Lip Movement in Apraxia of Speech Peak articulatory velocity of the lower lip and temporal coordination between the upper and lower lips were studied in 5 neurologically impaired subjects with speech behaviors consistent with a diagnosis of apraxia of speech. Differences in velocity and the timing between the movement onset of the two lips were compared ... Research Article
Research Article  |   September 01, 1989
Lip Movement in Apraxia of Speech
 
Author Affiliations & Notes
  • Donald A. Robin
    The University of Iowa
  • Carolyn Bean
    The University of Iowa
  • John W. Folkins
    The University of Iowa
Article Information
Research Articles
Research Article   |   September 01, 1989
Lip Movement in Apraxia of Speech
Journal of Speech, Language, and Hearing Research, September 1989, Vol. 32, 512-523. doi:10.1044/jshr.3203.512
History: Received April 27, 1988 , Accepted December 13, 1988
 
Journal of Speech, Language, and Hearing Research, September 1989, Vol. 32, 512-523. doi:10.1044/jshr.3203.512
History: Received April 27, 1988; Accepted December 13, 1988

Peak articulatory velocity of the lower lip and temporal coordination between the upper and lower lips were studied in 5 neurologically impaired subjects with speech behaviors consistent with a diagnosis of apraxia of speech. Differences in velocity and the timing between the movement onset of the two lips were compared for accurate and inaccurate productions of words. Peak articulatory velocity also was measured during the production of the syllable [pæ] and during a nonverbal movement. There were no systematic differences across accurate and inaccurate productions of words in peak articulatory velocity or movement onsets of the two lips. Furthermore, there were no systematic changes in movement velocity related to speech rate. We conclude that some apraxic speakers do not have a defect in the ability to produce high movement velocities.

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