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• W3093786503 abstract "ABSTRACT Dexterous manipulation may be guided by explicit information about object property. Such a manipulation requires fine modulation of digit position and forces using explicit cues. Young adults can form arbitrary cue-object property associations for accurate modulation of digit position and forces. Aging, in contrast, might alter this conditional learning. Older adults are impaired in accurately modulating their digit forces using explicit cues about object property. However, it is not known whether older adults can use explicit cues about object property to modulate digit position. In this study, we instructed ten healthy older and ten young adults to learn a manipulation task using arbitrary color cues about object center of mass location. Subjects were required to exert clockwise, counterclockwise, or no torque on the object according to the color cue and lift the object while minimizing its tilt across sixty trials. Older adults produced larger torque error during the conditional learning trials than young adults. This resulted in a significantly slower rate of learning in older adults. Older, but not young adults, failed to modulate their digit position and forces using the color cues. Similar aging-related differences were not observed while learning the task using implicit knowledge about object property. Our findings suggest that aging impairs the ability to use explicit cues about object property to modulate both digit position and forces for dexterous manipulation. We discuss our findings in relation to age-related changes in the processes and the neural network for conditional learning." @default.
• W3093786503 created "2020-10-29" @default.
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• W3093786503 date "2020-10-21" @default.
• W3093786503 modified "2023-10-14" @default.
• W3093786503 title "Modulation of Grasp Parameters using Arbitrary Cues about Object Property in Older Adults" @default.
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• W3093786503 doi "https://doi.org/10.1101/2020.10.19.344457" @default.
• W3093786503 hasPublicationYear "2020" @default.
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