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| Research article summary (published 30 May 2003): |
Objects automatically potentiate action: an fMRI study of implicit processing.
Full Abstract
Behavioural data have shown that the perception of an object automatically potentiates motor components (affordances) of possible actions toward that object, irrespective of the subject's intention. We carried out an event-related fMRI study to investigate the influence of the intrinsic properties of an object on motor responses which were either compatible or incompatible with the action that the object affords. The subjects performed power or precision grip responses based on the categorization of objects into natural or man-made. The objects were either 'small' (usually grasped with a precision grip) or 'large' (usually grasped with a power grip). As expected, the motor responses were fastest to objects that afforded the same grip (congruent) and slowest to objects that afforded the other grip (incongruent). Imaging revealed activations which covaried with compatibility in the parietal, dorsal premotor and inferior frontal cortex. We suggest that the greater the difference in reaction times between congruent and incongruent trials, the greater the competition between the action afforded by the object and the action specified by the task, and thus the greater the activation within this network.
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Author information
Author/s: Grèzes, J (J); Tucker, M (M); Armony, J (J); Ellis, R (R); Passingham, R E (RE);
Affiliation: Wellcome Department of Imaging Neuroscience, University College London, 12 Queen Square, London WC1N 3BG, London, UK. jgrezes(-atsign-)fil.ion.ucl.ac.uk
Journal and publication information
Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't
Journal: The European journal of neuroscience (Eur J Neurosci), published in France. (Language: eng)
Reference: 2003-Jun; vol 17 (issue 12) : pp 2735-40
Dates: Created 2003/06/25; Completed 2003/09/24; Revised 2006/11/15;
PMID: 12823480, 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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