Document Detail


Predictive coding for motion stimuli in human early visual cortex.
MedLine Citation:
PMID:  25445839     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The current study investigates if early visual cortical areas, V1, V2 and V3, use predictive coding to process motion information. Previous studies have reported biased visual motion responses at locations where novel visual information was presented (i.e., the motion trailing edge), which is plausibly linked to the predictability of visual input. Using high-field functional magnetic resonance imaging (fMRI), we measured brain activation during predictable versus unpreceded motion-induced contrast changes during several motion stimuli. We found that unpreceded moving dots appearing at the trailing edge gave rise to enhanced BOLD responses, whereas predictable moving dots at the leading edge resulted in suppressed BOLD responses. Furthermore, we excluded biases in directional sensitivity, shifts in cortical stimulus representation, visuo-spatial attention and classical receptive field effects as viable alternative explanations. The results clearly indicate the presence of predictive coding mechanisms in early visual cortex for visual motion processing, underlying the construction of stable percepts out of highly dynamic visual input.
Authors:
Wouter Schellekens; Richard J A van Wezel; Natalia Petridou; Nick F Ramsey; Mathijs Raemaekers
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-2
Journal Detail:
Title:  Brain structure & function     Volume:  -     ISSN:  1863-2661     ISO Abbreviation:  Brain Struct Funct     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  101282001     Medline TA:  Brain Struct Funct     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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