The evolution of a disparity decision in human visual cortex
| Autor: | Justin M. Ales, Anthony M. Norcia, Benoit R. Cottereau |
|---|---|
| Přispěvatelé: | Centre de recherche cerveau et cognition (CERCO), Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2014 |
| Předmět: |
Adult
Male Vision Disparity genetic structures Nerve net Cognitive Neuroscience media_common.quotation_subject Electroencephalography Choice Behavior Brain mapping Article Judgment Young Adult 03 medical and health sciences Neural activity 0302 clinical medicine Perception medicine Humans Computer vision Aged Visual Cortex 030304 developmental biology media_common Brain Mapping 0303 health sciences medicine.diagnostic_test business.industry [SCCO.NEUR]Cognitive science/Neuroscience Middle Aged Magnetic Resonance Imaging Visual cortex medicine.anatomical_structure nervous system Neurology Female Artificial intelligence Cues Nerve Net business Psychology Binocular vision Neuroscience psychological phenomena and processes 030217 neurology & neurosurgery |
| Zdroj: | NeuroImage NeuroImage, Elsevier, 2014, 92, pp.193--206. ⟨10.1016/j.neuroimage.2014.01.055⟩ |
| ISSN: | 1053-8119 1095-9572 |
| DOI: | 10.1016/j.neuroimage.2014.01.055 |
| Popis: | article i nfo We used fMRI-informed EEG source-imaging in humans to characterize the dynamics of cortical responses during a disparity-discriminationtask.Aftertheonset ofadisparity-definedtarget, decision-relatedactivity wasfound within an extended cortical network that included several occipital regions of interest (ROIs): V4, V3A, hMT+ and the Lat- eral Occipital Complex (LOC). By using a response-locked analysis, we were able to determine the timing relation- ships in this network of ROIs relative to the subject's behavioral response. Choice-related activity appeared first in the V4 ROI almost 200 ms before the button press and then subsequently in the V3A ROI. Modeling of the responses in the V4 ROI suggests that this area provides an early contribution to disparity discrimination. Choice-related re- sponses were also found after the button-press in ROIs V4, V3A, LOC and hMT+. Outside the visual cortex, choice-related activity was found in the frontal and temporal poles before the button-press. By combining the spatial resolution of fMRI-informed EEG source imaging with the ability to sort out neural activity occurring before, during and after the behavioral manifestation of the decision, our study is the fi rst to assign distinct functional roles to the extra-striate ROIs involved in perceptual decisions based on disparity, the primary cue for depth. |
| Databáze: | OpenAIRE |
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