Document Detail


Contour saliency in primary visual cortex.
MedLine Citation:
PMID:  16772175     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Contour integration is an important intermediate stage of object recognition, in which line segments belonging to an object boundary are perceptually linked and segmented from complex backgrounds. Contextual influences observed in primary visual cortex (V1) suggest the involvement of V1 in contour integration. Here, we provide direct evidence that, in monkeys performing a contour detection task, there was a close correlation between the responses of V1 neurons and the perceptual saliency of contours. Receiver operating characteristic analysis showed that single neuronal responses encode the presence or absence of a contour as reliably as the animal's behavioral responses. We also show that the same visual contours elicited significantly weaker neuronal responses when they were not detected in the detection task, or when they were unattended. Our results demonstrate that contextual interactions in V1 play a pivotal role in contour integration and saliency.
Authors:
Wu Li; Valentin Piëch; Charles D Gilbert
Related Documents :
8570605 - Computational models of cortical visual processing.
21092865 - Human posterior parietal cortex flexibly determines reference frames for reaching based...
3228555 - Coherent oscillations: a mechanism of feature linking in the visual cortex? multiple el...
23264875 - Managing biological complexity across orthologs with a visual knowledgebase of document...
6563985 - Range of alcohol-induced damage in the developing central nervous system.
1511525 - The development of neuropeptide y immunoreactive neurons in cat visual cortical areas.
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Neuron     Volume:  50     ISSN:  0896-6273     ISO Abbreviation:  Neuron     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-06-14     Completed Date:  2006-07-25     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8809320     Medline TA:  Neuron     Country:  United States    
Other Details:
Languages:  eng     Pagination:  951-62     Citation Subset:  IM    
Affiliation:
The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Action Potentials / physiology
Animals
Form Perception / physiology*
Macaca mulatta
Male
Photic Stimulation / methods
Visual Cortex / physiology*
Grant Support
ID/Acronym/Agency:
EY07968/EY/NEI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Representation of natural stimuli in the rodent main olfactory bulb.
Next Document:  Broca's area and the hierarchical organization of human behavior.