Document Detail


Rapid simultaneous enhancement of visual sensitivity and perceived contrast during saccade preparation.
MedLine Citation:
PMID:  23035086     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Humans and other animals with foveate vision make saccadic eye movements to prioritize the visual analysis of behaviorally relevant information. Even before movement onset, visual processing is selectively enhanced at the target of a saccade, presumably gated by brain areas controlling eye movements. Here we assess concurrent changes in visual performance and perceived contrast before saccades, and show that saccade preparation enhances perception rapidly, altering early visual processing in a manner akin to increasing the physical contrast of the visual input. Observers compared orientation and contrast of a test stimulus, appearing briefly before a saccade, to a standard stimulus, presented previously during a fixation period. We found simultaneous progressive enhancement in both orientation discrimination performance and perceived contrast as time approached saccade onset. These effects were robust as early as 60 ms after the eye movement was cued, much faster than the voluntary deployment of covert attention (without eye movements), which takes ∼300 ms. Our results link the dynamics of saccade preparation, visual performance, and subjective experience and show that upcoming eye movements alter visual processing by increasing the signal strength.
Authors:
Martin Rolfs; Marisa Carrasco
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of neuroscience : the official journal of the Society for Neuroscience     Volume:  32     ISSN:  1529-2401     ISO Abbreviation:  J. Neurosci.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-04     Completed Date:  2013-01-17     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  8102140     Medline TA:  J Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13744-52a     Citation Subset:  IM    
Affiliation:
Department of Psychology, New York University, New York, New York 10003, USA. martin.rolfs@nyu.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Contrast Sensitivity / physiology*
Cues
Discrimination (Psychology) / physiology
Female
Humans
Male
Perceptual Masking / physiology
Psychomotor Performance / physiology
Reaction Time / physiology
Saccades / physiology*
Sensory Thresholds / physiology*
Young Adult
Grant Support
ID/Acronym/Agency:
R01 EY016200/EY/NEI NIH HHS; R01 EY016200/EY/NEI NIH HHS
Comments/Corrections

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