Early visual evoked potentials are modulated by eye position in humans induced by whole body rotations

BMC Neuroscience
Frédéric AnderssonLaurent Petit

Abstract

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. We showed that the amplitude of the initial C1 component of VEP, acknowledged to originate in V1, was modulated by the eye position. We also established that putative spontaneous small saccades related to eccentric fixation, as well as retinal disparity cannot explain the effects of changing C1 amplitude of VEP in the present study. The present modulation of the early component of VEP suggests an eye position-dependent activity of the human primary visual area. Our findings also evidence...Continue Reading

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Citations

Jun 20, 2014·Brain Structure & Function·Francesca StrappiniGordon L Shulman
Nov 8, 2006·Human Brain Mapping·Frédéric AnderssonLaurent Petit
Apr 23, 2009·Neuroreport·Qiang LiuHong-Jin Sun
Jun 12, 2010·Journal of Neurophysiology·M van ElkH Bekkering
Dec 4, 2019·Brain Structure & Function·Olena V BogdanovaBenoit R Cottereau

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