title: Remapping, Spatial Stability, and Temporal Continuity: From the Pre-Saccadic to Postsaccadic Representation of Visual Space in LIP.
abstract: As our eyes move, we have a strong percept that the world is stable in space and time; however, the signals in cortex coming from the retina change with each eye movement. It is not known how this changing input produces the visual percept we experience, although the predictive remapping of receptive fields has been described as a likely candidate. To explain how remapping accounts for perceptual stability, we examined responses of neurons in the lateral intraparietal area while animals performed a visual foraging task. When a stimulus was brought into the response field of a neuron that exhibited remapping, the onset of the postsaccadic representation occurred shortly after the saccade ends. Whenever a stimulus was taken out of the response field, the presaccadic representation abruptly ended shortly after the eyes stopped moving. In the 38% (20/52) of neurons that exhibited remapping, there was no more than 30 ms between the end of the presaccadic representation and the start of the postsaccadic representation and, in some neurons, and the population as a whole, it was continuous. We conclude by describing how this seamless shift from a presaccadic to postsaccadic representation could contribute to spatial stability and temporal continuity.
authors.affiliation: Department of Neurobiology.
authors.forename: Koorosh
authors.initials: K
authors.lastname: Mirpour
authors.affiliation: Department of Neurobiology Jules Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA Department of Psychology and the Brain Research Institute, UCLA, Los Angeles, CA 90095, USA Center for Interdisciplinary Research (ZiF), Universität Bielefeld, Bielefeld, Germany.
authors.forename: James W
authors.initials: JW
authors.lastname: Bisley
mesh_terms: D000200:Action Potentials; D000704:Analysis of Variance; D000818:Animals; D008253:Macaca mulatta; D008297:Male; D008839:Microelectrodes; D009043:Motor Activity / Q000502:physiology; D009474:Neurons / Q000502:physiology*; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000502:physiology*; D012438:Saccades / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors
keywords: LIP; attention; parietal cortex; perception; priority map; saliency map; spatial stability