Neural correlates of chromostereopsis: An evoked potential study

Chromostereopsis is an illusion of depth arising from colour contrast: ocular chromatic aberrations usually make red appear closer to the viewer than blue. Whereas this phenomenon is widely documented from the optical and psychophysical point of view, its neural correlates have not been investigated...

Full description

Saved in:
Bibliographic Details
Published in:Neuropsychologia 2009-10, Vol.47 (12), p.2677-2681
Main Authors: Séverac Cauquil, Alexandra, Delaux, Stéphanie, Lestringant, Renaud, Taylor, Margot J., Trotter, Yves
Format: Article
Language:English
Subjects:
Adult
Behavioral psychophysiology
Biological and medical sciences
Brain Mapping
Chromostereopsis
Color Perception - physiology
Depth perception
Depth Perception - genetics
Depth Perception - physiology
Electroencephalography
Electrophysiology
Evoked Potentials, Visual - physiology
Female
Fundamental and applied biological sciences. Psychology
Human electrophysiology
Humans
Life Sciences
Magnetic Resonance Imaging - methods
Male
Neurons and Cognition
Perception
Photic Stimulation - methods
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Source modelling
VEPs
Vision
Visual Cortex - physiology
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Chromostereopsis is an illusion of depth arising from colour contrast: ocular chromatic aberrations usually make red appear closer to the viewer than blue. Whereas this phenomenon is widely documented from the optical and psychophysical point of view, its neural correlates have not been investigated. To determine the cortical processing of this colour-based depth effect, visual evoked potentials (VEPs) to contrasts of colour were recorded in 25 subjects. Chromostereopsis was found with the stimuli combining spectra extremes. VEP amplitude but not latency effects were observed to colour depth cues, suggesting an underlying, depth-specific slow negative wave, located using source modelling first in occipito-parietal, parietal, then temporal areas. The component was larger over the right hemisphere consistent with RH dominance in depth processing, likely due to context-dependent top-down modulation. These results demonstrate that the depth illusion obtained from contrast of colour implicates similar cortical areas as classic binocular depth perception.
ISSN:0028-3932
1873-3514
DOI:10.1016/j.neuropsychologia.2009.05.002