Linguistics Colloquium: Christina Hagedorn (College of Staten Island, CUNY)
NOV 07, 2019 | 4:15 PM TO 6:15 PM
The Graduate Center
365 Fifth Avenue
November 07, 2019: 4:15 PM-6:15 PM
Christina Hagedorn (College of Staten Island, CUNY) presents:
"Retain or Revise? The Effects of Lingual Resection on Speech Production"
This work aims to investigate the articulatory behavior of post-operative glossectomy patients using real-time MRI. While altered lingual movement patterns and compensatory mechanisms following lingual resection have been observed using a variety of imaging modalities, no studies, to date, have (i) investigated compensatory speech mechanisms using real-time MRI, which provides a dynamic view of the entire vocal tract, (ii) directly aimed to shed light on the nature of the lingual representation assumed by patients’ motor systems post-operatively, or (iii) attempted to quantify lingual flexibility using principal component analysis. In this work, post-operative consonant and vowel articulation is characterized using novel analytical techniques. Patient data is compared to results of a two-condition task dynamic simulation in which the system takes into account the reduced tongue size or assumes the pre-operative tongue size. The data suggest that (i) patterns in patients’ vocal tract area functions and acoustic vowel spaces closely reflect the particular loci of their resections, (ii) oral and base of tongue cancer patients exhibit articulatory compensation in consonant production, (iii) the simulation that does not take into account reduction in tongue size best approximates patient data, but that there is evidence for compensation using the jaw, and (iv) patients exhibit less lingual flexibility than do typical speakers.