Visual and proprioceptive shifts in perceived egocentric direction induced by eye-position.
The relation of three main effects of eye-position on perceived direction was investigated using a method of hand pointing in the horizontal plane: (1) Retinal eccentricity is overestimated with respect to the fovea by a constant factor of 2.6 degrees; (2) an extraretinal signal induces a shift in perceived visual direction (slope 0.12) that is opposite to the direction of eccentric gaze; and (3) the perceived position of the median plane of the head shifts toward the direction of eccentric eye-position (slope 0.23) while perceived trunk position remains unchanged.
Lewald
J
J
Institut für Arbeitsphysiologie, Universität Dortmund, Germany. joerg.lewald@ruhr-uni-bochum.de
Ehrenstein
W H
WH
D000328:Adult; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010296:Parietal Lobe / Q000502:physiology; D011434:Proprioception / Q000502:physiology*; D011601:Psychophysics; D013028:Space Perception / Q000502:physiology*