Early visual evoked potentials are modulated by eye position in humans induced by whole body rotations |
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Authors: | Frédéric?Andersson Olivier?Etard Pierre?Denise Email author" target="_blank">Laurent?PetitEmail author |
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Institution: | 1.Groupe d'Imagerie Neurofonctionnelle (GIN) UMR6194,CNRS-CEA-University of Caen and Paris 5, GIP CYCERON,Caen,France;2.Service d'Explorations du Système Nerveux, CHU Caen,Caen,France |
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Abstract: | Background To reach and grasp an object in space on the basis of its image cast on the retina requires different coordinate transformations
that take into account gaze and limb positioning. Eye position in the orbit influences the image's conversion from retinotopic
(eye-centered) coordinates to an egocentric frame necessary for guiding action. Neuroimaging studies have revealed eye position-dependent
activity in extrastriate visual, parietal and frontal areas that is along the visuo-motor pathway. At the earliest vision
stage, the role of the primary visual area (V1) in this process remains unclear. We used an experimental design based on pattern-onset
visual evoked potentials (VEP) recordings to study the effect of eye position on V1 activity in humans. |
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