title: The neural representation of objects formed through the spatiotemporal integration of visual transients.
abstract: Oftentimes, objects are only partially and transiently visible as parts of them become occluded during observer or object motion. The visual system can integrate such object fragments across space and time into perceptual wholes or spatiotemporal objects. This integrative and dynamic process may involve both ventral and dorsal visual processing pathways, along which shape and spatial representations are thought to arise. We measured fMRI BOLD response to spatiotemporal objects and used multi-voxel pattern analysis (MVPA) to decode shape information across 20 topographic regions of visual cortex. Object identity could be decoded throughout visual cortex, including intermediate (V3A, V3B, hV4, LO1-2,) and dorsal (TO1-2, and IPS0-1) visual areas. Shape-specific information, therefore, may not be limited to early and ventral visual areas, particularly when it is dynamic and must be integrated. Contrary to the classic view that the representation of objects is the purview of the ventral stream, intermediate and dorsal areas may play a distinct and critical role in the construction of object representations across space and time.
authors.affiliation: Department of Psychology, University of Nevada, Reno, USA. Electronic address: gerlikhman@unr.edu.
authors.forename: Gennady
authors.initials: G
authors.lastname: Erlikhman
authors.affiliation: Department of Psychology, University of Nevada, Reno, USA.
authors.forename: Gennadiy
authors.initials: G
authors.lastname: Gurariy
authors.affiliation: Department of Psychology, University of Nevada, Reno, USA; Department of Psychology, Worcester State University, USA.
authors.forename: Ryan E B
authors.initials: REB
authors.lastname: Mruczek
authors.affiliation: Department of Psychology, University of Nevada, Reno, USA.
authors.forename: Gideon P
authors.initials: GP
authors.lastname: Caplovitz
mesh_terms: D000328:Adult; D001931:Brain Mapping / Q000379:methods*; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D014793:Visual Cortex / Q000000981:diagnostic imaging / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
keywords: Dorsal stream; MVPA; Shape perception; Spatiotemporal objects; V3A/B