title: Processing of Egomotion-Consistent Optic Flow in the Rhesus Macaque Cortex.
abstract: The cortical network that processes visual cues to self-motion was characterized with functional magnetic resonance imaging in 3 awake behaving macaques. The experimental protocol was similar to previous human studies in which the responses to a single large optic flow patch were contrasted with responses to an array of 9 similar flow patches. This distinguishes cortical regions where neurons respond to flow in their receptive fields regardless of surrounding motion from those that are sensitive to whether the overall image arises from self-motion. In all 3 animals, significant selectivity for egomotion-consistent flow was found in several areas previously associated with optic flow processing, and notably dorsal middle superior temporal area, ventral intra-parietal area, and VPS. It was also seen in areas 7a (Opt), STPm, FEFsem, FEFsac and in a region of the cingulate sulcus that may be homologous with human area CSv. Selectivity for egomotion-compatible flow was never total but was particularly strong in VPS and putative macaque CSv. Direct comparison of results with the equivalent human studies reveals several commonalities but also some differences.
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Benoit R
authors.initials: BR
authors.lastname: Cottereau
authors.affiliation: Department of Psychology, Royal Holloway, University of London, Egham, UK.
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Smith
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Samy
authors.initials: S
authors.lastname: Rima
authors.affiliation: Laboratoire d'Anthropologie Moléculaire et Imagerie de Synthèse, CNRS-Université de Toulouse, Toulouse, France.
authors.forename: Denis
authors.initials: D
authors.lastname: Fize
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Yseult
authors.initials: Y
authors.lastname: Héjja-Brichard
authors.affiliation: CNRS, CE2F PRIM UMS3537, Marseille, France.|Aix Marseille Université, Centre d'Exploration Fonctionnelle et de Formation, Marseille, France.
authors.forename: Luc
authors.initials: L
authors.lastname: Renaud
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Camille
authors.initials: C
authors.lastname: Lejards
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Vayssière
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Yves
authors.initials: Y
authors.lastname: Trotter
authors.affiliation: Université de Toulouse, Centre de Recherche Cerveau et Cognition, Toulouse, France.|Centre National de la Recherche Scientifique, Toulouse, France.
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Durand
mesh_terms: D000818:Animals; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D003463:Cues; D005260:Female; D008253:Macaca mulatta; D008279:Magnetic Resonance Imaging; D009039:Motion Perception / Q000502:physiology*; D057849:Optic Flow / Q000502:physiology*; D010775:Photic Stimulation
keywords: egomotion; heading; monkey fMRI; optic flow; vision