HapticV1, Main, Exploration, bibRecord, 005992

Is backward disequilibrium in the elderly caused by an abnormal perception of verticality? A pilot study

Identifieur interne : 005992 ( Main/Exploration ); précédent : 005991; suivant : 005993

Is backward disequilibrium in the elderly caused by an abnormal perception of verticality? A pilot study

Auteurs : Patrick Manckoundia [France] ; France Mourey [France] ; Pierre Pfitzenmeyer [France] ; Jacques Van Hoecke [France] ; Dominic Perennou [France]

Source :

Clinical neurophysiology [ 1388-2457 ] ; 2007.

RBID : Pascal:07-0167345

Descripteurs français

Pascal (Inist)
- Verticalité, Centre gravité, Inclinaison, Posture, Gravité, Electrodiagnostic, Personne âgée, Perception haptique.
Wicri :
- topic : Personne âgée.

English descriptors

KwdEn :
- Accidental Falls, Aged, 80 and over, Center of mass, Elderly, Electrodiagnosis, Geriatric Assessment, Gravity, Haptic perception, Humans, Pilot Projects, Postural Balance (physiology), Posture, Posture (physiology), Severity of Illness Index, Tilt, Verticality, Vestibular Diseases (etiology), Vestibular Function Tests, Visual Perception (physiology).
MESH :
- etiology : Vestibular Diseases.
- physiology : Postural Balance, Posture, Visual Perception.
- Accidental Falls, Aged, 80 and over, Geriatric Assessment, Humans, Pilot Projects, Severity of Illness Index, Vestibular Function Tests.

Abstract

Objective: We hypothesised that backward disequilibrium (BD), defined by a posterior position of the centre of mass with respect to the base of support, could be caused by a backward tilt in the perception of verticality. Methods: The relationship between BD, the perception of verticality, and the history of falls in 25 subjects aged 84.5 ± 7.4 years was analysed. An original ordinal scale, the BD scale (BDS), was used to quantify BD. Postural (PV) and haptic verticals (HV) were measured in sagittal plane. Results: BDS scores closely correlated with the number of falls (r = 0.81, p = 10^-5). The more the PV was tilted backward, the greater the BDS scores (r = -0.95, p < 10^-6), with a huge backward tilt of about 15° in 4 subjects with severe BD. In these subjects, the tilt in perception of verticality was transmodal since a severe backward HV tilt was also found. Conclusions: This transmodality suggested high-order cognitive disruption in the construction of the subjective vertical used in postural control by subjects showing BD, which confirmed our hypothesis. Significance: This study clearly shows that perception and action with respect to gravity are closely related and brings a new insight about fall mechanisms in the elderly.

Url:

https://hal.archives-ouvertes.fr/hal-00775982

Affiliations:

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Accidental Falls</term>
<term>Aged, 80 and over</term>
<term>Center of mass</term>
<term>Elderly</term>
<term>Electrodiagnosis</term>
<term>Geriatric Assessment</term>
<term>Gravity</term>
<term>Haptic perception</term>
<term>Humans</term>
<term>Pilot Projects</term>
<term>Postural Balance (physiology)</term>
<term>Posture</term>
<term>Posture (physiology)</term>
<term>Severity of Illness Index</term>
<term>Tilt</term>
<term>Verticality</term>
<term>Vestibular Diseases (etiology)</term>
<term>Vestibular Function Tests</term>
<term>Visual Perception (physiology)</term>
</keywords>
<keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Vestibular Diseases</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Postural Balance</term>
<term>Posture</term>
<term>Visual Perception</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Accidental Falls</term>
<term>Aged, 80 and over</term>
<term>Geriatric Assessment</term>
<term>Humans</term>
<term>Pilot Projects</term>
<term>Severity of Illness Index</term>
<term>Vestibular Function Tests</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Verticalité</term>
<term>Centre gravité</term>
<term>Inclinaison</term>
<term>Posture</term>
<term>Gravité</term>
<term>Electrodiagnostic</term>
<term>Personne âgée</term>
<term>Perception haptique</term>
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<front><div type="abstract" xml:lang="en">Objective: We hypothesised that backward disequilibrium (BD), defined by a posterior position of the centre of mass with respect to the base of support, could be caused by a backward tilt in the perception of verticality. Methods: The relationship between BD, the perception of verticality, and the history of falls in 25 subjects aged 84.5 ± 7.4 years was analysed. An original ordinal scale, the BD scale (BDS), was used to quantify BD. Postural (PV) and haptic verticals (HV) were measured in sagittal plane. Results: BDS scores closely correlated with the number of falls (r = 0.81, p = 10<sup>-5</sup>
). The more the PV was tilted backward, the greater the BDS scores (r = -0.95, p < 10<sup>-6</sup>
), with a huge backward tilt of about 15° in 4 subjects with severe BD. In these subjects, the tilt in perception of verticality was transmodal since a severe backward HV tilt was also found. Conclusions: This transmodality suggested high-order cognitive disruption in the construction of the subjective vertical used in postural control by subjects showing BD, which confirmed our hypothesis. Significance: This study clearly shows that perception and action with respect to gravity are closely related and brings a new insight about fall mechanisms in the elderly.</div>
</front>
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<affiliations><list><country><li>France</li>
</country>
<region><li>Région Bourgogne</li>
</region>
<settlement><li>Dijon</li>
</settlement>
<orgName><li>Université de Bourgogne</li>
</orgName>
</list>
<tree><country name="France"><noRegion><name sortKey="Manckoundia, Patrick" sort="Manckoundia, Patrick" uniqKey="Manckoundia P" first="Patrick" last="Manckoundia">Patrick Manckoundia</name>
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<name sortKey="Manckoundia, Patrick" sort="Manckoundia, Patrick" uniqKey="Manckoundia P" first="Patrick" last="Manckoundia">Patrick Manckoundia</name>
<name sortKey="Mourey, France" sort="Mourey, France" uniqKey="Mourey F" first="France" last="Mourey">France Mourey</name>
<name sortKey="Mourey, France" sort="Mourey, France" uniqKey="Mourey F" first="France" last="Mourey">France Mourey</name>
<name sortKey="Perennou, Dominic" sort="Perennou, Dominic" uniqKey="Perennou D" first="Dominic" last="Perennou">Dominic Perennou</name>
<name sortKey="Perennou, Dominic" sort="Perennou, Dominic" uniqKey="Perennou D" first="Dominic" last="Perennou">Dominic Perennou</name>
<name sortKey="Pfitzenmeyer, Pierre" sort="Pfitzenmeyer, Pierre" uniqKey="Pfitzenmeyer P" first="Pierre" last="Pfitzenmeyer">Pierre Pfitzenmeyer</name>
<name sortKey="Pfitzenmeyer, Pierre" sort="Pfitzenmeyer, Pierre" uniqKey="Pfitzenmeyer P" first="Pierre" last="Pfitzenmeyer">Pierre Pfitzenmeyer</name>
<name sortKey="Van Hoecke, Jacques" sort="Van Hoecke, Jacques" uniqKey="Van Hoecke J" first="Jacques" last="Van Hoecke">Jacques Van Hoecke</name>
</country>
</tree>
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</record>

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Is backward disequilibrium in the elderly caused by an abnormal perception of verticality? A pilot study

Is backward disequilibrium in the elderly caused by an abnormal perception of verticality? A pilot study

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