spasmodic dysphonia, lip movement, articulatory behavior, botulinum
In order to learn about articulatory behavior in adductor spasmodic dysphonia (SD), the lip movements of seven individuals with SD and three control speakers were recorded with strain gauges as they repeated 'Buy Bobby a puppy' in voiced and whispered conditions. Results included weaker bilabial coordination, qualitative differences in the shape of lip movement profiles, and an increased number of lip velocity peaks in the speakers with SD. These participants received percutaneous botulinum toxin injection to the thyroarytenoid muscle, and were then recorded again. The pre- vs. post-treatment data revealed that improved vocal activity was associated with fewer articulatory disturbances. These findings lend support to the hypothesis that articulatory function in SD may at least in part be disturbed because of the coupling between the larynx and the lips during speech.
Original Publication Citation
Dromey, C., Reese, A., & Howey, S. (2007). Lip kinematics in spasmodic dysphonia before and after treatment with botulinum toxin. Journal of Medical Speech-Language Pathology, 15, 263-277.
BYU ScholarsArchive Citation
Dromey, Christopher; Reese, Aubrey; and Howey, Susan, "Lip Kinematics in Spasmodic Dysphonia before and after Treatment with Botulinum Toxin" (2007). Faculty Publications. 1775.
David O. McKay School of Education
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