Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation
Vision is important for estimating self-motion, which is thought to involve optic-flow processing. Here, we investigated the fMRI response profiles in visual area V6, the precuneus motion area (PcM), and the cingulate sulcus visual area (CSv)—three medial brain regions recently shown to be sensitive...
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doaj-4c22ac0bac9e47ec93e7caaf0e5e0f0e2020-11-24T21:54:04ZengFrontiers Media S.A.Frontiers in Psychology1664-10782016-03-01710.3389/fpsyg.2016.0030996214Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulationAtsushi eWada0Atsushi eWada1Atsushi eWada2Yuichi eSakano3Yuichi eSakano4Yuichi eSakano5Hiroshi eAndo6Hiroshi eAndo7Hiroshi eAndo8National Institute of Information and Communications TechnologyNational Institute of Information and Communications Technology, and Osaka UniversityOsaka UniversityNational Institute of Information and Communications TechnologyNational Institute of Information and Communications Technology, and Osaka UniversityOsaka UniversityNational Institute of Information and Communications TechnologyNational Institute of Information and Communications Technology, and Osaka UniversityOsaka UniversityVision is important for estimating self-motion, which is thought to involve optic-flow processing. Here, we investigated the fMRI response profiles in visual area V6, the precuneus motion area (PcM), and the cingulate sulcus visual area (CSv)—three medial brain regions recently shown to be sensitive to optic-flow. We used wide-view stereoscopic stimulation to induce robust self-motion processing. Stimuli included static, randomly moving, and coherently moving dots (simulating forward self-motion). We varied the stimulus size and the presence of stereoscopic information. A combination of univariate and multi-voxel pattern analyses (MVPA) revealed that fMRI responses in the three regions differed from each other. The univariate analysis identified optic-flow selectivity and an effect of stimulus size in V6, PcM, and CSv, among which only CSv showed a significantly lower response to random motion stimuli compared with static conditions. Furthermore, MVPA revealed an optic-flow specific multi-voxel pattern in the PcM and CSv, where the discrimination of coherent motion from both random motion and static conditions showed above-chance prediction accuracy, but that of random motion from static conditions did not. Additionally, while area V6 successfully classified different stimulus sizes regardless of motion pattern, this classification was only partial in PcM and was absent in CSv. This may reflect the known retinotopic representation in V6 and the absence of such clear visuospatial representation in CSv. We also found significant correlations between the strength of subjective self-motion and univariate activation in all examined regions except for primary visual cortex (V1). This neuro-perceptual correlation was significantly higher for V6, PcM, and CSv when compared with V1, and higher for CSv when compared with the visual motion area hMT+. Our convergent results suggest the significant involvement of CSv in self-motion processing, which may give rise to its percept.http://journal.frontiersin.org/Journal/10.3389/fpsyg.2016.00309/fullfMRIbinocular disparitymulti-voxel pattern analysisMotion-in-depthego-motionoptic-flow |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Atsushi eWada Atsushi eWada Atsushi eWada Yuichi eSakano Yuichi eSakano Yuichi eSakano Hiroshi eAndo Hiroshi eAndo Hiroshi eAndo |
spellingShingle |
Atsushi eWada Atsushi eWada Atsushi eWada Yuichi eSakano Yuichi eSakano Yuichi eSakano Hiroshi eAndo Hiroshi eAndo Hiroshi eAndo Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation Frontiers in Psychology fMRI binocular disparity multi-voxel pattern analysis Motion-in-depth ego-motion optic-flow |
author_facet |
Atsushi eWada Atsushi eWada Atsushi eWada Yuichi eSakano Yuichi eSakano Yuichi eSakano Hiroshi eAndo Hiroshi eAndo Hiroshi eAndo |
author_sort |
Atsushi eWada |
title |
Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
title_short |
Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
title_full |
Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
title_fullStr |
Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
title_full_unstemmed |
Differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
title_sort |
differential responses to a visual self-motion signal in human medial cortical regions revealed by wide-view stimulation |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Psychology |
issn |
1664-1078 |
publishDate |
2016-03-01 |
description |
Vision is important for estimating self-motion, which is thought to involve optic-flow processing. Here, we investigated the fMRI response profiles in visual area V6, the precuneus motion area (PcM), and the cingulate sulcus visual area (CSv)—three medial brain regions recently shown to be sensitive to optic-flow. We used wide-view stereoscopic stimulation to induce robust self-motion processing. Stimuli included static, randomly moving, and coherently moving dots (simulating forward self-motion). We varied the stimulus size and the presence of stereoscopic information. A combination of univariate and multi-voxel pattern analyses (MVPA) revealed that fMRI responses in the three regions differed from each other. The univariate analysis identified optic-flow selectivity and an effect of stimulus size in V6, PcM, and CSv, among which only CSv showed a significantly lower response to random motion stimuli compared with static conditions. Furthermore, MVPA revealed an optic-flow specific multi-voxel pattern in the PcM and CSv, where the discrimination of coherent motion from both random motion and static conditions showed above-chance prediction accuracy, but that of random motion from static conditions did not. Additionally, while area V6 successfully classified different stimulus sizes regardless of motion pattern, this classification was only partial in PcM and was absent in CSv. This may reflect the known retinotopic representation in V6 and the absence of such clear visuospatial representation in CSv. We also found significant correlations between the strength of subjective self-motion and univariate activation in all examined regions except for primary visual cortex (V1). This neuro-perceptual correlation was significantly higher for V6, PcM, and CSv when compared with V1, and higher for CSv when compared with the visual motion area hMT+. Our convergent results suggest the significant involvement of CSv in self-motion processing, which may give rise to its percept. |
topic |
fMRI binocular disparity multi-voxel pattern analysis Motion-in-depth ego-motion optic-flow |
url |
http://journal.frontiersin.org/Journal/10.3389/fpsyg.2016.00309/full |
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