Internal model recalibration does not deteriorate with age while motor adaptation does

NEUROBIOLOGY OF AGING

卷:80

Article

Vandevoorde, Koenraad¹  de Xivry, Jean-Jacques Orban² 

[1] Katholieke Univ Leuven, Dept Movement Sci, Movement Control & Neuroplastic Res Grp, Tervuursevest 101 Bus 1501, B-3001 Leuven, Belgium

[2] Katholieke Univ Leuven, LBI, Leuven, Belgium

关键词: Aging;    Motor learning;    Motor adaptation;    Internal model;    Cerebellum;   

DOI  :  10.1016/j.neurobiolaging.2019.03.020

来源: Elsevier

【 摘 要 】

A wide range of motor function declines with aging. Motor adaptation, which occurs when participants learn to reach accurately to a target despite a perturbation, does not deviate from this rule. There are currently 3 major hypotheses that have been put forward to explain this age-related decline in adaptation: deterioration of internal model recalibration due to age-related cerebellar degeneration, impairment of the cognitive component of motor adaptation, and deficit in the retention of the learned movement. In the present study, we systematically investigated these 3 hypotheses in a large sample of older women and men. We demonstrate that age-related deficits in motor adaptation are not due to impaired internal model recalibration or impaired retention of motor memory. Rather, we found that the cognitive component was reduced in older people. Therefore, our study suggests the interesting possibility that cerebellar-based mechanisms do not deteriorate with age despite cerebellar degeneration. In contrast, internal model recalibration appears to compensate for deficits in the cognitive component of this type of learning. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

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