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| Research article summary (published 29 Apr 2009): |
Corrective processes in grasping after perturbations of object size.
Full Abstract
Researchers proposed that humans may achieve grip adaptation to a new object size by reprogramming and substituting the initially planned motor program. The authors investigated corrective processes in grasping by using a size perturbation paradigm. In 3 experiments, they investigated how grip adjustments are influenced by different perturbation times (early or late), the visibility of the moving hand, and different perturbation sizes (small or large). Results indicated that individuals execute corrections faster after late perturbations. The availability of visual information about the hand had minimal effect on the corrections, suggesting that feedforward mechanisms are involved. Moreover, participants achieved adjustments mainly by smooth changes of the aperture over time, contradicting the researchers' assumption that a new movement is programmed and superimposed.
Author information
Author/s: Hesse, Constanze (C); Franz, Volker H (VH);
Affiliation: Department of Experimental Psychology, Justus-Liebig-Universität, Giessen, Germany. constanze.hesse(-atsign-)psy.lmu.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Journal of motor behavior (J Mot Behav), published in United States. (Language: eng)
Reference: 2009-May; vol 41 (issue 3) : pp 253-73
Dates: Created 2009/04/15; Completed 2009/06/25;
PMID: 19366658, status: MEDLINE (last retrieval date: 6/25/2009, IMS Date: 25 Jun 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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