Recurrent circuits encode de novo visual center-surround computations in the mouse superior colliculus.

ABSTRACT: Models of visual salience detection rely on center-surround interactions, yet it remains unclear how these computations are distributed across retinal, cortical, and subcortical circuits due to their overlapping contributions. Here, we reveal a de novo collicular mechanism for surround suppression by combining patterned optogenetics with whole-cell recordings from individual neurons in the mouse superficial superior colliculus (SCs). Center zones were defined by monosynaptic input from channelrhodopsin-expressing retinal ganglion cells in collicular midbrain slices. Surround network optoactivation suppressed center responses compared to center-only input. This suppression is excitatory in origin, arising from the withdrawal of center excitation via surround-driven inhibition of local recur

SUBMITTER: Cui P 

PROVIDER: S-EPMC12530612 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature