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| Research article summary (published 30 Jul 2002): |
Modality independence of word comprehension.
Full Abstract
Functional magnetic resonance imaging (fMRI) was used to examine the functional anatomy of word comprehension in the auditory and visual modalities of presentation. We asked our subjects to determine if word pairs were semantically associated (e.g., table, chair) and compared this to a reference task where they were asked to judge whether word pairs rhymed (e.g., bank, tank). This comparison showed task-specific and modality-independent activation for semantic processing in the heteromodal cortices of the left inferior frontal gyrus (BA 46, 47) and left middle temporal gyrus (BA 21). There were also modality-specific activations in the fusiform gyrus (BA 37) for written words and in the superior temporal gyrus (BA 22) for spoken words. Our findings are consistent with the hypothesis that word form recognition (lexical encoding) occurs in unimodal cortices and that heteromodal brain regions in the anterior as well as posterior components of the language network subserve word comprehension (semantic decoding). Copyright 2002 Wiley-Liss, Inc.
Author information
Author/s: Booth, James R (JR); Burman, Douglas D (DD); Meyer, Joel R (JR); Gitelman, Darren R (DR); Parrish, Todd B (TB); Mesulam, M Marsel (MM);
Affiliation: Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois 60208-3560, USA. j-booth(-atsign-)nwu.edu
Grants: R01 HD042049-02 (Agency:NICHD NIH HHS) ; R21 DC006149-02 (Agency:NIDCD NIH HHS)
Journal and publication information
Publication Type: Journal Article
Journal: Human brain mapping (Hum Brain Mapp), published in United States. (Language: eng)
Reference: 2002-Aug; vol 16 (issue 4) : pp 251-61
Dates: Created 2002/07/11; Completed 2002/09/13; Revised 2007/11/14;
PMID: 12112766, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: 18 Feb 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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