Audiogravic and oculogravic illusions represent a unified spatial remapping
Identifieur interne : 003F38 ( Main/Exploration ); précédent : 003F37; suivant : 003F39Audiogravic and oculogravic illusions represent a unified spatial remapping
Auteurs : James R. Lackner [États-Unis] ; Paul Dizio [États-Unis]Source :
- Experimental brain research [ 0014-4819 ] ; 2010.
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- Pascal (Inist)
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- topic : Homme.
English descriptors
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Abstract
Individuals exposed to both an increase in magnitude and a rotation of the gravitoinerital acceleration vector experience changes in visual and auditory localization and apparent body orientation. These effects are known as the oculogravic, audiogravic and somatogravic illusions, respectively. In our main experiment, we measured the magnitude, direction, and time course of the audiogravic and oculogravic illusions in recumbent subjects (n = 6) exposed to an increase to 2 g and a simultaneous 60° rotation of the gravitoinertial acceleration (GIA) vector in their azimuthal plane (around their z-axis) in the Brandeis slow rotation room. In separate runs, subjects used a pointer to indicate the apparent azimuthal location of auditory and visual targets and of their head midline. Parallel, time linked changes in auditory, visual, and haptic localization of comparable magnitude and direction occurred. Two additional subjects adjusted the onset asynchrony of a pair of pulsing tactors on the forehead until they experienced a fused, midline sensation. A vibrotactile shift occurred during exposure to altered GIA in the same direction as the auditory, visual, and haptic shifts. These parallel multimodal results point to a GIA-induced remapping of a peripersonal spatial referent as underlying the changes in localization of auditory, visual, and somatosensory stimuli. Vestibular, somatosensory, and oculomotor signals could contribute to the proposed shift in the reference system.
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Lackner</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Ashton Graybiel Spatial Orientation Laboratory, MS 033, Brandeis University</s1><s2>Waltham, MA 02454-9110</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Dizio, Paul" sort="Dizio, Paul" uniqKey="Dizio P" first="Paul" last="Dizio">Paul Dizio</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Ashton Graybiel Spatial Orientation Laboratory, MS 033, Brandeis University</s1><s2>Waltham, MA 02454-9110</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0202491</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 10-0202491 INIST</idno><idno type="RBID">Pascal:10-0202491</idno><idno type="wicri:Area/PascalFrancis/Corpus">000636</idno><idno type="wicri:Area/PascalFrancis/Curation">000D69</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000500</idno><idno type="wicri:doubleKey">0014-4819:2010:Lackner J:audiogravic:and:oculogravic</idno><idno type="wicri:Area/Main/Merge">003F99</idno><idno type="wicri:Area/Main/Curation">003F38</idno><idno type="wicri:Area/Main/Exploration">003F38</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Audiogravic and oculogravic illusions represent a unified spatial remapping</title><author><name sortKey="Lackner, James R" sort="Lackner, James R" uniqKey="Lackner J" first="James R." last="Lackner">James R. Lackner</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Ashton Graybiel Spatial Orientation Laboratory, MS 033, Brandeis University</s1><s2>Waltham, MA 02454-9110</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author><author><name sortKey="Dizio, Paul" sort="Dizio, Paul" uniqKey="Dizio P" first="Paul" last="Dizio">Paul Dizio</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Ashton Graybiel Spatial Orientation Laboratory, MS 033, Brandeis University</s1><s2>Waltham, MA 02454-9110</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Massachusetts</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Experimental brain research</title><title level="j" type="abbreviated">Exp. brain res.</title><idno type="ISSN">0014-4819</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Experimental brain research</title><title level="j" type="abbreviated">Exp. brain res.</title><idno type="ISSN">0014-4819</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acceleration</term><term>Haptic perception</term><term>Human</term><term>Perceptual illusion</term><term>Rotation</term><term>Sensation</term><term>Spatial orientation</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Illusion perceptive</term><term>Rotation</term><term>Accélération</term><term>Orientation spatiale</term><term>Sensation</term><term>Homme</term><term>Perception haptique</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Individuals exposed to both an increase in magnitude and a rotation of the gravitoinerital acceleration vector experience changes in visual and auditory localization and apparent body orientation. These effects are known as the oculogravic, audiogravic and somatogravic illusions, respectively. In our main experiment, we measured the magnitude, direction, and time course of the audiogravic and oculogravic illusions in recumbent subjects (n = 6) exposed to an increase to 2 g and a simultaneous 60° rotation of the gravitoinertial acceleration (GIA) vector in their azimuthal plane (around their z-axis) in the Brandeis slow rotation room. In separate runs, subjects used a pointer to indicate the apparent azimuthal location of auditory and visual targets and of their head midline. Parallel, time linked changes in auditory, visual, and haptic localization of comparable magnitude and direction occurred. Two additional subjects adjusted the onset asynchrony of a pair of pulsing tactors on the forehead until they experienced a fused, midline sensation. A vibrotactile shift occurred during exposure to altered GIA in the same direction as the auditory, visual, and haptic shifts. These parallel multimodal results point to a GIA-induced remapping of a peripersonal spatial referent as underlying the changes in localization of auditory, visual, and somatosensory stimuli. Vestibular, somatosensory, and oculomotor signals could contribute to the proposed shift in the reference system.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Massachusetts</li></region></list><tree><country name="États-Unis"><region name="Massachusetts"><name sortKey="Lackner, James R" sort="Lackner, James R" uniqKey="Lackner J" first="James R." last="Lackner">James R. Lackner</name></region><name sortKey="Dizio, Paul" sort="Dizio, Paul" uniqKey="Dizio P" first="Paul" last="Dizio">Paul Dizio</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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