Persistent Link:
http://hdl.handle.net/10150/195488
Title:
Exploring a Common Neural Substrate of Reading and Spelling
Author:
Cho, Hyesuk
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Whether reading and spelling rely on the same orthographic representations has been a controversial issue in the neuropsychology literature. In general, associations between patterns of alexia and agraphia in neurological patients have been interpreted to support the view that reading and spelling share the same orthographic lexicon. By contrast, dissociations between reading and spelling profiles are considered as evidence for the existence of separate orthographic input and output lexicons subserving written word recognition and production. Neuroimaging research relevant to the neural substrates of orthographic processing has shown consistent association between reading and activation in the mid-lateral portions of the left fusiform gyrus (BA 37), a region that has come to be known as the "visual word form area" (VWFA). Critically, it has been shown that spelling words also activates the VWFA. These findings seem to confirm the central role of the VWFA in orthographic processing and support the view that the same orthographic representations mediate reading and spelling. Unfortunately, the available neuroimaging evidence on the relationship between reading and spelling is limited in that the relevant studies typically have involved different subject groups. The purpose of this study was to investigate whether the cortical region responsible for orthographic processing during reading is also activated during spelling in the same individuals using fMRI (functional magnetic resonance imaging). Fifteen native English speakers participated in the study and were administered reading and writing tasks designed to isolate cortical regions involved in orthographic processing during reading and writing. Results showed that the left mid fusiform gyrus corresponding to the VWFA is associated not only with orthographic processing in reading but is also recruited during the retrieval of orthographic information in spelling, suggesting that this cortical region is the common neural substrate of orthographic processing for both written language tasks. These findings are consistent with shared components cognitive models that postulate a single orthographic lexicon mediating both reading and spelling.
Type:
text; Electronic Dissertation
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Speech, Language, & Hearing Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Beeson, Pelagie M.
Committee Chair:
Beeson, Pelagie M.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleExploring a Common Neural Substrate of Reading and Spellingen_US
dc.creatorCho, Hyesuken_US
dc.contributor.authorCho, Hyesuken_US
dc.date.issued2010en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractWhether reading and spelling rely on the same orthographic representations has been a controversial issue in the neuropsychology literature. In general, associations between patterns of alexia and agraphia in neurological patients have been interpreted to support the view that reading and spelling share the same orthographic lexicon. By contrast, dissociations between reading and spelling profiles are considered as evidence for the existence of separate orthographic input and output lexicons subserving written word recognition and production. Neuroimaging research relevant to the neural substrates of orthographic processing has shown consistent association between reading and activation in the mid-lateral portions of the left fusiform gyrus (BA 37), a region that has come to be known as the "visual word form area" (VWFA). Critically, it has been shown that spelling words also activates the VWFA. These findings seem to confirm the central role of the VWFA in orthographic processing and support the view that the same orthographic representations mediate reading and spelling. Unfortunately, the available neuroimaging evidence on the relationship between reading and spelling is limited in that the relevant studies typically have involved different subject groups. The purpose of this study was to investigate whether the cortical region responsible for orthographic processing during reading is also activated during spelling in the same individuals using fMRI (functional magnetic resonance imaging). Fifteen native English speakers participated in the study and were administered reading and writing tasks designed to isolate cortical regions involved in orthographic processing during reading and writing. Results showed that the left mid fusiform gyrus corresponding to the VWFA is associated not only with orthographic processing in reading but is also recruited during the retrieval of orthographic information in spelling, suggesting that this cortical region is the common neural substrate of orthographic processing for both written language tasks. These findings are consistent with shared components cognitive models that postulate a single orthographic lexicon mediating both reading and spelling.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineSpeech, Language, & Hearing Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorBeeson, Pelagie M.en_US
dc.contributor.chairBeeson, Pelagie M.en_US
dc.contributor.committeememberDeDe, Gayleen_US
dc.contributor.committeememberPlante, Elenaen_US
dc.contributor.committeememberRapcsak, Steven Z.en_US
dc.identifier.proquest11171en_US
dc.identifier.oclc752261025en_US
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