Binocular matching in monkey visual cortex: Single cell responses to correlated and uncorrelated dynamic random dot stereograms

Abstract

This paper presents results obtained from experiments performed on two behaving monkeys ( Macaca mulatta) viewing correlated and uncorrelated dynamic random dot stereograms. Extracellular single unit activity was recorded from areas V1 and V2. We found that cells sensitive to correlated stereograms (38%) were also sensitive to uncorrelated stereograms. Regarding their response to both situations, these cells were grouped into two types. The first type (57%), termed “correlation-sensitive cells”, responded with statistically significant difference to correlated and uncorrelated stereograms. The second type responded equally to both stereograms (43%), and therefore they were termed “correlation insensitive cells”. Our data suggest that these two types may form two populations with different functions subserving depth perception.