead, there are two distinct spatial patterns of activation whose responses are attributable not to the visual context in which the objects were seen, but to the context in which the objects were learned.en_US
dc.rightsCopyright © 2012 Hegdé, Thompson, Brady and Kersten.en_US
dc.subjectNeuroscienceen_US
dc.subjectOriginal Research Articleen_US
dc.titleObject recognition in clutter: cortical responses depend on the type of learningen_US
dc.typeArticleen_US
dc.identifier.pmcidPMC3378082en_US
dc.contributor.corporatenameDepartment of Ophthalmology-
dc.contributor.corporatenameVision Discovery Institute-
dc.contributor.corporatenameBrain & Behavior Discovery Institute-
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