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Neuromotor Mechanisms in Human Communication$
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Doreen Kimura

Print publication date: 1993

Print ISBN-13: 9780195054927

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780195054927.001.0001

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Cortical systems in speaking

Cortical systems in speaking

(p.42) 4. Cortical systems in speaking
Neuromotor Mechanisms in Human Communication

Doreen Kimura

Oxford University Press

This chapter examines aphasic patients who have experienced damage to either the anterior or posterior speech zones. The results of various speech comprehension and perception tasks undertaken by these patients did not differ significantly, nor were the results of measures of speech fluency or speech-repetition very different. Aphasic patients with anterior lesions had reduced fluency and showed impairment in repeating back isolated speech sounds or syllables, though multisyllabic speech could be repeated relatively well. In contrast, aphasic patients with posterior lesions had fluent speech and tended to have little difficulty with repetition of isolated syllables. It appears that anterior and posterior speech systems represent two levels of speech control, unisyllabic and multisyllabic, respectively. Within the multisyllabic level, however, there are differences between the temporal and parietal regions, the former contributing a verbal echolalic component.

Keywords:   aphasic patients, anterior speech zone, posterior speech zone, speech comprehension, perception, fluency, speech repetition, speech control

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