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| Research article summary (published 13 Jun 2002): |
Orienting visuospatial attention generates manual reaction time asymmetries in target detection and pointing.
Full Abstract
Right-handers exhibit a left hand advantage in response preparation when pointing to targets. These manual asymmetries are generally attributed to a right hemisphere specialization for spatial processing. More precisely, the left hand reaction time (RT) advantage was recently supposed to reflect specifically the right hemisphere superiority for movement planning. This study proposes to investigate a possible attentional origin for manual RT asymmetries. In a first experiment, we used the covert orienting of attention paradigm to measure subjects' RTs when reaching at targets (pointing task) both in valid, neutral and invalid conditions, either in the left or in the right visual fields and with the left and the right hand. In a second experiment, we applied the same paradigm to a detection task (key-pressing). Results revealed that orienting of attention to spatial locations was more time consuming when responding with the right than with the left hand, whether movement planning was required or not. It is suggested that the right hemisphere dominance for orienting of visuospatial attention account, partly at least, for the RT asymmetries classically observed in manual aiming.
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Author information
Author/s: Barthélémy, Sebastien (S); Boulinguez, Philippe (P);
Affiliation: Laboratoire d'Analyse de la Performance Motrice Humaine, MSHS, 99 avenue du Recteur Pineau, BP 632, 86022, EA 2253, Poitiers cedex, France.
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial
Journal: Behavioural brain research (Behav Brain Res), published in Netherlands. (Language: eng)
Reference: 2002-Jun; vol 133 (issue 1) : pp 109-16
Dates: Created 2002/06/05; Completed 2002/08/12; Revised 2006/11/15;
PMID: 12048178, 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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