One of the fundamental goals of neuroscience is to understand how perception arises from the activity of neurons in the brain. Stereopsis is a type of three-dimensional (3D) perception that relies on two slightly different projections of the world onto the retinas of the two eyes, i.e., binocular disparity. Neurons selective for curved surfaces defined by binocular disparity may contribute to the perception of an object's 3D structure. Such neurons have been observed in both the anterior lower bank of the superior temporal sulcus (TEs, part of the inferior temporal cortex [IT]) and the anterior intraparietal area (AIP). However, the specific contributions of IT and AIP to depth perception remain unknown. We simultaneously recorded multiunit activity in IT and AIP while monkeys discriminated between concave and convex 3D shapes. We observed a correlation between the neural activity and behavioral choice that arose early and during perceptual decision formation in IT but later and after perceptual decision formation in AIP. These results suggest a role for IT, but not AIP, in 3D shape discrimination. Furthermore, the results demonstrate that similar neuronal stimulus selectivities in two areas do not imply a similar function.
Stereopsis after unilateral anterior temporal lobectomy. Dissociation between local and global measures
The removal of binocular cues disrupts the calibration of grasping in patients with visual form agnosia
Contribution of area MT to stereoscopic depth perception: choice-related response modulations reflect task strategy
Linking neural representation to function in stereoscopic depth perception: roles of the middle temporal area in coarse versus fine disparity discrimination
Estimates of the contribution of single neurons to perception depend on timescale and noise correlation
A distinct representation of three-dimensional shape in macaque anterior intraparietal area: fast, metric, and coarse
Potential confounds in estimating trial-to-trial correlations between neuronal response and behavior using choice probabilities
Three-dimensional shape coding in grasping circuits: a comparison between the anterior intraparietal area and ventral premotor area F5a
The role of binocular disparity in stereoscopic images of objects in the macaque anterior intraparietal area
The relation between functional magnetic resonance imaging activations and single-cell selectivity in the macaque intraparietal sulcus
Neuronal bases of peripersonal and extrapersonal spaces, their plasticity and their dynamics: knowns and unknowns
Effects of Microstimulation in the Anterior Intraparietal Area during Three-Dimensional Shape Categorization
A Tale of Two Visual Systems: Invariant and Adaptive Visual Information Representations in the Primate Brain
Interneuronal correlations at longer time scales predict decision signals for bistable structure-from-motion perception
Pooled, but not single-neuron, responses in macaque V4 represent a solution to the stereo correspondence problem
Identifying Cortical Substrates Underlying the Phenomenology of Stereopsis and Realness: A Pilot fMRI Study
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