Journal of Communication Disorders, Deaf Studies & Hearing Aids
Open Access
ISSN: 2375-4427
ISSN: 2375-4427
Shelley Von Berg
Tanzania
Research Article
Bilabial Substitution Patterns during Consonant Production in a Case of Congenital Aglossia
Author(s): Betty McMicken, Frederico Salles, Shelley Von Berg, Margaret Vento-Wilson, Kelly Rogers, Asterios Toutios and Shrikanth S NarayananBetty McMicken, Frederico Salles, Shelley Von Berg, Margaret Vento-Wilson, Kelly Rogers, Asterios Toutios and Shrikanth S Narayanan
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 .. View More»
DOI:
10.4172/2375-4427.1000175
