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Speech Motor ControlNew developments in basic and applied research$
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Ben Maassen and Pascal van Lieshout

Print publication date: 2010

Print ISBN-13: 9780199235797

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780199235797.001.0001

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Apraxia of speech: what the deconstruction of phonetic plans tells us about the construction of articulate language

Apraxia of speech: what the deconstruction of phonetic plans tells us about the construction of articulate language

Chapter:
(p.3) Chapter 1 Apraxia of speech: what the deconstruction of phonetic plans tells us about the construction of articulate language
Source:
Speech Motor Control
Author(s):

Wolfram Ziegler

Anja Staiger

Ingrid Aichert

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199235797.003.0001

Apraxia of speech is considered as a speech motor planning impairment. Apraxic speech errors may therefore inform us about the structure of phonetic plans. Recent studies have suggested that syllabic motor integration mechanisms play a role in apraxic error generation, which contradicts earlier views of a segment-by-segment planning process. However, learning experiments in apraxic speakers have revealed that syllables should not be viewed as indivisible motor primitives. Moreover, supra-syllabic (metrical) mechanisms can also be shown to play an important role in the genesis of apraxic errors. This chapter proposes a non-linear architecture of phonetic representations which embraces gestural, syllabic, and metrical tiers.

Keywords:   apraxic speech errors, motor planning speech impairment, phonetic plans, phonetic representation

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