First-order visual interneurons distribute distinct contrast and luminance information across ON and OFF pathways to achieve stable behavior.

ABSTRACT: The accurate processing of contrast is the basis for all visually guided behaviors. Visual scenes with rapidly changing illumination challenge contrast computation because photoreceptor adaptation is not fast enough to compensate for such changes. Yet, human perception of contrast is stable even when the visual environment is quickly changing, suggesting rapid post receptor luminance gain control. Similarly, in the fruit fly Drosophila, such gain control leads to luminance invariant behavior for moving OFF stimuli. Here, we show that behavioral responses to moving ON stimuli also utilize a luminance gain, and that ON-motion guided behavior depends on inputs from three first-order interneurons L1, L2, and L3. Each of these neurons encodes contrast and luminance differently and distri

SUBMITTER: Ketkar MD 

PROVIDER: S-EPMC8967382 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature