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| Research article summary (published 29 Nov 2002): |
On the role of visual afferent information for the control of aiming movements toward targets of different sizes.
Full Abstract
The authors investigated (a). whether the specificity of practice hypothesis is mediated by the importance of visual afferent information for the control of manual aiming movements and (b). how movement planning and online correction processes to the movement initial impulse are affected by the withdrawal of visual information in transfer. In acquisition, participants (N = 40) aimed at targets of different sizes in a full-vision or in a target-only condition before being transferred to a target-only condition without knowledge of results. The results supported the hypothesis that learning is specific to the source or sources of afferent information that are more likely to ensure optimal performance. The results also suggested that individuals will not always use visual afferent information more extensively when aiming at a small rather than at a large target. Instead, in a temporally constrained task, the relative efficiency of visually based corrections appears to mediate how exclusively an individual will rely on online visual afferent information for movement control. Finally, the detailed kinematic analysis performed in the present study clearly indicated that online modifications to the movement primary impulse are possible, arguing for a continuous or pseudo-continuous control of relatively slow aiming movements on the basis of visual afferent input.
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Author information
Author/s: Proteau, Luc (L); Isabelle, Geneviève (G);
Affiliation: Département de kinésiologie, Université de Montréal, P O Box 6128, Station "Downtown," Montréal H3C 3J7, Canada. luc.proteau(-atsign-)umontreal.ca
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: 2002-Dec; vol 34 (issue 4) : pp 367-84
Dates: Created 2002/11/26; Completed 2003/03/21; Revised 2006/11/15;
PMID: 12446251, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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