ERIC Number: EJ1147905
Record Type: Journal
Publication Date: 2017-Jun
Abstractor: As Provided
Evidence for Auditory-Motor Impairment in Individuals with Hyperfunctional Voice Disorders
Stepp, Cara E.; Lester-Smith, Rosemary A.; Abur, Defne; Daliri, Ayoub; Noordzij, J. Pieter; Lupiani, Ashling A.
Journal of Speech, Language, and Hearing Research, v60 n6 p1545-1550 Jun 2017
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 ("f[subscript o]") 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 "f[subscript o]"), hold (a consistently higher heard "f[subscript o]"), and after-effect (no perturbation). Adaptive responses were defined as the difference in produced "f[subscript o]" 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 "f[subscript o]" 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 "f[subscript o]" was experimentally increased, speakers further increased their "f[subscript o]". 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.
Descriptors: Evidence, Voice Disorders, Motor Development, Auditory Tests, Vowels, Incidence, Control Groups, Experimental Groups, Anxiety, Perceptual Motor Learning
American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: email@example.com; Web site: http://jslhr.pubs.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Sponsor: National Institute on Deafness and Other Communication Disorders (NIDCD)
Authoring Institution: N/A
Grant or Contract Numbers: DC015570; DC004663