Disparity tuning and binocularity of single neurons in cat visual cortex.

Activity from single neurons in the visual cortex of anaesthetized and paralyzed cats were recorded in response to monocular and binocular stimuli of different retinal disparities. Three different types of disparity sensitive neurons were found, characterized by (1) a response maximum near zero disparity, (2) a response minimum near zero disparity, and (3) an asymmetric disparity sensitivity. Usually, neurons of the first type receive about the same monocular input from the two eyes; the other disparity sensitive neurons respond better to monocular stimulation of one eye as compared to the other. The results closely resemble those obtained recently in the rhesus monkey.