Single-cell responses to three-dimensional structure in a functionally defined patch in macaque area TEO
Autor: | Ilse Van Dromme, Amir-Mohammad Alizadeh, Peter Janssen |
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Rok vydání: | 2018 |
Předmět: |
Male
0301 basic medicine extrastriate cortex Physiology media_common.quotation_subject Macaque 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Extrastriate cortex Parietal Lobe biology.animal parasitic diseases medicine Animals Contrast (vision) Visual Pathways Single-unit recording media_common Neurons Physics Brain Mapping biology General Neuroscience fMRI macaque Macaca mulatta single-unit recordings 030104 developmental biology medicine.anatomical_structure Visual Perception binocular disparity Binocular disparity Neuroscience 030217 neurology & neurosurgery Research Article |
Zdroj: | Journal of Neurophysiology. 120:2806-2818 |
ISSN: | 1522-1598 0022-3077 |
Popis: | Both dorsal and ventral visual pathways harbor several areas sensitive to gradients of binocular disparity (i.e., higher-order disparity). Although a wealth of information exists about disparity processing in early visual (V1, V2, and V3) and end-stage areas, TE in the ventral stream, and the anterior intraparietal area (AIP) in the dorsal stream, little is known about midlevel area TEO in the ventral pathway. We recorded single-unit responses to disparity-defined curved stimuli in a functional magnetic resonance imaging (fMRI) activation elicited by curved surfaces compared with flat surfaces in the macaque area TEO. This fMRI activation contained a small proportion of disparity-selective neurons, with very few of them second-order disparity selective. Overall, this population of TEO neurons did not preserve its three-dimensional structure selectivity across positions in depth, indicating a lack of higher-order disparity selectivity, but showed stronger responses to flat surfaces than to curved surfaces, as predicted by the fMRI experiment. The receptive fields of the responsive TEO cells were relatively small and generally foveal. A linear support vector machine classifier showed that this population of disparity-selective TEO neurons contains reliable information about the sign of curvature and the position in depth of the stimulus. NEW & NOTEWORTHY We recorded in a part of the macaque area TEO that is activated more by curved surfaces than by flat surfaces at different disparities using the same stimuli. In contrast to previous studies, this functional magnetic resonance imaging-defined patch did not contain a large number of higher-order disparity-selective neurons. However, a linear support vector machine could reliably classify both the sign of the disparity gradient and the position in depth of the stimuli. ispartof: JOURNAL OF NEUROPHYSIOLOGY vol:120 issue:6 pages:2806-2818 ispartof: location:United States status: published |
Databáze: | OpenAIRE |
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