A synaptic corollary discharge signal suppresses midbrain visual processing during saccade-like locomotion.

ABSTRACT: In motor control, the brain not only sends motor commands to the periphery, but also generates concurrent internal signals known as corollary discharge (CD) that influence sensory information processing around the time of movement. CD signals are important for identifying sensory input arising from self-motion and to compensate for it, but the underlying mechanisms remain unclear. Using whole-cell patch clamp recordings from neurons in the zebrafish optic tectum, we discovered an inhibitory synaptic signal, temporally locked to spontaneous and visually driven locomotion. This motor-related inhibition was appropriately timed to counteract visually driven excitatory input arising from the fish's own motion, and transiently suppressed tectal spiking activity. High-resolution calcium imaging r

SUBMITTER: Ali MA 

PROVIDER: S-EPMC10667368 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature