title: Neural representation of motion-in-depth in area MT.
abstract: Neural processing of 2D visual motion has been studied extensively, but relatively little is known about how visual cortical neurons represent visual motion trajectories that include a component toward or away from the observer (motion in depth). Psychophysical studies have demonstrated that humans perceive motion in depth based on both changes in binocular disparity over time (CD cue) and interocular velocity differences (IOVD cue). However, evidence for neurons that represent motion in depth has been limited, especially in primates, and it is unknown whether such neurons make use of CD or IOVD cues. We show that approximately one-half of neurons in macaque area MT are selective for the direction of motion in depth, and that this selectivity is driven primarily by IOVD cues, with a small contribution from the CD cue. Our results establish that area MT, a central hub of the primate visual motion processing system, contains a 3D representation of visual motion.
authors.affiliation: Division of Sensory and Cognitive Information, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan and.
authors.forename: Takahisa M
authors.initials: TM
authors.lastname: Sanada
authors.affiliation: Department of Brain and Cognitive Sciences, Center for Visual Science, University of Rochester, New York 14627 gdeangelis@cvs.rochester.edu.
authors.forename: Gregory C
authors.identifier: http://orcid.org/0000-0002-1635-1273
authors.initials: GC
authors.lastname: DeAngelis
mesh_terms: D000818:Animals; D003463:Cues; D003867:Depth Perception / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D008253:Macaca mulatta; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D015348:Vision, Binocular / Q000502:physiology; D015349:Vision, Monocular / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology
keywords: depth; extrastriate; motion; visual cortex