Movement Disorders (revue)

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Power-law temporal autocorrelation of activity reflects severity of parkinsonism

Identifieur interne : 001707 ( PascalFrancis/Curation ); précédent : 001706; suivant : 001708

Power-law temporal autocorrelation of activity reflects severity of parkinsonism

Auteurs : WEIDONG PAN [Japon] ; Kyoko Ohashi [Japon, États-Unis] ; Yoshiharu Yamamoto [Japon] ; Shin Kwak [Japon]

Source :

RBID : Pascal:07-0391082

Descripteurs français

English descriptors

Abstract

We aimed to obtain a reliable, objective scale representing disease severity for appropriate management of patients with Parkinson's disease (PD). Nineteen patients with PD at the Department of Neurology, Tokyo University Hospital, were classified into mild (n = 10) or severe groups (n = 9) depending on their Hoehn-Yahr scores, and wore accelerometers on their wrists for more than 6 consecutive days. During this time we monitored their subjective assessments of symptom severity and analyzed the power-law exponents (a) for local maxima and minima of fluctuations in the activity time series. Statistical comparisons were made between the severe and mild groups and of individual patients on "good condition" and "bad condition" days, as well as between days before and after antiparkinsonism medication. In all patients, the a for local maxima was always lower when parkinsonism was mild than when severe. Presence of tremor did not influence the a for local maxima. As the lower a value for local maxima of fluctuations in activity records reflects more frequent switching behavior from low to high physical activities or the severity of akinesia, actigraph monitoring of parkinsonism, and analysis of its power-law correlation may provide useful objective information for controlling parkinsonism in outpatient clinics and for evaluating new antiparkinsonism drugs.
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A11 02  1    @1 OHASHI (Kyoko)
A11 03  1    @1 YAMAMOTO (Yoshiharu)
A11 04  1    @1 KWAK (Shin)
A14 01      @1 Department of Neurology, Graduate School of Medicine, The University of Tokyo @2 Tokyo @3 JPN @Z 1 aut. @Z 4 aut.
A14 02      @1 Educational Physiology Laboratory, Graduate School of Education, The University of Tokyo @2 Tokyo @3 JPN @Z 2 aut. @Z 3 aut.
A14 03      @1 Developmental Biopsychiatry Research Program, McLean Hospital/Harvard Medical School @2 Belmont, Massachusetts @3 USA @Z 2 aut.
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C01 01    ENG  @0 We aimed to obtain a reliable, objective scale representing disease severity for appropriate management of patients with Parkinson's disease (PD). Nineteen patients with PD at the Department of Neurology, Tokyo University Hospital, were classified into mild (n = 10) or severe groups (n = 9) depending on their Hoehn-Yahr scores, and wore accelerometers on their wrists for more than 6 consecutive days. During this time we monitored their subjective assessments of symptom severity and analyzed the power-law exponents (a) for local maxima and minima of fluctuations in the activity time series. Statistical comparisons were made between the severe and mild groups and of individual patients on "good condition" and "bad condition" days, as well as between days before and after antiparkinsonism medication. In all patients, the a for local maxima was always lower when parkinsonism was mild than when severe. Presence of tremor did not influence the a for local maxima. As the lower a value for local maxima of fluctuations in activity records reflects more frequent switching behavior from low to high physical activities or the severity of akinesia, actigraph monitoring of parkinsonism, and analysis of its power-law correlation may provide useful objective information for controlling parkinsonism in outpatient clinics and for evaluating new antiparkinsonism drugs.
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C03 02  X  ENG  @0 Parkinsonism @2 NM @5 02
C03 02  X  SPA  @0 Parkinson síndrome @2 NM @5 02
C03 03  X  FRE  @0 Parkinson maladie @5 03
C03 03  X  ENG  @0 Parkinson disease @5 03
C03 03  X  SPA  @0 Parkinson enfermedad @5 03
C03 04  X  FRE  @0 Akinésie @5 04
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C03 04  X  SPA  @0 Aquinesia @5 04
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C03 05  X  ENG  @0 Autocorrelation @5 09
C03 05  X  SPA  @0 Autocorrelación @5 09
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C07 03  X  FRE  @0 Maladie dégénérative @5 39
C07 03  X  ENG  @0 Degenerative disease @5 39
C07 03  X  SPA  @0 Enfermedad degenerativa @5 39
C07 04  X  FRE  @0 Système nerveux central pathologie @5 40
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 Trouble moteur @5 41
C07 05  X  ENG  @0 Motor system disorder @5 41
C07 05  X  SPA  @0 Trastorno motor @5 41
C07 06  X  FRE  @0 Trouble neurologique @5 42
C07 06  X  ENG  @0 Neurological disorder @5 42
C07 06  X  SPA  @0 Trastorno neurológico @5 42
N21       @1 253
N44 01      @1 OTO
N82       @1 OTO

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Le document en format XML

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<div type="abstract" xml:lang="en">We aimed to obtain a reliable, objective scale representing disease severity for appropriate management of patients with Parkinson's disease (PD). Nineteen patients with PD at the Department of Neurology, Tokyo University Hospital, were classified into mild (n = 10) or severe groups (n = 9) depending on their Hoehn-Yahr scores, and wore accelerometers on their wrists for more than 6 consecutive days. During this time we monitored their subjective assessments of symptom severity and analyzed the power-law exponents (a) for local maxima and minima of fluctuations in the activity time series. Statistical comparisons were made between the severe and mild groups and of individual patients on "good condition" and "bad condition" days, as well as between days before and after antiparkinsonism medication. In all patients, the a for local maxima was always lower when parkinsonism was mild than when severe. Presence of tremor did not influence the a for local maxima. As the lower a value for local maxima of fluctuations in activity records reflects more frequent switching behavior from low to high physical activities or the severity of akinesia, actigraph monitoring of parkinsonism, and analysis of its power-law correlation may provide useful objective information for controlling parkinsonism in outpatient clinics and for evaluating new antiparkinsonism drugs.</div>
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