V1 neurons respond differently to object motion versus motion from eye movements.

ABSTRACT: How does the visual system differentiate self-generated motion from motion in the external world? Humans can discern object motion from identical retinal image displacements induced by eye movements, but the brain mechanisms underlying this ability are unknown. Here we exploit the frequent production of microsaccades during ocular fixation in the primate to compare primary visual cortical responses to self-generated motion (real microsaccades) versus motion in the external world (object motion mimicking microsaccades). Real and simulated microsaccades were randomly interleaved in the same viewing condition, thereby producing equivalent oculomotor and behavioural engagement. Our results show that real microsaccades generate biphasic neural responses, consisting of a rapid increase in the fi

SUBMITTER: Troncoso XG 

PROVIDER: S-EPMC4579399 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature