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| Research article summary (published 29 Sep 2002): |
Functional imaging of the mechanisms underlying the bilateral field advantage.
Full Abstract
Visual stimulus comparisons across the vertical meridian are faster and more accurate than those restricted to a single hemifield (the bilateral field advantage). We set out to investigate the cerebral mechanisms underlying this effect using functional magnetic resonance imaging. Seven normal volunteers were presented pairs of shape stimuli bilaterally across the vertical meridian and unilaterally within a single hemifield. We found a network of additional areas activated in the unilateral condition over the bilateral condition which have been related to working memory in previous studies. The results suggest different processing strategies with different temporal characteristics in the bilateral and unilateral conditions, providing a novel explanation for the bilateral field advantage.
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Author information
Author/s: Santhouse, A M (AM); Ffytche, D H (DH); Howard, R J (RJ); Williams, S C R (SC); Rifkin, L (L); Murray, R M (RM);
Affiliation: Institute of Psychiatry, De Crespigny Park, London SE5 8AF, United Kingdom. a.santhouse(-atsign-)iop.kcl.ac.uk
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't
Journal: NeuroImage (Neuroimage), published in United States. (Language: eng)
Reference: 2002-Oct; vol 17 (issue 2) : pp 680-7
Dates: Created 2002/10/14; Completed 2002/11/25; Revised 2006/11/15;
PMID: 12377143, 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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