Speech-muscle visuomotor tracking in dysarthric and nonimpaired speakers

M. D. McClean, D. R. Beukelman, K. M. Yorkston

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Assessment of speech-muscle function during nonspeech tasks may provide an important component in the clinical evaluation of speech-motor disorders. Various methodological problems have limited the value of such data in the past. The goal of the present study was to evaluate a set of instrumental, objective procedures for assessment of the nonspeech performance capabilities of different speech-muscle systems. Subjects included 10 nonimpaired adults and a diverse group of 6 adult dysarthric individuals. Each subject performed visuomotor tracking of a 0.6-Hz sinusoidal target with the lower lip, jaw, larynx, and respiratory systems. Cross correlation and phase data were used to describe tracking performance. The nonimpaired subjects showed consistently high cross correlations with little phase shift. The dysarthric subjects showed a wide range of tracking performance which was generally consistent with their overall levels of speech performance and levels of neurological impairment. Differential levels of performance were noted across speech subsystems in some dysarthric subjects. In general, the results suggest that visuomotor-tracking paradigms provide a viable approach to clinical evaluation of speech-muscle function in nonspeech tasks.

Original languageEnglish (US)
Pages (from-to)276-282
Number of pages7
JournalJournal of Speech and Hearing Research
Issue number2
StatePublished - 1987

ASJC Scopus subject areas

  • Otorhinolaryngology


Dive into the research topics of 'Speech-muscle visuomotor tracking in dysarthric and nonimpaired speakers'. Together they form a unique fingerprint.

Cite this