Neural dynamics at successive stages of the ventral visual stream are consistent with hierarchical error signals.

ABSTRACT: Ventral visual stream neural responses are dynamic, even for static image presentations. However, dynamical neural models of visual cortex are lacking as most progress has been made modeling static, time-averaged responses. Here, we studied population neural dynamics during face detection across three cortical processing stages. Remarkably,~30 milliseconds after the initially evoked response, we found that neurons in intermediate level areas decreased their responses to typical configurations of their preferred face parts relative to their response for atypical configurations even while neurons in higher areas achieved and maintained a preference for typical configurations. These hierarchical neural dynamics were inconsistent with standard feedforward circuits. Rather, recurrent models com

SUBMITTER: Issa EB 

PROVIDER: S-EPMC6296785 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature