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Differential spatial computations in ventral and lateral face-selective regions are scaffolded by structural connections
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Differential spatial computations in ventral and lateral face-selective regions are scaffolded by structural connections
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Journal Article
Differential spatial computations in ventral and lateral face-selective regions are scaffolded by structural connections
2021
Overview
Face-processing occurs across ventral and lateral visual streams, which are involved in static and dynamic face perception, respectively. However, the nature of spatial computations across streams is unknown. Using functional MRI and population receptive field (pRF) mapping, we measured pRFs in face-selective regions. Results reveal that spatial computations by pRFs in ventral face-selective regions are concentrated around the center of gaze (fovea), but spatial computations in lateral face-selective regions extend peripherally. Diffusion MRI reveals that these differences are mirrored by a preponderance of white matter connections between ventral face-selective regions and foveal early visual cortex (EVC), while connections with lateral regions are distributed more uniformly across EVC eccentricities. These findings suggest a rethinking of spatial computations in face-selective regions, showing that they vary across ventral and lateral streams, and further propose that spatial computations in high-level regions are scaffolded by the fine-grain pattern of white matter connections from EVC.
Humans process faces using face-selective regions in the ventral and lateral streams which perform different tasks. Here, the authors show via functional and diffusion MRI that the spatial computations in face-selective regions vary across streams, constrained by connections from early visual areas.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 59/57
/ Adult
/ Bias
/ Cartoons
/ Eye
/ Facial Recognition - physiology
/ Female
/ Fovea
/ Functional magnetic resonance imaging
/ Humanities and Social Sciences
/ Humans
/ Male
/ Retina
/ Science
/ Temporal Lobe - diagnostic imaging
/ Visual Cortex - diagnostic imaging
/ Visual Pathways - physiology
