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Semin Speech Lang 2002; 23(4): 231-244
DOI: 10.1055/s-2002-35798
Copyright © 2002 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA. Tel.: +1(212) 584-4662

Psycholinguistic and Motor Theories of Apraxia of Speech

Wolfram Ziegler
  • EKN-Clinical Neuropsychology Research Group, Department of Neuropsychology, City Hospital Bogenhausen, Munich, Germany
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Publication History

Publication Date:
03 December 2002 (online)

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ABSTRACT

This article sketches the relationships between modern conceptions of apraxia of speech (AOS) and current models of neuromotor and neurolinguistic disorders. The first section is devoted to neurophysiological perspectives of AOS, and its relation to dysarthrias and to limb apraxia is discussed. The second section introduces the logogen model and considers AOS in relation to supramodal aspects of aphasia. In the third section, AOS with the background of psycholinguistic models of spoken language production, including the Levelt model and connectionist models, is discussed. In the fourth section, the view of AOS as a disorder of speech motor programming is discussed against the background of theories from experimental psychology. The final section considers two models of speech motor control and their relation to AOS. The article discusses the strengths and weaknesses of these approaches.

KEYWORDS

Apraxia of speech - motor control - speech production models

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1 *Chinese prereading children may speak normally but score near random on rime-, onset-, or coda-matching tasks.[32] Illiterate adults may have problems on explicit phonological segmentation or pseudoword repetiton tasks, although they have normal speech.[33]

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