NDLI: Effect of Word and Syllable Frequency on Activation During Lexical Decision and Reading Aloud

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Effect of Word and Syllable Frequency on Activation During Lexical Decision and Reading Aloud

Content Provider	PubMed Central
Author	Carreiras, Manuel Andrea, Mechelli Price, Cathy J.
Copyright Year	2006
Abstract	This functional MRI (fMRI) study investigated the effect of lexical and syllable frequency on visual word processing during lexical decision and reading aloud. Previous research has shown a dissociation of syllable and word frequency effects in Spanish using behavioral and electrophysiological measures, suggesting that sublexical (syllabic) representations are computed and mediate the firing of lexical candidates. Here, we characterize the neuroanatomical basis of these lexical and sublexical manipulations and their dependence on task. During lexical decision, words with low vs. high lexical frequency increased activation in left frontal, anterior cingulate, supplemental motor area (SMA), and pre-SMA regions; while words with high vs. low syllable frequency increased activation in a left anterior inferior temporal region. In contrast, when the words were read aloud those with low vs. high syllable frequency increased activation in the left anterior insula, with no other significant effects. On the basis of the neuroanatomy, we propose that the contrasting effects of syllable frequency during lexical decision and reading aloud reflect two different cognitive processes in visual word processing. Specifically, words with high-frequency syllables may increase lexical competition in the inferior temporal lobe while facilitating articulatory planning in the left anterior insula. Hum Brain Mapp, 2006. © 2006 Wiley-Liss, Inc.
Related Links	http://dx.doi.org/10.1002/hbm.20236
Ending Page	972
Page Count	10
Starting Page	963
File Format	PDF
ISSN	10659471
e-ISSN	10970193
Journal	Human Brain Mapping
Issue Number	12
Volume Number	27
Language	English
Publisher	Wiley Subscription Services, Inc., A Wiley Company
Publisher Date	2006-12-01
Access Restriction	Open
Rights Holder	Wiley Subscription Services, Inc., A Wiley Company
Subject Keyword	Anatomy Radiological and Ultrasound Technology Radiology Nuclear Medicine and imaging Neurology Clinical Neurology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Anatomy Neurology Radiology, Nuclear Medicine and Imaging Neurology (clinical) Radiological and Ultrasound Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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