Petr ZNAMENSKIY Representation of three-dimensional visual scenes in the mouse visual cortex
IBENS Neuroscience seminar
11h
Le séminaire de Petr ZNAMENSKIY (The Francis Crick Institute, UK) aura lieu dans la salle Favard, IBENS 46 rue d’Ulm 75005 Paris
Abstract :
In the visual system, the signals available to the brain are limited to the two-dimensional images formed on the retinae. To reconstruct the three-dimensional location of objects in the environment, visual circuits must infer the missing depth information. This ability is innate in most mammals, not requiring visual experience, and involves the neocortex. While animals take advantage of both monocular and binocular signals to estimate depth, binocular vision is not necessary for depth perception. Animals’ innate capacity for depth perception is thought to rely on motion parallax – visual motion resulting from animals movements. I will show that neurons in the mouse primary visual cortex are selective for depth from motion parallax as a result of integration of visual and locomotion-related signals. Consequently, V1 neurons have three-dimensional receptive fields – they are selective for both retinotopic location and depth of visual stimuli. I will also present our unpublished work exploring the circuits supporting such computations.