Vowel Production in Childhood and Acquired Apraxia of Speech

Authored by: Adam Jacks , Thomas P. Marquardt , Barbara L. Davis

Handbook of Vowels and Vowel Disorders

Print publication date:  September  2012
Online publication date:  May  2013

Print ISBN: 9781848726123
eBook ISBN: 9780203103890
Adobe ISBN: 9781136246852


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Apraxia of speech (AOS) and childhood apraxia of speech (CAS) are acquired and congenital forms of a neuromotor disorder characterized by deficits in the planning and execution of sequential speech movements in the absence of neuromuscular pathology (McNeil, Robin, & Schmidt, 2009). The childhood and adult forms of the disorder are not directly comparable because of differences in onset and etiology. However, they have been linked because of their speech deficit similarities (Wambaugh, Duffy, McNeil, Robin, & Rogers, 2006; American Speech-Language-Hearing Association, 2007; Shuster & Wambaugh, 2008), and a presumed similarity in impaired neural mechanisms (Jacks & Robin, 2010).

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