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Precision in isometric precision grip force is reduced in middle-aged adults

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Abstract

We investigated age related changes in the control of precision grip in 29 healthy adults spanning early adulthood to middle age (21–67 years). Subjects performed a visually guided, isometric precision grip ramp-and-hold force-tracking task. Target force levels were 3, 6, and 9 N. Precision and performance of force regulation was quantified. Larger errors were made during the ramp than during the hold phase. Age correlated positively with the amount of error at the lowest (3 N) force level in both phases. Force onsets were systematically earlier in middle-aged subjects and the average slope of the force during the ramp decreased with increasing age. The results show that precision during low grip force control decreases already during middle age and those subjects may modify their force generation strategies to compensate for early and subtle degenerative changes in the motor system before decline in grip strength is apparent.

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Acknowledgments

This study was in part supported by grants of the City of Paris (Accueil des Chercheurs Etrangers) and of Hjärnfonden (the Swedish Brain Foundation) to PL.

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Authors and Affiliations

  1. Inserm, UMR_S 742, ANiM, 75005, Paris, France

    Påvel Lindberg, Chrystele Ody, Antoine Feydy & Marc A. Maier

  2. UPMC Univ Paris 06, UMR_S 742, ANiM, 75005, Paris, France

    Påvel Lindberg, Chrystele Ody, Antoine Feydy & Marc A. Maier

  3. Université Paris Diderot Paris-7, UMR_S 742, ANiM, 75013, Paris, France

    Marc A. Maier

  4. Service de Radiologie B, APHP, CHU Cochin, Faculté de Médecine, Université Paris Descartes, 27 rue du Faubourg St. Jacques, 75014, Paris, France

    Påvel Lindberg & Antoine Feydy

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  1. Påvel Lindberg
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  2. Chrystele Ody
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Correspondence to Påvel Lindberg.

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Lindberg, P., Ody, C., Feydy, A. et al. Precision in isometric precision grip force is reduced in middle-aged adults. Exp Brain Res 193, 213–224 (2009). https://doi.org/10.1007/s00221-008-1613-4

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