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The Roots of Cognitive NeuroscienceBehavioral Neurology and Neuropsychology$
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Anjan Chatterjee and H. Branch Coslett

Print publication date: 2013

Print ISBN-13: 9780195395549

Published to Oxford Scholarship Online: January 2014

DOI: 10.1093/acprof:oso/9780195395549.001.0001

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Alexias and Agraphias

Alexias and Agraphias

(p.89) Chapter 5 Alexias and Agraphias
The Roots of Cognitive Neuroscience

David P. Roeltgen

Elizabeth H. Lacey

Oxford University Press

Historically, alexia and agraphia have primarily been discussed in the context of each other; pure alexia, pure agraphia and alexia with agraphia. Studies in the late twentieth and early twenty-first centuries have addressed mechanisms within the systems of reading and writing (or oral spelling) that produce varying types of alexias and agraphias. Alexias and agraphias can be divided into peripheral and central types. Peripheral disorders of reading involve impairment of vision and perception while peripheral disorders of writing involve praxis and motor function. Central disorders of reading and writing involve phonology and semantics. From analysis of patients with alexia and agraphia researchers have developed models to help explain reading and writing and their disorders. This chapter describes representative models.

Keywords:   reading, writing, alexia, agraphia, dual-route model, phonology, semantics

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