Movement Disorders (revue)

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A Novel Method for Systematic Analysis of Rigidity in Parkinson's Disease

Identifieur interne : 002005 ( PascalFrancis/Curation ); précédent : 002004; suivant : 002006

A Novel Method for Systematic Analysis of Rigidity in Parkinson's Disease

Auteurs : Takayuki Endo [Japon] ; Ryuhei Okuno [Japon] ; Masaru Yokoe [Japon] ; Kenzo Akazawa [Japon] ; Saburo Sakoda [Japon]

Source :

RBID : Pascal:10-0036264

Descripteurs français

English descriptors

Abstract

We propose a novel system that analyzes the components of rigidity in Parkinson's disease (PD) usually perceived by physicians, in a very simple and systematic way for routine clinical practice. Our system is composed of two compact force sensors, a gyroscope, and EMG surface electrodes. Muscle tone was assessed in 24 healthy elderly subjects and 27 PD patients by passive extension and flexion of the elbow joint with ramp-and-hold trajectory. Torque and angle data in the dynamic phase were used to calculate "elastic coefficients" in extension and flexion, and the mean value of torque in each dynamic phase at each joint angle (defined as "Bias") was also calculated. The muscle activity index in the static phase (EMG Index) was obtained for both biceps brachii (BB) and triceps brachii (TB) muscles. "Elastic coefficients," sum of the "difference of Bias" and "EMG Index" for BB all correlated well with UPDRS score. Based on our results, Parkinsonian rigidity consists of both an "elastic" component and a "difference of Bias" component, and neurologists may assess greater rigidity when either one or both components are high in value. The EMG index was useful for differentiating PD patients with slight rigidity from healthy elderly adults.
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A08 01  1  ENG  @1 A Novel Method for Systematic Analysis of Rigidity in Parkinson's Disease
A11 01  1    @1 ENDO (Takayuki)
A11 02  1    @1 OKUNO (Ryuhei)
A11 03  1    @1 YOKOE (Masaru)
A11 04  1    @1 AKAZAWA (Kenzo)
A11 05  1    @1 SAKODA (Saburo)
A14 01      @1 Department of Neurology, Osaka University Graduate School of Medicine @2 Osaka @3 JPN @Z 1 aut. @Z 3 aut. @Z 5 aut.
A14 02      @1 Department of Electrical and Electronic Engineering, Setsunan University @2 Osaka @3 JPN @Z 2 aut.
A14 03      @1 Department of Biomedical Engineering, Osaka Institute of Technology @2 Osaka @3 JPN @Z 4 aut.
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A60       @1 P
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C01 01    ENG  @0 We propose a novel system that analyzes the components of rigidity in Parkinson's disease (PD) usually perceived by physicians, in a very simple and systematic way for routine clinical practice. Our system is composed of two compact force sensors, a gyroscope, and EMG surface electrodes. Muscle tone was assessed in 24 healthy elderly subjects and 27 PD patients by passive extension and flexion of the elbow joint with ramp-and-hold trajectory. Torque and angle data in the dynamic phase were used to calculate "elastic coefficients" in extension and flexion, and the mean value of torque in each dynamic phase at each joint angle (defined as "Bias") was also calculated. The muscle activity index in the static phase (EMG Index) was obtained for both biceps brachii (BB) and triceps brachii (TB) muscles. "Elastic coefficients," sum of the "difference of Bias" and "EMG Index" for BB all correlated well with UPDRS score. Based on our results, Parkinsonian rigidity consists of both an "elastic" component and a "difference of Bias" component, and neurologists may assess greater rigidity when either one or both components are high in value. The EMG index was useful for differentiating PD patients with slight rigidity from healthy elderly adults.
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C03 01  X  ENG  @0 Parkinson disease @2 NM @5 01
C03 01  X  SPA  @0 Parkinson enfermedad @2 NM @5 01
C03 02  X  FRE  @0 Pathologie du système nerveux @5 02
C03 02  X  ENG  @0 Nervous system diseases @5 02
C03 02  X  SPA  @0 Sistema nervioso patología @5 02
C03 03  X  FRE  @0 Méthode analyse @5 09
C03 03  X  ENG  @0 Analysis method @5 09
C03 03  X  SPA  @0 Método análisis @5 09
C03 04  X  FRE  @0 Electromyographie @5 10
C03 04  X  ENG  @0 Electromyography @5 10
C03 04  X  SPA  @0 Electromiografía @5 10
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C07 01  X  ENG  @0 Cerebral disorder @5 37
C07 01  X  SPA  @0 Encéfalo patología @5 37
C07 02  X  FRE  @0 Syndrome extrapyramidal @5 38
C07 02  X  ENG  @0 Extrapyramidal syndrome @5 38
C07 02  X  SPA  @0 Extrapiramidal síndrome @5 38
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C07 03  X  ENG  @0 Degenerative disease @5 39
C07 03  X  SPA  @0 Enfermedad degenerativa @5 39
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C07 04  X  ENG  @0 Central nervous system disease @5 40
C07 04  X  SPA  @0 Sistema nervosio central patología @5 40
C07 05  X  FRE  @0 Electrophysiologie @5 42
C07 05  X  ENG  @0 Electrophysiology @5 42
C07 05  X  SPA  @0 Electrofisiología @5 42
N21       @1 025
N44 01      @1 OTO
N82       @1 OTO

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Pascal:10-0036264

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