Bottom-up saliency and top-down learning in the primary visual cortex of monkeys.

ABSTRACT: Early sensory cortex is better known for representing sensory inputs but less for the effect of its responses on behavior. Here we explore the behavioral correlates of neuronal responses in primary visual cortex (V1) in a task to detect a uniquely oriented bar-the orientation singleton-in a background of uniformly oriented bars. This singleton is salient or inconspicuous when the orientation contrast between the singleton and background bars is sufficiently large or small, respectively. Using implanted microelectrodes, we measured V1 activities while monkeys were trained to quickly saccade to the singleton. A neuron's responses to the singleton within its receptive field had an early and a late component, both increased with the orientation contrast. The early component started from the ou

SUBMITTER: Yan Y 

PROVIDER: S-EPMC6187116 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature