Journal
BRAIN AND LANGUAGE
Volume 80, Issue 3, Pages 556-575Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/brln.2001.2614
Keywords
dysarthria; apraxia; speech; diadochokinesis; articulation; syllable; ataxia
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This study was focused on the potential influence of task-related factors on oral motor performance in patients with speech disorders. Sentence production was compared with a nonspeech oral motor task, i.e., oral diadochokinesis. Perceptual and acoustic measures of speech impairment were used as dependent variables. Between-task comparisons were made for subsamples of a population of 140 patients with different motor speech syndromes, including apraxia of speech and cerebellar dysarthria. In a further analysis subgroups were matched for speaking rate. Overall, dysdiadochokinesis was correlated with the degree of speech impairment, but there was a strong interaction between task type and motor speech syndrome. In particular, cerebellar pathology affected DDK to a relatively greater extent than sentence production, while apraxic pathology spared the ability of repeating syllables at maximum speed. (C) 2002 Elsevier Science (USA).
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