Assessment of Oral-Motor Reflexes in Stutterers and Normal Speakers Preliminary Observations Research Article
Research Article  |   September 01, 1983
Assessment of Oral-Motor Reflexes in Stutterers and Normal Speakers
 
Author Affiliations & Notes
  • Anne Smith
    University of Washington, Seattle
  • Erich S. Luschei
    University of Washington, Seattle
Article Information
Research Articles
Research Article   |   September 01, 1983
Assessment of Oral-Motor Reflexes in Stutterers and Normal Speakers
Journal of Speech, Language, and Hearing Research, September 1983, Vol. 26, 322-328. doi:10.1044/jshr.2603.322
History: Received March 12, 1982 , Accepted December 6, 1982
 
Journal of Speech, Language, and Hearing Research, September 1983, Vol. 26, 322-328. doi:10.1044/jshr.2603.322
History: Received March 12, 1982; Accepted December 6, 1982

Reflex responses of nine stutterers and nine normal speakers to low-level tactile and auditory stimuli were measured as changes in isometric molar biting force and masseter muscle activity. Tactile stimuli (mechanical displacement of the tissue) were applied to five intraoral and perioral sites. The acoustic stimulus was noise gated on for 12 msec. These low-level stimuli significantly modulated jaw-closing force and muscle activity in most of the subjects tested. In general, the initial effect of both auditory and tactile stimuli was suppression, although the initial response was excitation in some subjects with some forms of tactile stimulation. Within both groups of subjects, the amplitude and direction of reflex responses, particularly to mechanical stimuli, were highly variable between subjects, but these measures were stable within an individual over repeated tests.

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