Adamo Diane E, Martin Bernard J, Brown Susan H
University of Michigan, Division of Kinesiology, Ann Arbor, MI 48109-2213, USA.
Percept Mot Skills. 2007 Jun;104(3 Pt 2):1297-309. doi: 10.2466/pms.104.4.1297-1309.
Although upper limb movements are known to be slower and more variable in elderly persons, the extent to which these changes are associated with deficits in movement-related sensory feedback is poorly understood, despite the importance of proprioception in the control of skilled movement. Age-related changes were examined with 22 participants (10 of M age 27 years and 12 of M age 75 years) in performance of an elbow position-matching task which varied in terms of interhemispheric transfer and/or the need to retrieve memory-based proprioceptive information. Matching errors were significantly greater, and movements more prolonged, and irregular in their time course in the elderly group than in the young group. Impaired performance in conditions requiring interhemispheric transfer and retrieval of memory-based proprioceptive information reflected the importance of cognitive processing during complex sensorimotor tasks. This novel matching paradigm provided a sensitive means of manipulating the demands of the task and may be an effective method for as sessing both cognitive and sensorimotor declines associated with aging.
尽管已知老年人的上肢运动更缓慢且变化更大，但尽管本体感觉在熟练运动控制中很重要，这些变化与运动相关感觉反馈缺陷的关联程度却鲜为人知。对22名参与者（10名平均年龄27岁，12名平均年龄75岁）进行了与年龄相关变化的研究，他们执行一项肘部位置匹配任务，该任务在半球间传递和/或检索基于记忆的本体感觉信息方面存在差异。与年轻组相比，老年组的匹配误差显著更大，运动持续时间更长，且时间进程不规则。在需要半球间传递和检索基于记忆的本体感觉信息的条件下表现受损，反映了复杂感觉运动任务中认知处理的重要性。这种新颖的匹配范式提供了一种敏感的方法来操纵任务需求，可能是评估与衰老相关的认知和感觉运动衰退的有效方法。
