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| Research article summary (published 18 Feb 2003): |
A supramodal number representation in human intraparietal cortex.
Full Abstract
The triple-code theory of numerical processing postulates an abstract-semantic "number sense." Neuropsychology points to intraparietal cortex as a potential substrate, but previous functional neuroimaging studies did not dissociate the representation of numerical magnitude from task-driven effects on intraparietal activation. In an event-related fMRI study, we presented numbers, letters, and colors in the visual and auditory modality, asking subjects to respond to target items within each category. In the absence of explicit magnitude processing, numbers compared with letters and colors across modalities activated a bilateral region in the horizontal intraparietal sulcus. This stimulus-driven number-specific intraparietal response supports the idea of a supramodal number representation that is automatically accessed by presentation of numbers and may code magnitude information.
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Author information
Author/s: Eger, Evelyn (E); Sterzer, Philipp (P); Russ, Michael O (MO); Giraud, Anne-Lise (AL); Kleinschmidt, Andreas (A);
Affiliation: Cognitive Neurology Unit, Department of Neurology, Johann-Wolfgang-Goethe University, Frankfurt a.M., Germany. eger@em.uni-frankfurt.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Neuron (Neuron), published in United States. (Language: eng)
Reference: 2003-Feb; vol 37 (issue 4) : pp 719-25
Dates: Created 2003/02/24; Completed 2003/03/07; Revised 2006/11/15;
PMID: 12597867, 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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