Effects of aging on the control of timing and force in finger tapping movements

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  • 手指のタッピングのタイミングと力の制御に与える加齢の影響
  • テサシ ノ タッピング ノ タイミング ト チカラ ノ セイギョ ニ アタエル カレイ ノ エイキョウ

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The authors examined effects of aging on the control of timing and force in the finger tapping taskfor the 250-ms(250-ms task)or 500-ms(500-ms task)target intertap interval and the 2-N target force. Theanalysis showed that 70s and 80s made both anticipatory and delayed responses for both the 250-ms and 500-ms tasks. There were also significant differences among age groups for intertap interval variability, showing that both 70s and 80s were more variable for the interval than 20s. The self-paced(recall)task was further more variable for the interval of the 250-ms task than the stimulus-initiated(practice)task. The anticipatory response and variable interval in the elders appear similar to those which are typically observed in patients with Parkinson's disease and may be associated with a dysfunction of the basal ganglia. On the other hand, whereas 20s and 60s slightly undershot the force target,70s and 80s overshot the target, indicating that it is difficult for the elders to finely control their force to the target force.

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