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| Research article summary (published 30 Dec 2002): |
Are fingers special? Evidence about movement preparation from event-related brain potentials.
Full Abstract
Ulrich, Leuthold, and Sommer (1998) suggested that movement preparation at the level of the motor cortex, as indexed by the lateralized readiness potential (LRP), proceeds in a strongly hierarchical fashion, where parameters other than response hand are prepared only if all the movement parameters are known. These conclusions were based on an experiment where a precue provided information about response hand, direction of finger movement, and movement force. To assess the generality of these findings, we replaced the force parameter with response finger. LRP indicated that preparation of the required finger is possible even when preliminary information is incomplete. Therefore, movement preparation appears to follow different rules when anatomical relationships (hand and finger) are concerned as compared to functional parameters like movement direction. On the other hand, at a limb-unspecific level, as indicated by the contingent negative variation, we confirmed evidence for parallel programming of all movement parameters.
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Author information
Author/s: Wild-Wall, Nele (N); Sangals, Jörg (J); Sommer, Werner (W); Leuthold, Hartmut (H);
Affiliation: Department of Biological Psychology, Humboldt University at Berlin, Germany. nele.wild-wall(-atsign-)rz.hu-berlin.de
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't
Journal: Psychophysiology (Psychophysiology), published in United States. (Language: eng)
Reference: 2003-Jan; vol 40 (issue 1) : pp 7-16
Dates: Created 2003/05/19; Completed 2003/06/23; Revised 2006/11/15;
PMID: 12751800, 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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