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Journal of Speech and Hearing Research Vol.37 1271-1283 December 1994.
© American Speech-Language-Hearing Association
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Intelligibility and Nonspeech Orofacial Strength and Force Control Following Traumatic Brain Injury

Monica A. McHenry 1
John T. Minton 1
Robin L. Wilson 1

Yolanda V. Post 1
1 Galveston Institute of Human Communication The Transitional Learning Community at Galveston Galveston, TX

Objective measures of nonspeech orofacial strength and force control were obtained for 20 individuals with traumatic brain injury. The dynamic and static force generating abilities of the upper lip, lower lip, tongue, and jaw were assessed. Based on sentence intelligibility scores, the subjects were divided into two groups, more and less intelligible. Force measures included reaction time, slope, derivative, peak overshoot, and first- and second-half mean hold and standard deviation. Groups differed only in the ability to sustain the 2 N force level with the tongue. Other potential contributors to the differences in intelligibility are discussed.

KEY WORDS: orofacial strength, force control, intelligibility, traumatic brain injury

Submitted on May 5, 1993
Accepted on June 8, 1994


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