Document Detail

A motion-dependent distortion of retinotopy in area V4.
MedLine Citation:
PMID:  16446147     Owner:  NLM     Status:  MEDLINE    
When one element in an apparent motion sequence differs in color from the others, it is perceived as shifted along the motion trajectory. We examined whether V4 neurons encode the physical or perceived location of this "flashed" element by recording neuronal responses while monkeys viewed these stimuli. The retinotopic locus of V4 activity evoked by the flashed element shifted along the motion trajectory. The magnitude of the shift is consistent with the perceptual shift in humans viewing identical stimuli. This retinotopic distortion depended on the presence of a flashed element but was observed for both color-selective and non-color-selective neurons. The distortion was undiminished when the flashed element terminated the sequence, a condition that reduced the perceptual shift in humans. These findings are consistent with a Bayesian model of localization in which perceived location is derived from position signals optimally integrated across visual areas.
Kristy A Sundberg; Mazyar Fallah; John H Reynolds
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Neuron     Volume:  49     ISSN:  0896-6273     ISO Abbreviation:  Neuron     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-31     Completed Date:  2006-03-30     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8809320     Medline TA:  Neuron     Country:  United States    
Other Details:
Languages:  eng     Pagination:  447-57     Citation Subset:  IM    
Systems Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA.
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MeSH Terms
Action Potentials / physiology
Attention / physiology
Bayes Theorem
Brain Mapping
Cell Count / methods
Color Perception / physiology*
Eye Movements
Functional Laterality
Macaca mulatta
Models, Biological
Motion Perception / physiology*
Neurons / physiology*
Photic Stimulation / methods
Psychophysics / methods
Reaction Time
Visual Cortex / cytology*
Visual Fields / physiology*
Grant Support
1R01EY13802-01/EY/NEI NIH HHS
Comment In:
Neuron. 2006 Feb 2;49(3):327-9   [PMID:  16446136 ]

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