title: Both developmental and adult vision shape body representations.
abstract: Sense of body ownership and body representation are fundamental parts of human consciousness, but the contribution of the visual modality to their development remains unclear. We tested congenitally and late blind adults on a somatosensory version of the rubber hand illusion, and on the Aristotle illusion, in which sighted controls touching a single sphere with crossed fingers commonly report perceiving two. We found that congenitally and late blind individuals did not report subjectively experiencing the rubber hand illusion. However, in an objective measure, the congenitally blind did not show a recalibration of the position of their hand towards the rubber hand while late blind and sighted individuals did. By contrast, all groups experienced the Aristotle illusion. This pattern of results provides evidence for a dissociation of the concepts of body ownership and spatial recalibration and, furthermore, suggests different reference frames for hands (external space) and fingers (anatomical space).
authors.affiliation: Biopsychology and Neuropsychology, University of Hamburg, Von-Melle-Park 11, 20146 Hamburg, Germany.
authors.forename: Elena
authors.initials: E
authors.lastname: Nava
authors.affiliation: Department of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
authors.forename: Tineke
authors.initials: T
authors.lastname: Steiger
authors.affiliation: Biopsychology and Neuropsychology, University of Hamburg, Von-Melle-Park 11, 20146 Hamburg, Germany.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Röder
mesh_terms: D000328:Adult; D001766:Blindness; D001828:Body Image / Q000523:psychology*; D003243:Consciousness / Q000502:physiology*; D006801:Humans; D007088:Illusions / Q000502:physiology / Q000523:psychology; D012408:Rubber; D012677:Sensation / Q000502:physiology*; D014110:Touch / Q000502:physiology*
chemical_list: D012408:Rubber