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Electrophysiological correlates of presaccadic remapping in humans
Author(s) -
Parks Nathan A.,
Corballis Paul M.
Publication year - 2008
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2008.00669.x
Subject(s) - psychology , saccade , stimulus (psychology) , visual space , saccadic masking , visual field , electrophysiology , eye movement , meridian (astronomy) , visual n1 , neuroscience , saccadic suppression of image displacement , event related potential , visual perception , cognitive psychology , communication , electroencephalography , perception , physics , astronomy
Saccadic eye movements cause rapid displacements of space, yet the visual field is perceived as stable. A mechanism that may contribute to maintaining visual stability is the process of predictive remapping, in which receptive fields shift to their future locations prior to the onset of a saccade. We investigated electrophysiological correlates of remapping in humans using event‐related potentials. Subjects made horizontal saccades that caused a visual stimulus to remain within a single visual field or to cross the vertical meridian, shifting between visual hemifields. When an impending saccade would shift the stimulus between visual fields (requiring remapping between cerebral hemispheres), presaccadic potentials showed increased bilaterality, having greater amplitudes over the hemisphere ipsilateral to the grating stimulus. Results are consistent with interhemispheric remapping of visual space in anticipation of an upcoming saccade.