Topic: eye position

When making choices, we allocate our fixations to each contemplated option, and tend to look longer at more valued ones (1-5). The purpose of fixation during choice remains unknown. Here we examined behavioral and neural activity of rhesus macaques (Macaca mulatta) performing a two-options risky choice task in which offers occurred in sequence, each followed by a long (600 ms) blank screen delay period. As expected, we found that subjects allocated their gaze towards offer presentation locations and spent more time looking at most valuable offers; after factoring out value, we found that more

Visual input to the brain is highly dynamic during natural behavior due to movements of the eyes, head, and body through complex environments. Previous studies have shown that neurons in mouse primary visual cortex (V1) respond to eye and head movements, but how these signals are integrated with visual processing during free movement is unknown since visual physiology is generally performed under conditions of head-fixation. To address this, we performed the first measurements of visual receptive fields (RFs) from freely moving animals by using single-unit electrophysiology in V1 while simulta

Investigating vision through naturalistic stimuli holds great promise, because the visual system of any animal species is adapted to its ecological niche. In mice, such adaptations include a field of view exceeding 300° and cone opsins sensitive to UV and green light. These adaptations, however, cannot be probed with standard consumer displays.To present naturalistic stimuli with respect to coverage, color, and content to mice, we built a hemispheric dome setup, enabling the controlled projection of wide-field movies with UV-green spectral content. For our UV-green projection, we used a custom