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Age-related deficits of manual grasping in a laboratory versus in an everyday-like setting

机译：与年龄相关的实验室中与年龄相关的手动抓握缺陷

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This study compared the grasping performance of 24 younger (20-30 years of age) and 24 older subjects (60-70 years of age) in a typical laboratory task (L) where movements were repetitive, externally triggered, purposeless and attention-attracting, and in an everydaylike task (E) where movements were part of a rich behavioral repertoire, internally initiated, purposive and little attended. We registered a wide range of kinematic and force parameters, and calculated their within-subject means and variation coefficients. Multiple differences emerged between the parameter values in L and E. Factor analysis reduced them to five independent effects. We also found multiple differences between the two age groups, with seniors responding more slowly and in a more stereotyped fashion. Multiple significant task x age interactions emerged as well, with age differences being more pronounced in E than in L. The latter finding is of practical relevance, since it suggests that age-related deficits in some real-life situations may be underestimated in laboratory research. It also is of theoretical relevance: it indicates that brain regions which are particularly vulnerable to aging may contribute to task E more than to task L.
机译：这项研究比较了24位年轻（20-30岁）和24位老年受试者（60-70岁）在典型的实验室任务（L）中的抓地力，在实验室任务中，运动是重复性的，外部触发的，无目的的和引人注意的，并且在日常任务（E）中，动作是丰富的行为习惯的一部分，是内部发起的，有目的性的，很少有人参加。我们记录了范围广泛的运动学和力参数，并计算了它们的对象内平均值和变异系数。 L和E中的参数值之间出现多个差异。因子分析将其减小为五个独立的影响。我们还发现两个年龄段之间存在多种差异，老年人的反应速度较慢，定型方式也有所不同。也出现了多个重要的任务x年龄交互作用，E中的年龄差异比L中的差异更为明显。后一个发现具有实际意义，因为它表明在某些现实生活中与年龄相关的缺陷可能在实验室研究中被低估了。 。这也具有理论意义：表明特别容易老化的大脑区域对任务E的贡献大于对任务L的贡献。

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