Evidence for an eye-centered spherical representation of the visuomotor map.
During visually guided movement, visual coordinates of target location must be transformed into coordinates appropriate for movement. To investigate the representation of this visuomotor coordinate transformation, we examined changes in pointing behavior induced by a local visuomotor remapping. The visual feedback of finger position was limited to one location within the workspace, at which a discrepancy was introduced between the actual and visually perceived finger position. This remapping induced a change in pointing that extended over the entire workspace and was best captured by a spherical coordinate system centered near the eyes.
Sobell Department of Neurophysiology, Institute of Neurology, London WC1N 3BG United Kingdom.
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Vetter
S J
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Goodbody
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DM
Wolpert
D000328:Adult; D001519:Behavior / Q000502:physiology; D005260:Female; D005385:Fingers / Q000502:physiology; D006801:Humans; D008297:Male; D009799:Ocular Physiological Phenomena; D010775:Photic Stimulation; D011434:Proprioception / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*