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Spatiotopic coding and remapping in humans
Authors:Burr David C  Morrone Maria Concetta
Institution:1Department of Psychology, University of Florence, Via di San Salvi 12, Florence 50135, Italy;2CNR Institute of Neurosciences, Via Moruzzi 1, Pisa, 56100, Italy;3Department of Physiological Sciences, University of Pisa, Via S. Zeno, 31, Pisa 56127, Italy;4Fondazione Stella Maris, Viale del Tirreno 331, Calambrone 56018, Pisa, Italy
Abstract:How our perceptual experience of the world remains stable and continuous in the face of continuous rapid eye movements still remains a mystery. This review discusses some recent progress towards understanding the neural and psychophysical processes that accompany these eye movements. We firstly report recent evidence from imaging studies in humans showing that many brain regions are tuned in spatiotopic coordinates, but only for items that are actively attended. We then describe a series of experiments measuring the spatial and temporal phenomena that occur around the time of saccades, and discuss how these could be related to visual stability. Finally, we introduce the concept of the spatio-temporal receptive field to describe the local spatiotopicity exhibited by many neurons when the eyes move.
Keywords:vision  eye movements  spatiotopicity  remapping
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