Ventral stream hierarchy underlying perceptual organization in adolescents with autism.

ABSTRACT: Object recognition relies on a hierarchically organized ventral visual stream, with both bottom-up and top-down processes. Here, we aimed at investigating the neural underpinnings of perceptual organization along the ventral visual stream in Autism Spectrum Disorders (ASD), and at determining whether this would be associated with decreased top-down processing in ASD. Nineteen typically developing (TD) adolescents and sixteen adolescents with ASD participated in an fMRI study where they had to detect visual objects. Five conditions displayed Gabor patterns (defined by texture and/or contour) with increasing levels of perceptual organization. In each condition, both groups showed similar abilities. In line with the expected cortical hierarchy, brain activity patterns revealed a progressive i

SUBMITTER: Sapey-Triomphe LA 

PROVIDER: S-EPMC6997624 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature