title: Impairment of voice quality in paradoxical vocal fold motion dysfunction.
abstract: OBJECTIVE
  To compare subjective and objective voice-quality parameters between asymptomatic paradoxical vocal fold motion dysfunction (PVFMD) patients and healthy individuals.
  
  
  METHODS
  Prospective.
  
  
  METHODS
  A total number of 12 patients with PVFMD and 12 healthy control subjects had voice evaluations by means of laryngostroboscopy, acoustic analysis (jitter, shimmer, and harmonics-to-noise ratio [HNR]), aerodynamic measurements (maximum phonation time [MPT], s/z ratio), and perceptual analysis (Grade, Roughness, Breathiness, Asthenicity, and Strain Scale [GRBAS] and Voice Handicap Index-10 [VHI-10] scales). Evaluations were conducted when all the patients were asymptomatic.
  
  
  RESULTS
  False vocal cord adduction, anteroposterior constriction of the supraglottic larynx, decreased amplitude, and decreased mucosal wave were observed in the great majority of the PVFMD patients during laryngostroboscopy. Mean jitter and shimmer rates were significantly high in PVFMD patients and there was no significant difference in mean HNR between groups (P<0.05). Mean MPT was significantly long in control subjects (P<0.05) and mean s/z ratio was nearly equal between patients and control subjects. There was a statistically significant difference between groups about GRBAS and VHI-10 scales (P<0.05).
  
  
  CONCLUSIONS
  Based on the subjective and objective voice parameters, voice quality is significantly impaired in asymptomatic PVFMD patients when compared with the healthy control subjects.
authors.affiliation: Department of Otolaryngology, Gaziomanpasa University, Tokat, Turkey. kursatyelken@yahoo.com
authors.forename: Kursat
authors.initials: K
authors.lastname: Yelken
authors.forename: Erdogan
authors.initials: E
authors.lastname: Gultekin
authors.forename: Mehmet
authors.initials: M
authors.lastname: Guven
authors.forename: Ahmet
authors.initials: A
authors.lastname: Eyibilen
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Aladag
mesh_terms: D000328:Adult; D000368:Aged; D058070:Asymptomatic Diseases; D001307:Auditory Perception; D016022:Case-Control Studies; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D007818:Laryngeal Diseases / Q000175:diagnosis / Q000503:physiopathology*; D007828:Laryngoscopy; D008297:Male; D008875:Middle Aged; D010699:Phonation; D011446:Prospective Studies; D013061:Speech Acoustics; D049489:Stroboscopy; D011795:Surveys and Questionnaires; D013997:Time Factors; D014827:Vocal Cords / Q000503:physiopathology*; D014832:Voice Disorders / Q000175:diagnosis / Q000503:physiopathology*; D014833:Voice Quality