| Prospective and retrospective effects in human motor control: planning grasps for object rotation and translation. | |
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MedLine Citation:
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PMID: 20941504 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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People pick up objects in ways that reflect prospective as well as retrospective control. Prospective control is indicated by planning for end-state comfort such that people grasp a cylinder to be rotated or translated with a hand orientation or at a height that affords a comfortable final posture. Retrospective control is indicated when people reuse a remembered grasp rather than using a new grasp that would ensure end-state comfort. Here, we asked whether these manifestations of prospective and retrospective control co-occur. We did so by having healthy young-adult participants grasp a cylinder to rotate and translate it between a horizontal position and a vertical position at each of five heights. We found that participants planned for comfortable final hand orientations for first moves but relied on recall for subsequent hand orientations. The results suggest that motor planning is sensitive to computational as well as physical demands and that object rotation and translation are not dissociable features of motor control, at least as reflected in their contributions to grasp selection. The latter result is consistent with the hypothesis that movements constitute holistic body changes between successive goal postures. |
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Authors:
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Rajal G Cohen; David A Rosenbaum |
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Publication Detail:
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Type: Journal Article Date: 2010-10-13 |
Journal Detail:
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Title: Psychological research Volume: 75 ISSN: 1430-2772 ISO Abbreviation: Psychol Res Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0435062 Medline TA: Psychol Res Country: Germany |
Other Details:
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Languages: eng Pagination: 341-9 Citation Subset: IM |
Affiliation:
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Department of Neurology, Oregon Health and Science University, Mail Code NSI, 505 NW 185th Ave., Beaverton, OR, 97006, USA, rajal.cohen@gmail.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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