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Bringing the real world into the fMRI scanner: Repetition effects for pictures versus real objects.
MedLine Citation:
PMID:  22355647     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Our understanding of the neural underpinnings of perception is largely built upon studies employing 2-dimensional (2D) planar images. Here we used slow event-related functional imaging in humans to examine whether neural populations show a characteristic repetition-related change in haemodynamic response for real-world 3-dimensional (3D) objects, an effect commonly observed using 2D images. As expected, trials involving 2D pictures of objects produced robust repetition effects within classic object-selective cortical regions along the ventral and dorsal visual processing streams. Surprisingly, however, repetition effects were weak, if not absent on trials involving the 3D objects. These results suggest that the neural mechanisms involved in processing real objects may therefore be distinct from those that arise when we encounter a 2D representation of the same items. These preliminary results suggest the need for further research with ecologically valid stimuli in other imaging designs to broaden our understanding of the neural mechanisms underlying human vision.
Authors:
Jacqueline C Snow; Charles E Pettypiece; Teresa D McAdam; Adam D McLean; Patrick W Stroman; Melvyn A Goodale; Jody C Culham
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Publication Detail:
Type:  Journal Article     Date:  2011-10-26
Journal Detail:
Title:  Scientific reports     Volume:  1     ISSN:  2045-2322     ISO Abbreviation:  Sci Rep     Publication Date:  2011  
Date Detail:
Created Date:  2012-02-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101563288     Medline TA:  Sci Rep     Country:  England    
Other Details:
Languages:  eng     Pagination:  130     Citation Subset:  -    
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