HapticV1, PascalFrancis, Corpus, bibRecord, 001092

Analysis of human postural responses to recoverable falls

Identifieur interne : 001092 ( PascalFrancis/Corpus ); précédent : 001091; suivant : 001093

Analysis of human postural responses to recoverable falls

Auteurs : S. B. Bortolami ; P. Dizio ; E. Rabin ; J. R. Lackner

Source :

Experimental brain research [ 0014-4819 ] ; 2003.

RBID : Pascal:04-0159388

Descripteurs français

Pascal (Inist)
- Posture, Cinématique, Perturbation, Force, Centre gravité, Gravité, Oscillation, Segment corporel, Membre inférieur, Rigidité, Articulation, Homme, Contrôle moteur, Perception haptique.

English descriptors

KwdEn :
- Body segment, Center of mass, Force, Gravity, Haptic perception, Human, Joint, Kinematics, Lower limb, Motor control, Oscillation, Perturbation, Posture, Stiffness.

Abstract

We studied the kinematics and kinetics of human postural responses to "recoverable falls." To induce brief falling we used a Hold and Release (H&R) paradigm. Standing subjects actively resisted a force applied to their sternum. When this force was quickly released they were suddenly off balance. For a brief period, 125 ms, until restoring forces were generated to shift the center of foot pressure in front of the center of mass, the body was in a forward fall acted on by gravity and ground support forces. We were able to describe the whole-body postural behavior following release using a multilink inverted pendulum model in a regime of "small oscillations." A three-segment model incorporating upper body, upper leg, and lower leg, with active stiffness and damping at the joints was fully adequate to fit the kinematic data from all conditions. The significance of our findings is that in situations involving recoverable falls or loss of balance the earliest responses are likely dependent on actively-tuned, reflexive mechanisms yielding stiffness and damping modulation of the joints. We demonstrate that haptic cues from index fingertip contact with a stationary surface lead to a significantly smaller angular displacement of the torso and a more rapid recovery of balance. Our H&R paradigm and associated model provide a quantifiable approach to studying recovery from potential falling in normal and clinical subjects.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A08	`01`	`1`	`ENG`	`@1 Analysis of human postural responses to recoverable falls`
A11	`01`	`1`		`@1 BORTOLAMI (S. B.)`
A11	`02`	`1`		`@1 DIZIO (P.)`
A11	`03`	`1`		`@1 RABIN (E.)`
A11	`04`	`1`		`@1 LACKNER (J. R.)`
A14	`01`			`@1 Ashton Graybiel Spatial Orientation Laboratory, Brandeis University @2 Waltham, MA 2454-9110 @3 USA @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut.`
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A23	`01`			`@0 ENG`
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C01	`01`		`ENG`	@0 We studied the kinematics and kinetics of human postural responses to "recoverable falls." To induce brief falling we used a Hold and Release (H&R) paradigm. Standing subjects actively resisted a force applied to their sternum. When this force was quickly released they were suddenly off balance. For a brief period, 125 ms, until restoring forces were generated to shift the center of foot pressure in front of the center of mass, the body was in a forward fall acted on by gravity and ground support forces. We were able to describe the whole-body postural behavior following release using a multilink inverted pendulum model in a regime of "small oscillations." A three-segment model incorporating upper body, upper leg, and lower leg, with active stiffness and damping at the joints was fully adequate to fit the kinematic data from all conditions. The significance of our findings is that in situations involving recoverable falls or loss of balance the earliest responses are likely dependent on actively-tuned, reflexive mechanisms yielding stiffness and damping modulation of the joints. We demonstrate that haptic cues from index fingertip contact with a stationary surface lead to a significantly smaller angular displacement of the torso and a more rapid recovery of balance. Our H&R paradigm and associated model provide a quantifiable approach to studying recovery from potential falling in normal and clinical subjects.
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C03	`07`	`X`	`ENG`	`@0 Oscillation @5 07`
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C03	`09`	`X`	`ENG`	`@0 Lower limb @5 10`
C03	`09`	`X`	`SPA`	`@0 Miembro inferior @5 10`
C03	`10`	`X`	`FRE`	`@0 Rigidité @5 11`
C03	`10`	`X`	`ENG`	`@0 Stiffness @5 11`
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C03	`14`	`X`	`FRE`	`@0 Perception haptique @4 CD @5 96`
C03	`14`	`X`	`ENG`	`@0 Haptic perception @4 CD @5 96`
C07	`01`	`X`	`FRE`	`@0 Système ostéoarticulaire @5 20`
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C07	`01`	`X`	`SPA`	`@0 Sistema osteoarticular @5 20`
N21				`@1 103`

Format Inist (serveur)

NO :	PASCAL 04-0159388 INIST
ET :	Analysis of human postural responses to recoverable falls
AU :	BORTOLAMI (S. B.); DIZIO (P.); RABIN (E.); LACKNER (J. R.)
AF :	Ashton Graybiel Spatial Orientation Laboratory, Brandeis University/Waltham, MA 2454-9110/Etats-Unis (1 aut., 2 aut., 3 aut., 4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Experimental brain research; ISSN 0014-4819; Coden EXBRAP; Allemagne; Da. 2003; Vol. 151; No. 3; Pp. 387-404; Bibl. 1 p.3/4
LA :	Anglais
EA :	We studied the kinematics and kinetics of human postural responses to "recoverable falls." To induce brief falling we used a Hold and Release (H&R) paradigm. Standing subjects actively resisted a force applied to their sternum. When this force was quickly released they were suddenly off balance. For a brief period, 125 ms, until restoring forces were generated to shift the center of foot pressure in front of the center of mass, the body was in a forward fall acted on by gravity and ground support forces. We were able to describe the whole-body postural behavior following release using a multilink inverted pendulum model in a regime of "small oscillations." A three-segment model incorporating upper body, upper leg, and lower leg, with active stiffness and damping at the joints was fully adequate to fit the kinematic data from all conditions. The significance of our findings is that in situations involving recoverable falls or loss of balance the earliest responses are likely dependent on actively-tuned, reflexive mechanisms yielding stiffness and damping modulation of the joints. We demonstrate that haptic cues from index fingertip contact with a stationary surface lead to a significantly smaller angular displacement of the torso and a more rapid recovery of balance. Our H&R paradigm and associated model provide a quantifiable approach to studying recovery from potential falling in normal and clinical subjects.
CC :	002A25E
FD :	Posture; Cinématique; Perturbation; Force; Centre gravité; Gravité; Oscillation; Segment corporel; Membre inférieur; Rigidité; Articulation; Homme; Contrôle moteur; Perception haptique
FG :	Système ostéoarticulaire
ED :	Posture; Kinematics; Perturbation; Force; Center of mass; Gravity; Oscillation; Body segment; Lower limb; Stiffness; Joint; Human; Motor control; Haptic perception
EG :	Osteoarticular system
SD :	Postura; Cinemática; Perturbación; Fuerza; Centro gravitacional; Gravedad; Oscilación; Segmento corporal; Miembro inferior; Rigidez; Articulación; Hombre; Control motor
LO :	INIST-12535.354000116267520120
ID :	04-0159388

Links to Exploration step

Pascal:04-0159388

Le document en format XML

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<front><div type="abstract" xml:lang="en">We studied the kinematics and kinetics of human postural responses to "recoverable falls." To induce brief falling we used a Hold and Release (H&R) paradigm. Standing subjects actively resisted a force applied to their sternum. When this force was quickly released they were suddenly off balance. For a brief period, 125 ms, until restoring forces were generated to shift the center of foot pressure in front of the center of mass, the body was in a forward fall acted on by gravity and ground support forces. We were able to describe the whole-body postural behavior following release using a multilink inverted pendulum model in a regime of "small oscillations." A three-segment model incorporating upper body, upper leg, and lower leg, with active stiffness and damping at the joints was fully adequate to fit the kinematic data from all conditions. The significance of our findings is that in situations involving recoverable falls or loss of balance the earliest responses are likely dependent on actively-tuned, reflexive mechanisms yielding stiffness and damping modulation of the joints. We demonstrate that haptic cues from index fingertip contact with a stationary surface lead to a significantly smaller angular displacement of the torso and a more rapid recovery of balance. Our H&R paradigm and associated model provide a quantifiable approach to studying recovery from potential falling in normal and clinical subjects.</div>
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<fC03 i1="08" i2="X" l="SPA"><s0>Segmento corporal</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Membre inférieur</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Lower limb</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Miembro inferior</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Rigidité</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Stiffness</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Rigidez</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Articulation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Joint</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Articulación</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Homme</s0>
<s5>54</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Human</s0>
<s5>54</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Hombre</s0>
<s5>54</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Contrôle moteur</s0>
<s5>57</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Motor control</s0>
<s5>57</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Control motor</s0>
<s5>57</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Perception haptique</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Haptic perception</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Système ostéoarticulaire</s0>
<s5>20</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Osteoarticular system</s0>
<s5>20</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Sistema osteoarticular</s0>
<s5>20</s5>
</fC07>
<fN21><s1>103</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 04-0159388 INIST</NO>
<ET>Analysis of human postural responses to recoverable falls</ET>
<AU>BORTOLAMI (S. B.); DIZIO (P.); RABIN (E.); LACKNER (J. R.)</AU>
<AF>Ashton Graybiel Spatial Orientation Laboratory, Brandeis University/Waltham, MA 2454-9110/Etats-Unis (1 aut., 2 aut., 3 aut., 4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Experimental brain research; ISSN 0014-4819; Coden EXBRAP; Allemagne; Da. 2003; Vol. 151; No. 3; Pp. 387-404; Bibl. 1 p.3/4</SO>
<LA>Anglais</LA>
<EA>We studied the kinematics and kinetics of human postural responses to "recoverable falls." To induce brief falling we used a Hold and Release (H&R) paradigm. Standing subjects actively resisted a force applied to their sternum. When this force was quickly released they were suddenly off balance. For a brief period, 125 ms, until restoring forces were generated to shift the center of foot pressure in front of the center of mass, the body was in a forward fall acted on by gravity and ground support forces. We were able to describe the whole-body postural behavior following release using a multilink inverted pendulum model in a regime of "small oscillations." A three-segment model incorporating upper body, upper leg, and lower leg, with active stiffness and damping at the joints was fully adequate to fit the kinematic data from all conditions. The significance of our findings is that in situations involving recoverable falls or loss of balance the earliest responses are likely dependent on actively-tuned, reflexive mechanisms yielding stiffness and damping modulation of the joints. We demonstrate that haptic cues from index fingertip contact with a stationary surface lead to a significantly smaller angular displacement of the torso and a more rapid recovery of balance. Our H&R paradigm and associated model provide a quantifiable approach to studying recovery from potential falling in normal and clinical subjects.</EA>
<CC>002A25E</CC>
<FD>Posture; Cinématique; Perturbation; Force; Centre gravité; Gravité; Oscillation; Segment corporel; Membre inférieur; Rigidité; Articulation; Homme; Contrôle moteur; Perception haptique</FD>
<FG>Système ostéoarticulaire</FG>
<ED>Posture; Kinematics; Perturbation; Force; Center of mass; Gravity; Oscillation; Body segment; Lower limb; Stiffness; Joint; Human; Motor control; Haptic perception</ED>
<EG>Osteoarticular system</EG>
<SD>Postura; Cinemática; Perturbación; Fuerza; Centro gravitacional; Gravedad; Oscilación; Segmento corporal; Miembro inferior; Rigidez; Articulación; Hombre; Control motor</SD>
<LO>INIST-12535.354000116267520120</LO>
<ID>04-0159388</ID>
</server>
</inist>
</record>

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Analysis of human postural responses to recoverable falls

Analysis of human postural responses to recoverable falls

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