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Title: Activity in early visual areas predicts interindividual differences in binocular rivalry dynamics.
Authors: Yamashiro, Hiroyuki
Yamamoto, Hiroki  kyouindb  KAKEN_id
Mano, Hiroaki
Umeda, Masahiro
Higuchi, Toshihiro
Saiki, Jun  kyouindb  KAKEN_id
Author's alias: 山本, 洋紀
Keywords: binocular rivalry dynamics
continuous flash suppression
individual differences
early visual areas
functional magnetic resonance imaging
fMRI
Issue Date: 15-Mar-2014
Publisher: American Physiological Society
Journal title: Journal of neurophysiology
Volume: 111
Issue: 6
Start page: 1190
End page: 1202
Abstract: When dissimilar images are presented to the two eyes, binocular rivalry (BR) occurs, and perception alternates spontaneously between the images. Although neural correlates of the oscillating perception during BR have been found in multiple sites along the visual pathway, the source of BR dynamics is unclear. Psychophysical and modeling studies suggest that both low- and high-level cortical processes underlie BR dynamics. Previous neuroimaging studies have demonstrated the involvement of high-level regions by showing that frontal and parietal cortices responded time locked to spontaneous perceptual alternation in BR. However, a potential contribution of early visual areas to BR dynamics has been overlooked, because these areas also responded to the physical stimulus alternation mimicking BR. In the present study, instead of focusing on activity during perceptual switches, we highlighted brain activity during suppression periods to investigate a potential link between activity in human early visual areas and BR dynamics. We used a strong interocular suppression paradigm called continuous flash suppression to suppress and fluctuate the visibility of a probe stimulus and measured retinotopic responses to the onset of the invisible probe using functional MRI. There were ∼130-fold differences in the median suppression durations across 12 subjects. The individual differences in suppression durations could be predicted by the amplitudes of the retinotopic activity in extrastriate visual areas (V3 and V4v) evoked by the invisible probe. Weaker responses were associated with longer suppression durations. These results demonstrate that retinotopic representations in early visual areas play a role in the dynamics of perceptual alternations during BR.
Rights: Licensed under Creative Commons Attribution CC-BY 3.0: © the American Physiological Society.
URI: http://hdl.handle.net/2433/189078
DOI(Published Version): 10.1152/jn.00509.2013
PubMed ID: 24353304
Appears in Collections:Journal Articles

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