| Explaining away the body: experiences of supernaturally caused touch and touch on non-hand objects within the rubber hand illusion. | |
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MedLine Citation:
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PMID: 20195378 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: In rubber hand illusions and full body illusions, touch sensations are projected to non-body objects such as rubber hands, dolls or virtual bodies. The robustness, limits and further perceptual consequences of such illusions are not yet fully explored or understood. A number of experiments are reported that test the limits of a variant of the rubber hand illusion. METHODOLOGY/PRINCIPAL FINDINGS: A variant of the rubber hand illusion is explored, in which the real and foreign hands are aligned in personal space. The presence of the illusion is ascertained with participants' scores and temperature changes of the real arm. This generates a basic illusion of touch projected to a foreign arm. Participants are presented with further, unusual visuotactile stimuli subsequent to onset of the basic illusion. Such further visuotactile stimulation is found to generate very unusual experiences of supernatural touch and touch on a non-hand object. The finding of touch on a non-hand object conflicts with prior findings, and to resolve this conflict a further hypothesis is successfully tested: that without prior onset of the basic illusion this unusual experience does not occur. CONCLUSIONS/SIGNIFICANCE: A rubber hand illusion is found that can arise when the real and the foreign arm are aligned in personal space. This illusion persists through periods of no tactile stimulation and is strong enough to allow very unusual experiences of touch felt on a cardboard box and experiences of touch produced at a distance, as if by supernatural causation. These findings suggest that one's visual body image is explained away during experience of the illusion and they may be of further importance to understanding the role of experience in delusion formation. The findings of touch on non-hand objects may help reconcile conflicting results in this area of research. In addition, new evidence is provided that relates to the recently discovered psychologically induced temperature changes that occur during the illusion. |
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Authors:
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Jakob Hohwy; Bryan Paton |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-24 |
Journal Detail:
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Title: PloS one Volume: 5 ISSN: 1932-6203 ISO Abbreviation: PLoS ONE Publication Date: 2010 |
Date Detail:
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Created Date: 2010-03-02 Completed Date: 2010-09-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101285081 Medline TA: PLoS One Country: United States |
Other Details:
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Languages: eng Pagination: e9416 Citation Subset: IM |
Affiliation:
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Philosophy Program, Monash University, Clayton, Victoria, Australia. Jakob.Hohwy@arts.monash.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Artificial Limbs Body Image* Female Form Perception / physiology Hand / physiology Humans Illusions / physiology*, psychology Male Middle Aged Proprioception / physiology Psychomotor Performance / physiology Questionnaires Rubber Skin Temperature Space Perception / physiology Touch / physiology Touch Perception / physiology* Visual Perception / physiology* Young Adult |
| Chemical | |
Reg. No./Substance:
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9006-04-6/Rubber |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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