| Posture of the arm when grasping spheres to place them elsewhere. | |
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MedLine Citation:
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PMID: 20567809 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Despite the infinitely many ways to grasp a spherical object, regularities have been observed in the posture of the arm and the grasp orientation. In the present study, we set out to determine the factors that predict the grasp orientation and the final joint angles of reach-to-grasp movements. Subjects made reach-to-grasp movements toward a sphere to pick it up and place it at an indicated location. We varied the position of the sphere and the starting and placing positions. Multiple regression analysis showed that the sphere's azimuth from the subject was the best predictor of grasp orientation, although there were also smaller but reliable contributions of distance, starting position, and perhaps even placing position. The sphere's initial distance from the subject was the best predictor of the final elbow angle and shoulder elevation. A combination of the sphere's azimuth and distance from the subject was required to predict shoulder angle, trunk-head rotation, and lateral head position. The starting position best predicted the final wrist angle and sagittal head position. We conclude that the final posture of the arm when grasping a sphere to place it elsewhere is determined to a larger extend by the initial position of the object than by effects of starting and placing position. |
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Authors:
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Willemijn D Schot; Eli Brenner; Jeroen B J Smeets |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-22 |
Journal Detail:
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Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 204 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-06-25 Completed Date: 2010-09-23 Revised Date: 2010-09-30 |
Medline Journal Info:
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Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
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Languages: eng Pagination: 163-71 Citation Subset: IM |
Affiliation:
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Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands. w.schot@fbw.vu.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arm* / physiology Hand* / physiology Hand Strength* / physiology Humans Movement / physiology Orientation / physiology Posture* / physiology Psychomotor Performance / physiology Regression Analysis Space Perception / physiology |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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