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| Research article summary (published 30 Jan 2009): |
Spatial error detection in rapid unimanual and bimanual aiming movements.
Full Abstract
According to closed-loop accounts of motor control, movement errors are detected by comparing sensory feedback to an acquired reference state. Differences between the reference state and the movement-produced feedback results in an error signal which serves as a basis for a correction. The current study assessed whether error detection is less accurate when feedback from both hands must be analyzed compared to one hand and if error detection is more accurate in longer movements compared to shorter movements. 36 college-age participants (26 women and 10 men) performed a rapid aiming movement of varying distances with one hand or both hands simultaneously. Participants verbally estimated the distance moved on all trials before knowledge of results was given. Error detection was measured by the correlation and the mean absolute difference between the actual and estimated distance. Error detection was not more accurate for the longer movements, and participants underestimated errors in all conditions. Strong positive correlations were shown for both unimanual and bimanual aiming tasks, suggesting that two streams of sensory information can be processed concurrently.
Author information
Author/s: Sherwood, David E (DE);
Affiliation: Department of Integrative Physiology, 354 UCB, University of Colorado, Boulder, CO 80309-0354, USA. Sherwood(-atsign-)Colorado.edu
Journal and publication information
Publication Type: Journal Article
Journal: Perceptual and motor skills (Percept Mot Skills), published in United States. (Language: eng)
Reference: 2009-Feb; vol 108 (issue 1) : pp 3-14
Dates: Created 2009/05/11; Completed 2009/06/10;
PMID: 19425441, status: MEDLINE (last retrieval date: 6/10/2009, IMS Date: 10 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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