Journal of Communication Disorders, Deaf Studies & Hearing Aids
Open Access

Margaret Vento-Wilson

Publications

• 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, Shrikanth S. Narayanan  Betty McMicken, Frederico Salles, Shelley Von Berg, Margaret Vento-Wilson, Kelly Rogers, Asterios Toutios, 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

  Abstract PDF

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