Document Detail


A right visual field advantage for visual processing of manipulable objects.
MedLine Citation:
PMID:  22864955     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Information about object-associated manipulations is lateralized to left parietal regions, while information about the visual form of tools is represented bilaterally in ventral occipito-temporal cortex. It is unknown how lateralization of motor-relevant information in left-hemisphere dorsal stream regions may affect the visual processing of manipulable objects. We used a lateralized masked priming paradigm to test for a right visual field (RVF) advantage in tool processing. Target stimuli were tools and animals, and briefly presented primes were identical to or scrambled versions of the targets. In Experiment 1, primes were presented either to the left or to the right of the centrally presented target, while in Experiment 2, primes were presented in one of eight locations arranged radially around the target. In both experiments, there was a RVF advantage in priming effects for tool but not for animal targets. Control experiments showed that participants were at chance for matching the identity of the lateralized primes in a picture-word matching experiment and also ruled out a general RVF speed-of-processing advantage for tool images. These results indicate that the overrepresentation of tool knowledge in the left hemisphere affects visual object recognition and suggests that interactions between the dorsal and ventral streams occurs during object categorization.
Authors:
Frank E Garcea; Jorge Almeida; Bradford Z Mahon
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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:  Cognitive, affective & behavioral neuroscience     Volume:  12     ISSN:  1531-135X     ISO Abbreviation:  Cogn Affect Behav Neurosci     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-26     Completed Date:  2013-05-03     Revised Date:  2013-12-05    
Medline Journal Info:
Nlm Unique ID:  101083946     Medline TA:  Cogn Affect Behav Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  813-25     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Analysis of Variance
Discrimination (Psychology) / physiology*
Female
Functional Laterality / physiology*
Humans
Male
Reaction Time / physiology
Recognition (Psychology) / physiology*
Semantics
Visual Fields / physiology*
Visual Pathways / physiology
Visual Perception / physiology*
Young Adult
Grant Support
ID/Acronym/Agency:
5 T32 19942-13//PHS HHS; R21 NS076176/NS/NINDS NIH HHS; R21NS076176-01A1/NS/NINDS NIH HHS
Comments/Corrections

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