| Pointing control using a moving base of support. | |
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MedLine Citation:
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PMID: 19544057 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purposes of this study were to determine whether gaze direction provides a control signal for movement direction for a pointing task requiring a step and to gain insight into why discrepancies previously identified in the literature for endpoint accuracy with gaze directed eccentrically exist. Straight arm pointing movements were performed to real and remembered target locations, either toward or 30 degrees eccentric to gaze direction. Pointing occurred in normal room lighting or darkness while subjects sat, stood still or side-stepped left or right. Trunk rotation contributed 22-65% to gaze orientations when it was not constrained. Error differences for different target locations explained discrepancies among previous experiments. Variable pointing errors were influenced by gaze direction, while mean systematic pointing errors and trunk orientations were influenced by step direction. These data support the use of a control strategy that relies on gaze direction and equilibrium inputs for whole-body goal-directed movements. |
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Authors:
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Jan M Hondzinski; Taegyong Kwon |
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Publication Detail:
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Type: Journal Article Date: 2009-06-21 |
Journal Detail:
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Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 197 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-07-10 Completed Date: 2009-09-29 Revised Date: 2009-11-11 |
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: 81-90 Citation Subset: IM |
Affiliation:
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Department of Kinesiology, Louisiana State University, 112 Long Fieldhouse, Baton Rouge, LA 70803, USA. jhondz1@lsu.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention / physiology* Biomechanics / physiology Female Fixation, Ocular / physiology* Functional Laterality / physiology Humans Male Motion Perception / physiology* Movement / physiology* Orientation Photic Stimulation / methods Posture / physiology Reference Values Visual Fields / physiology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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