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Decline in motor prediction in elderly subjects: right versus left arm differences in mentally simulated motor actions.

This study investigates the effects of age upon the temporal features of executed and imagined movements performed with the dominant (D; right) and nondominant (ND; left) arms. Thirty right-handed subjects were divided into two groups: (i) the young group (n=15; mean age: 22.5+/-2.5 years) and (ii)...

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Publicado en:Cortex: A Journal Devoted to the Study of the Nervous System & Behavior Vol. 44; no. 9; pp. 1271 - 1279
Autores principales: Skoura X, Personnier P, Vinter A, Pozzo T, Papaxanthis C
Formato: research tables/charts Journal Article
Publicado: Masson SPA Oct2008
Acceso en línea:Ver este registro en EBSCOhost
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      jtl: Cortex: A Journal Devoted to the Study of the Nervous System & Behavior
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      dt: Oct2008
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      pub: Masson SPA
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        atl: Decline in motor prediction in elderly subjects: right versus left arm differences in mentally simulated motor actions.
      aug:
        au:
          Skoura X
          Personnier P
          Vinter A
          Pozzo T
          Papaxanthis C
        affil: Laboratoire d'Etude de l'apprentissage et du développement (LEAD), CNRS, UMR 5022, Université de Bourgogne, Dijon, France.
      sug:
        subj:
          Arm Physiopathology
          Motor Activity
          Adult
          Cerebral Cortex
          Data Collection
          Descriptive Statistics
          Female
          Funding Source
          Male
          Right-Handedness
          Volunteer Workers
          Human
          Adult: 19-44 years
          Female
          Male
      ab: This study investigates the effects of age upon the temporal features of executed and imagined movements performed with the dominant (D; right) and nondominant (ND; left) arms. Thirty right-handed subjects were divided into two groups: (i) the young group (n=15; mean age: 22.5+/-2.5 years) and (ii) the elderly group (n=15; mean age: 70.2+/-2.2 years). The motor task, involving arm pointing movements among four pairs of targets (.5cm, 1cm, 1.5cm and 2cm), imposed strong spatiotemporal constraints. During overt performance, young and elderly subjects modulated movement duration according to the size of targets, despite the fact that movement speed decreased with age as well as in the left arm compared with the right. This observation was also valid for the covert performance produced by the young group. However, such a strong relationship between covert movement durations and target size was not as obvious in the elderly group. Young, compared to elderly subjects, showed stronger correlations and smaller absolute differences between executed and imagined movements for both arms. Additionally, the absolute difference between executed and imagined arm movement durations was more pronounced for the left than the right arm in aged subjects. This result suggests a selective decline with age of mental prediction of motor actions, which is more prominent when the ND arm is involved.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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