Cara E Stepp1, Rosemary A Lester-Smith2, Defne Abur2, Ayoub Daliri2, J Pieter Noordzij3, Ashling A Lupiani2. 1. Department of Speech, Language, and Hearing Sciences, Boston University, MassachusettsDepartment of Biomedical Engineering, Boston University, MassachusettsDepartment of Otolaryngology-Head and Neck Surgery, Boston University School of Medicine, Massachusetts. 2. Department of Speech, Language, and Hearing Sciences, Boston University, Massachusetts. 3. Department of Speech, Language, and Hearing Sciences, Boston University, MassachusettsDepartment of Otolaryngology-Head and Neck Surgery, Boston University School of Medicine, Massachusetts.
Abstract
Purpose: The vocal auditory-motor control of individuals with hyperfunctional voice disorders was examined using a sensorimotor adaptation paradigm. Method: Nine individuals with hyperfunctional voice disorders and 9 individuals with typical voices produced sustained vowels over 160 trials in 2 separate conditions: (a) while experiencing gradual upward perturbations in the fundamental frequency (fo) of their auditory feedback (shift-up) and (b) under no auditory perturbation (control). The shift-up condition consisted of 4 ordered (fixed) phases: baseline (no perturbation), ramp (gradual increases in heard fo), hold (a consistently higher heard fo), and after-effect (no perturbation). Adaptive responses were defined as the difference in produced fo during control and shift-up conditions. Results: Adaptive responses were significantly different between groups. Individuals with typical voices generally showed compensatory adaptive responses, with decreased fo during the ramp and hold phases. Conversely, many individuals with hyperfunctional voice disorders instead displayed the opposite effect by following the direction of the perturbation. When fo was experimentally increased, speakers further increased their fo. Conclusion: Results indicate that some individuals diagnosed with hyperfunctional voice disorders have disrupted auditory-motor control, suggesting atypical neurological function. These findings may eventually allow for the development of new interventions for hyperfunctional voice disorders.
Purpose: The vocal auditory-motor control of individuals with hyperfunctional voice disorders was examined using a sensorimotor adaptation paradigm. Method: Nine individuals with hyperfunctional voice disorders and 9 individuals with typical voices produced sustained vowels over 160 trials in 2 separate conditions: (a) while experiencing gradual upward perturbations in the fundamental frequency (fo) of their auditory feedback (shift-up) and (b) under no auditory perturbation (control). The shift-up condition consisted of 4 ordered (fixed) phases: baseline (no perturbation), ramp (gradual increases in heard fo), hold (a consistently higher heard fo), and after-effect (no perturbation). Adaptive responses were defined as the difference in produced fo during control and shift-up conditions. Results: Adaptive responses were significantly different between groups. Individuals with typical voices generally showed compensatory adaptive responses, with decreased fo during the ramp and hold phases. Conversely, many individuals with hyperfunctional voice disorders instead displayed the opposite effect by following the direction of the perturbation. When fo was experimentally increased, speakers further increased their fo. Conclusion: Results indicate that some individuals diagnosed with hyperfunctional voice disorders have disrupted auditory-motor control, suggesting atypical neurological function. These findings may eventually allow for the development of new interventions for hyperfunctional voice disorders.
Authors: Hasini R Weerathunge; Defne Abur; Nicole M Enos; Katherine M Brown; Cara E Stepp Journal: J Speech Lang Hear Res Date: 2020-08-03 Impact factor: 2.297
Authors: Hasini R Weerathunge; Gabriel A Alzamendi; Gabriel J Cler; Frank H Guenther; Cara E Stepp; Matías Zañartu Journal: PLoS Comput Biol Date: 2022-06-23 Impact factor: 4.779
Authors: Jarrad H Van Stan; Se-Woong Park; Matthew Jarvis; Joseph Stemple; Robert E Hillman; Dagmar Sternad Journal: J Speech Lang Hear Res Date: 2020-12-07 Impact factor: 2.297