Perceptual incongruence influences bistability and cortical activation.
We employed a parametric psychophysical design in combination with functional imaging to examine the influence of metric changes in perceptual incongruence on perceptual alternation rates and cortical responses. Subjects viewed a bistable stimulus defined by incongruent depth cues; bistability resul...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Public Library of Science (PLoS)
2009-01-01
|
Series: | PLoS ONE |
Online Access: | http://europepmc.org/articles/PMC2659433?pdf=render |
id |
doaj-ecd66f512cf34ee698b897694c3bf1e9 |
---|---|
record_format |
Article |
spelling |
doaj-ecd66f512cf34ee698b897694c3bf1e92020-11-24T21:56:44ZengPublic Library of Science (PLoS)PLoS ONE1932-62032009-01-0143e505610.1371/journal.pone.0005056Perceptual incongruence influences bistability and cortical activation.Gijs Joost BrouwerFrank TongPeter HagoortRaymond van EeRaymond van EeWe employed a parametric psychophysical design in combination with functional imaging to examine the influence of metric changes in perceptual incongruence on perceptual alternation rates and cortical responses. Subjects viewed a bistable stimulus defined by incongruent depth cues; bistability resulted from incongruence between binocular disparity and monocular perspective cues that specify different slants (slant rivalry). Psychophysical results revealed that perceptual alternation rates were positively correlated with the degree of perceived incongruence. Functional imaging revealed systematic increases in activity that paralleled the psychophysical results within anterior intraparietal sulcus, prior to the onset of perceptual alternations. We suggest that this cortical activity predicts the frequency of subsequent alternations, implying a putative causal role for these areas in initiating bistable perception. In contrast, areas implicated in form and depth processing (LOC and V3A) were sensitive to the degree of slant, but failed to show increases in activity when these cues were in conflict.http://europepmc.org/articles/PMC2659433?pdf=render |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gijs Joost Brouwer Frank Tong Peter Hagoort Raymond van Ee Raymond van Ee |
spellingShingle |
Gijs Joost Brouwer Frank Tong Peter Hagoort Raymond van Ee Raymond van Ee Perceptual incongruence influences bistability and cortical activation. PLoS ONE |
author_facet |
Gijs Joost Brouwer Frank Tong Peter Hagoort Raymond van Ee Raymond van Ee |
author_sort |
Gijs Joost Brouwer |
title |
Perceptual incongruence influences bistability and cortical activation. |
title_short |
Perceptual incongruence influences bistability and cortical activation. |
title_full |
Perceptual incongruence influences bistability and cortical activation. |
title_fullStr |
Perceptual incongruence influences bistability and cortical activation. |
title_full_unstemmed |
Perceptual incongruence influences bistability and cortical activation. |
title_sort |
perceptual incongruence influences bistability and cortical activation. |
publisher |
Public Library of Science (PLoS) |
series |
PLoS ONE |
issn |
1932-6203 |
publishDate |
2009-01-01 |
description |
We employed a parametric psychophysical design in combination with functional imaging to examine the influence of metric changes in perceptual incongruence on perceptual alternation rates and cortical responses. Subjects viewed a bistable stimulus defined by incongruent depth cues; bistability resulted from incongruence between binocular disparity and monocular perspective cues that specify different slants (slant rivalry). Psychophysical results revealed that perceptual alternation rates were positively correlated with the degree of perceived incongruence. Functional imaging revealed systematic increases in activity that paralleled the psychophysical results within anterior intraparietal sulcus, prior to the onset of perceptual alternations. We suggest that this cortical activity predicts the frequency of subsequent alternations, implying a putative causal role for these areas in initiating bistable perception. In contrast, areas implicated in form and depth processing (LOC and V3A) were sensitive to the degree of slant, but failed to show increases in activity when these cues were in conflict. |
url |
http://europepmc.org/articles/PMC2659433?pdf=render |
work_keys_str_mv |
AT gijsjoostbrouwer perceptualincongruenceinfluencesbistabilityandcorticalactivation AT franktong perceptualincongruenceinfluencesbistabilityandcorticalactivation AT peterhagoort perceptualincongruenceinfluencesbistabilityandcorticalactivation AT raymondvanee perceptualincongruenceinfluencesbistabilityandcorticalactivation AT raymondvanee perceptualincongruenceinfluencesbistabilityandcorticalactivation |
_version_ |
1725857446814023680 |