La maladie de Parkinson en France (serveur d'exploration)

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Abnormal reciprocal inhibition between antagonist muscles in Parkinson's disease

Identifieur interne : 001395 ( PascalFrancis/Corpus ); précédent : 001394; suivant : 001396

Abnormal reciprocal inhibition between antagonist muscles in Parkinson's disease

Auteurs : S. Meunier ; S. Pol ; J. L. Houeto ; M. Vidailhet

Source :

RBID : Pascal:00-0238978

Descripteurs français

English descriptors

Abstract

Disynaptic Ia reciprocal inhibition acts, at the spinal level, by actively inhibiting antagonist motor neurons and reducing the inhibition of agonist motor neurons. The deactivation of this pathway in Parkinson's disease is still debated. Disynaptic reciprocal inhibition of H reflexes in the forearm flexor muscles was examined in 15 control subjects and 16 treated parkinsonian patients at rest and at the onset of a voluntary wrist flexion. Two patients were reassessed 18 h after withdrawal of antiparkinsonian medication. At rest, the level of Ia reciprocal inhibition between the wrist antagonist muscles was not significantly different between patients and controls. In contrast, clear abnormalities of this inhibition were revealed by voluntary movements in the patients. In normal subjects, at the onset of a wrist flexion, Ia reciprocal inhibition showed a large decrease, and we argue that this decrease is supraspinal in origin. On the less affected sides of the patients the descending modulation was still present but lower than in controls; on the more affected sides this modulation had vanished almost completely. These movement-induced abnormalities of disynaptic Ia reciprocal inhibition were closely associated with Parkinson's disease but were probably not dependent on L-dopa. They could play a role in the disturbances of precise voluntary movements observed in Parkinson's disease.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A08 01  1  ENG  @1 Abnormal reciprocal inhibition between antagonist muscles in Parkinson's disease
A11 01  1    @1 MEUNIER (S.)
A11 02  1    @1 POL (S.)
A11 03  1    @1 HOUETO (J. L.)
A11 04  1    @1 VIDAILHET (M.)
A14 01      @1 Clinical Neurophysiology, Réeducation, Hôpital de la Salpêtrière @2 Paris @3 FRA @Z 1 aut. @Z 2 aut.
A14 02      @1 INSERM U289, Hôpital de la Salpêtrière @2 Paris @3 FRA @Z 3 aut. @Z 4 aut.
A14 03      @1 Department of Neurology, Hopital Saint Antoine @2 Paris @3 FRA @Z 4 aut.
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C01 01    ENG  @0 Disynaptic Ia reciprocal inhibition acts, at the spinal level, by actively inhibiting antagonist motor neurons and reducing the inhibition of agonist motor neurons. The deactivation of this pathway in Parkinson's disease is still debated. Disynaptic reciprocal inhibition of H reflexes in the forearm flexor muscles was examined in 15 control subjects and 16 treated parkinsonian patients at rest and at the onset of a voluntary wrist flexion. Two patients were reassessed 18 h after withdrawal of antiparkinsonian medication. At rest, the level of Ia reciprocal inhibition between the wrist antagonist muscles was not significantly different between patients and controls. In contrast, clear abnormalities of this inhibition were revealed by voluntary movements in the patients. In normal subjects, at the onset of a wrist flexion, Ia reciprocal inhibition showed a large decrease, and we argue that this decrease is supraspinal in origin. On the less affected sides of the patients the descending modulation was still present but lower than in controls; on the more affected sides this modulation had vanished almost completely. These movement-induced abnormalities of disynaptic Ia reciprocal inhibition were closely associated with Parkinson's disease but were probably not dependent on L-dopa. They could play a role in the disturbances of precise voluntary movements observed in Parkinson's disease.
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N21       @1 164

Format Inist (serveur)

NO : PASCAL 00-0238978 INIST
ET : Abnormal reciprocal inhibition between antagonist muscles in Parkinson's disease
AU : MEUNIER (S.); POL (S.); HOUETO (J. L.); VIDAILHET (M.)
AF : Clinical Neurophysiology, Réeducation, Hôpital de la Salpêtrière/Paris/France (1 aut., 2 aut.); INSERM U289, Hôpital de la Salpêtrière/Paris/France (3 aut., 4 aut.); Department of Neurology, Hopital Saint Antoine/Paris/France (4 aut.)
DT : Publication en série; Niveau analytique
SO : Brain; ISSN 0006-8950; Royaume-Uni; Da. 2000; Vol. 123; No. p.5; Pp. 1017-1026; Bibl. 1 p.1/4
LA : Anglais
EA : Disynaptic Ia reciprocal inhibition acts, at the spinal level, by actively inhibiting antagonist motor neurons and reducing the inhibition of agonist motor neurons. The deactivation of this pathway in Parkinson's disease is still debated. Disynaptic reciprocal inhibition of H reflexes in the forearm flexor muscles was examined in 15 control subjects and 16 treated parkinsonian patients at rest and at the onset of a voluntary wrist flexion. Two patients were reassessed 18 h after withdrawal of antiparkinsonian medication. At rest, the level of Ia reciprocal inhibition between the wrist antagonist muscles was not significantly different between patients and controls. In contrast, clear abnormalities of this inhibition were revealed by voluntary movements in the patients. In normal subjects, at the onset of a wrist flexion, Ia reciprocal inhibition showed a large decrease, and we argue that this decrease is supraspinal in origin. On the less affected sides of the patients the descending modulation was still present but lower than in controls; on the more affected sides this modulation had vanished almost completely. These movement-induced abnormalities of disynaptic Ia reciprocal inhibition were closely associated with Parkinson's disease but were probably not dependent on L-dopa. They could play a role in the disturbances of precise voluntary movements observed in Parkinson's disease.
CC : 002B17G
FD : Parkinson maladie; Inhibition réciproque; Réflexe H; Exploration; Homme
FG : Système nerveux pathologie; Système nerveux central pathologie; Encéphale pathologie; Extrapyramidal syndrome; Maladie dégénérative
ED : Parkinson disease; Reciprocal inhibition; H-Reflex; Exploration; Human
EG : Nervous system diseases; Central nervous system disease; Cerebral disorder; Extrapyramidal syndrome; Degenerative disease
SD : Parkinson enfermedad; Inhibición recíproca; Reflejo H; Exploración; Hombre
LO : INIST-998.354000087566380150
ID : 00-0238978

Links to Exploration step

Pascal:00-0238978

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<AU>MEUNIER (S.); POL (S.); HOUETO (J. L.); VIDAILHET (M.)</AU>
<AF>Clinical Neurophysiology, Réeducation, Hôpital de la Salpêtrière/Paris/France (1 aut., 2 aut.); INSERM U289, Hôpital de la Salpêtrière/Paris/France (3 aut., 4 aut.); Department of Neurology, Hopital Saint Antoine/Paris/France (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Brain; ISSN 0006-8950; Royaume-Uni; Da. 2000; Vol. 123; No. p.5; Pp. 1017-1026; Bibl. 1 p.1/4</SO>
<LA>Anglais</LA>
<EA>Disynaptic Ia reciprocal inhibition acts, at the spinal level, by actively inhibiting antagonist motor neurons and reducing the inhibition of agonist motor neurons. The deactivation of this pathway in Parkinson's disease is still debated. Disynaptic reciprocal inhibition of H reflexes in the forearm flexor muscles was examined in 15 control subjects and 16 treated parkinsonian patients at rest and at the onset of a voluntary wrist flexion. Two patients were reassessed 18 h after withdrawal of antiparkinsonian medication. At rest, the level of Ia reciprocal inhibition between the wrist antagonist muscles was not significantly different between patients and controls. In contrast, clear abnormalities of this inhibition were revealed by voluntary movements in the patients. In normal subjects, at the onset of a wrist flexion, Ia reciprocal inhibition showed a large decrease, and we argue that this decrease is supraspinal in origin. On the less affected sides of the patients the descending modulation was still present but lower than in controls; on the more affected sides this modulation had vanished almost completely. These movement-induced abnormalities of disynaptic Ia reciprocal inhibition were closely associated with Parkinson's disease but were probably not dependent on L-dopa. They could play a role in the disturbances of precise voluntary movements observed in Parkinson's disease.</EA>
<CC>002B17G</CC>
<FD>Parkinson maladie; Inhibition réciproque; Réflexe H; Exploration; Homme</FD>
<FG>Système nerveux pathologie; Système nerveux central pathologie; Encéphale pathologie; Extrapyramidal syndrome; Maladie dégénérative</FG>
<ED>Parkinson disease; Reciprocal inhibition; H-Reflex; Exploration; Human</ED>
<EG>Nervous system diseases; Central nervous system disease; Cerebral disorder; Extrapyramidal syndrome; Degenerative disease</EG>
<SD>Parkinson enfermedad; Inhibición recíproca; Reflejo H; Exploración; Hombre</SD>
<LO>INIST-998.354000087566380150</LO>
<ID>00-0238978</ID>
</server>
</inist>
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