HapticV1, PascalFrancis, Curation, bibRecord, 000819

Time course of haptic stabilization of posture

Identifieur interne : 000819 ( PascalFrancis/Curation ); précédent : 000818; suivant : 000820

Time course of haptic stabilization of posture

Auteurs : Ely Rabin [États-Unis] ; Paul Dizio [États-Unis] ; James R. Lackner [États-Unis]

Source :

Experimental brain research [ 0014-4819 ] ; 2006.

RBID : Pascal:06-0335329

Descripteurs français

Pascal (Inist)
- Stabilisation, Posture, Orteil, Force, Constante temps, Proprioception, Homme, Perception haptique.
Wicri :
- topic : Homme.

English descriptors

KwdEn :
- Force, Haptic perception, Human, Posture, Proprioception, Stabilization, Time constant, Toe.

Abstract

Contact of the index finger with a stable surface greatly attenuates postural sway in blindfolded subjects. The time course of postural stabilization was measured after subjects made finger contact with a surface. Subjects (n= 12) were tested standing in a heel-to-toe stance in 25 s duration trials. The subject stood with the index finger above but not contacting a laterally placed surface, and made finger contact when cued midway through the trial. Fingertip contact forces stabilized with a time constant of less than 0.5 s and postural stabilization occurred rapidly following fingertip contact. Sway amplitude of center of pressure of the feet decreased by half with a time constant of less than 1.6 s. The stereotypical pattern of force changes at the fingertip leading correlated changes in center of pressure by ∼300 ms was evident within the first 0.5 s of finger contact. We conclude that the fingertip can serve as a sensory-motor probe that is stabilized nearly immediately on contact with a surface and that from the moment of contact the fingertip contributes sensory signals used to control sway.

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A11	`01`	`1`		`@1 RABIN (Ely)`
A11	`02`	`1`		`@1 DIZIO (Paul)`
A11	`03`	`1`		`@1 LACKNER (James R.)`
A14	`01`			`@1 New York College of Osteopathic Medicine of New York, Institute of Technology, Northern Boulevard @2 Old Westbury, NY 11568-8000 @3 USA @Z 1 aut.`
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C01	`01`		`ENG`	@0 Contact of the index finger with a stable surface greatly attenuates postural sway in blindfolded subjects. The time course of postural stabilization was measured after subjects made finger contact with a surface. Subjects (n= 12) were tested standing in a heel-to-toe stance in 25 s duration trials. The subject stood with the index finger above but not contacting a laterally placed surface, and made finger contact when cued midway through the trial. Fingertip contact forces stabilized with a time constant of less than 0.5 s and postural stabilization occurred rapidly following fingertip contact. Sway amplitude of center of pressure of the feet decreased by half with a time constant of less than 1.6 s. The stereotypical pattern of force changes at the fingertip leading correlated changes in center of pressure by ∼300 ms was evident within the first 0.5 s of finger contact. We conclude that the fingertip can serve as a sensory-motor probe that is stabilized nearly immediately on contact with a surface and that from the moment of contact the fingertip contributes sensory signals used to control sway.
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C03	`01`	`X`	`SPA`	`@0 Estabilización @5 01`
C03	`02`	`X`	`FRE`	`@0 Posture @5 02`
C03	`02`	`X`	`ENG`	`@0 Posture @5 02`
C03	`02`	`X`	`SPA`	`@0 Postura @5 02`
C03	`03`	`X`	`FRE`	`@0 Orteil @5 03`
C03	`03`	`X`	`ENG`	`@0 Toe @5 03`
C03	`03`	`X`	`SPA`	`@0 Ortejo @5 03`
C03	`04`	`X`	`FRE`	`@0 Force @5 04`
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C03	`04`	`X`	`SPA`	`@0 Fuerza @5 04`
C03	`05`	`X`	`FRE`	`@0 Constante temps @5 05`
C03	`05`	`X`	`ENG`	`@0 Time constant @5 05`
C03	`05`	`X`	`SPA`	`@0 Constante tiempo @5 05`
C03	`06`	`X`	`FRE`	`@0 Proprioception @5 06`
C03	`06`	`X`	`ENG`	`@0 Proprioception @5 06`
C03	`06`	`X`	`SPA`	`@0 Propiocepción @5 06`
C03	`07`	`X`	`FRE`	`@0 Homme @5 54`
C03	`07`	`X`	`ENG`	`@0 Human @5 54`
C03	`07`	`X`	`SPA`	`@0 Hombre @5 54`
C03	`08`	`X`	`FRE`	`@0 Perception haptique @4 CD @5 96`
C03	`08`	`X`	`ENG`	`@0 Haptic perception @4 CD @5 96`
N21				`@1 219`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

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Pascal:06-0335329

Le document en format XML

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<front><div type="abstract" xml:lang="en">Contact of the index finger with a stable surface greatly attenuates postural sway in blindfolded subjects. The time course of postural stabilization was measured after subjects made finger contact with a surface. Subjects (n= 12) were tested standing in a heel-to-toe stance in 25 s duration trials. The subject stood with the index finger above but not contacting a laterally placed surface, and made finger contact when cued midway through the trial. Fingertip contact forces stabilized with a time constant of less than 0.5 s and postural stabilization occurred rapidly following fingertip contact. Sway amplitude of center of pressure of the feet decreased by half with a time constant of less than 1.6 s. The stereotypical pattern of force changes at the fingertip leading correlated changes in center of pressure by ∼300 ms was evident within the first 0.5 s of finger contact. We conclude that the fingertip can serve as a sensory-motor probe that is stabilized nearly immediately on contact with a surface and that from the moment of contact the fingertip contributes sensory signals used to control sway.</div>
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Time course of haptic stabilization of posture

Time course of haptic stabilization of posture

Source :

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

Le document en format XML

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