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date: 20 October 2020

Abstract and Keywords

This chapter reviews speech motor impairments resulting from neurologic disorders, that is, dysarthria and apraxia of speech. The architecture of the brain’s speech motor network is used as a framework to describe the symptom patterns of the most relevant syndromes and their underlying pathomechanisms, with a focus on some of the more controversial issues. The chapter’s final section discusses whether speech motor impairments should be understood as domain-general dysfunctions of respiratory, laryngeal, and vocal tract movements, or as disorders of a motor system specialized for vocal communication.

Keywords: motor speech, dysarthria, apraxia of speech, phonological impairment, motor cortex, basal ganglia, cerebellum, left inferior frontal cortex, dorsal stream

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