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Author Schellekens, Wouter ♦ Wezel, Richard J. A. ♦ Petridou, Natalia ♦ Ramsey, Nick F. ♦ Raemaekers, Mathijs
Source SpringerLink
Content type Text
Publisher Springer Berlin Heidelberg
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health
Subject Keyword High-field fMRI ♦ Motion suppression ♦ Predictive coding ♦ Visual cortex ♦ Visual motion ♦ Neurosciences ♦ Cell Biology ♦ Neurology
Abstract 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.
ISSN 18632653
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-12-02
Publisher Place Berlin/Heidelberg
e-ISSN 18632661
Journal Anatomy and Embryology
Volume Number 221
Issue Number 2
Page Count 12
Starting Page 879
Ending Page 890

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Source: SpringerLink