Document Type
Article
Publication Date
7-30-2017
Abstract
Purpose: Congenital aglossia is a rare syndrome in which an individual is born without a tongue. The present paper examines articulatory details of the production of multiple consonants by an aglossic speaker.
Method: Real-time magnetic resonance imaging data of the upper airway were collected from the aglossic speaker. Air-tissue boundaries were determined from the video sequences using a segmentation algorithm, and dynamics of vocal-tract constrictions and cross-dimensions were calculated.
Results: The aglossic speaker produced the consonants /t, d, th, l ,r, f ,v, s, sh/ with a bilabial closure instead of a normal lingua-alveolar closure; however, in /t/and /d/ the overall vocal-tract configuration presented a cavity anterior to the constriction, which filtered transient and frication sources in a manner similar to normal alveolar production.
Conclusion: The aglossic speaker, lacking a tongue apex, has developed a bilabial compensatory strategy to produce multiple consonants with her lips.
Recommended Citation
McMicken B, Salles F, Von Berg SV, et al. Bilabial substitution patterns during consonant production in a case of congenital aglossia. J Commun Disord Deaf Stud Hearing Aids. 2017;5(2):175. doi: 10.4172/2375-4427.1000175
Peer Reviewed
1
Copyright
The authors
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Included in
Digestive System Commons, Musculoskeletal System Commons, Speech and Hearing Science Commons, Speech Pathology and Audiology Commons
Comments
This article was originally published in Journal of Communication Disorders, Deaf Studies & Hearing Aids, volume 5, issue 2, in 2017. DOI: 10.4172/2375-4427.1000175