| Pitch body orientation influences the perception of self-motion direction induced by optic flow. | |
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MedLine Citation:
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PMID: 20647031 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied the effect of static pitch body tilts on the perception of self-motion direction induced by a visual stimulus. Subjects were seated in front of a screen on which was projected a 3D cluster of moving dots visually simulating a forward motion of the observer with upward or downward directional biases (relative to a true earth horizontal direction). The subjects were tilted at various angles relative to gravity and were asked to estimate the direction of the perceived motion (nose-up, as during take-off or nose-down, as during landing). The data showed that body orientation proportionally affected the amount of error in the reported perceived direction (by 40% of body tilt magnitude in a range of +/-20 degrees) and these errors were systematically recorded in the direction of body tilt. As a consequence, a same visual stimulus was differently interpreted depending on body orientation. While the subjects were required to perform the task in a geocentric reference frame (i.e., relative to a gravity-related direction), they were obviously influenced by egocentric references. These results suggest that the perception of self-motion is not elaborated within an exclusive reference frame (either egocentric or geocentric) but rather results from the combined influence of both. |
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Authors:
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A Bourrelly; J-L Vercher; L Bringoux |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-18 |
Journal Detail:
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Title: Neuroscience letters Volume: 482 ISSN: 1872-7972 ISO Abbreviation: Neurosci. Lett. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-08-26 Completed Date: 2010-12-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7600130 Medline TA: Neurosci Lett Country: Ireland |
Other Details:
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Languages: eng Pagination: 193-7 Citation Subset: IM |
Copyright Information:
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(c) 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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UMR CNRS 6233, Institut des Sciences du Mouvement Etienne-Jules Marey, CNRS & Aix-Marseille Université, 163, avenue de Luminy, CP 910, 13288 Marseille, France. aurore.bourrelly@hotmail.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Humans Kinesthesis / physiology* Male Perception / physiology* Photic Stimulation Posture / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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