Localization of the subjective vertical during roll, pitch, and recumbent yaw body tilt
Identifieur interne : 006067 ( Main/Exploration ); précédent : 006066; suivant : 006068Localization of the subjective vertical during roll, pitch, and recumbent yaw body tilt
Auteurs : Simone B. Bortolami [États-Unis] ; Alberto Pierobon [États-Unis] ; Paul Dizio [États-Unis] ; James R. Lackner [États-Unis]Source :
- Experimental brain research [ 0014-4819 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- MESH :
- physiology : Postural Balance, Posture, Reflex.
- Adult, Data Interpretation, Statistical, Female, Gravitation, Humans, Male, Middle Aged.
Abstract
Localization of the subjective vertical during body tilt in pitch and in roll has been extensively studied because of the relevance of these axes for aviation and control of posture. Studies of yaw orientation relative to gravity are lacking. Our goal was to perform the first thorough evaluation of static orientation in recumbent yaw and to collect as efficiently as possible roll and pitch orientation data which would be consistent with the literature, using the same technique as our yaw tests. This would create the first comprehensive, coherent data set for all three axes suitable for quantitative tridimensional modeling of spatial orientation. We tested localization of the vertical for subjects tilted in pitch (-100° to +130°), in roll (-90° to +90°), and in yaw while recumbent (-80° to + 80°). We had subjects point a gravity-neutral probe to the gravitational vertical (haptically indicated vertical) and report verbally their perceived tilt. Subjects underestimated their body tilts in recumbent yaw and pitch and overestimated their tilts in roll. The haptic settings for pitch and roll were consistent with data in the literature obtained with haptic and visual indications. Our data constitute the first tridimensional assessment of the subjective vertical using a common measurement procedure and provide the basis for the tri-axial modeling of vestibular function presented in the companion paper.
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Localization of the subjective vertical during body tilt in pitch and in roll has been extensively studied because of the relevance of these axes for aviation and control of posture. Studies of yaw orientation relative to gravity are lacking. Our goal was to perform the first thorough evaluation of static orientation in recumbent yaw and to collect as efficiently as possible roll and pitch orientation data which would be consistent with the literature, using the same technique as our yaw tests. This would create the first comprehensive, coherent data set for all three axes suitable for quantitative tridimensional modeling of spatial orientation. We tested localization of the vertical for subjects tilted in pitch (-100° to +130°), in roll (-90° to +90°), and in yaw while recumbent (-80° to + 80°). We had subjects point a gravity-neutral probe to the gravitational vertical (haptically indicated vertical) and report verbally their perceived tilt. Subjects underestimated their body tilts in recumbent yaw and pitch and overestimated their tilts in roll. The haptic settings for pitch and roll were consistent with data in the literature obtained with haptic and visual indications. Our data constitute the first tridimensional assessment of the subjective vertical using a common measurement procedure and provide the basis for the tri-axial modeling of vestibular function presented in the companion paper.</div>
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<name sortKey="Dizio, Paul" sort="Dizio, Paul" uniqKey="Dizio P" first="Paul" last="Dizio">Paul Dizio</name>
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<name sortKey="Lackner, James R" sort="Lackner, James R" uniqKey="Lackner J" first="James R." last="Lackner">James R. Lackner</name>
<name sortKey="Lackner, James R" sort="Lackner, James R" uniqKey="Lackner J" first="James R." last="Lackner">James R. Lackner</name>
<name sortKey="Pierobon, Alberto" sort="Pierobon, Alberto" uniqKey="Pierobon A" first="Alberto" last="Pierobon">Alberto Pierobon</name>
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