title: False Vocal Fold Characteristics in Presbylarynges and Recurrent Laryngeal Neuropathy.
abstract: OBJECTIVE
  Conflicting data exist regarding false vocal fold (FVF) anatomy; it is unclear if this structure is an extension of the thyroarytenoid muscle or an independent muscle system. This confusion is amplified by diverse clinical findings in the setting of unilateral recurrent laryngeal neuropathy and presbylarynges. We sought to characterize FVF behavior in these contexts.
  
  
  METHODS
  Laryngoscopic/stroboscopic examinations from 11 patients with unilateral recurrent laryngeal nerve paresis and 12 patients with presbylarynges were reviewed by 4 laryngologists, blinded to the goal of the study but informed of diagnosis. Variables related to FVF structure and function at rest and during phonation were rated.
  
  
  RESULTS
  In recurrent laryngeal neuropathy, no significant association between atrophic/paretic vocal fold (VF) and FVF size was observed at rest (P = .69). During phonation, FVF compression was noted bilaterally; contralateral FVF hypertrophy was more common (P = .002). In presbylarynges, neither FVF size at rest (P = .86) nor compression during phonation (P = .37) was associated with the more atrophic VF; FVF compression/hypertrophy was common.
  
  
  CONCLUSIONS
  Consistent with clinical dogma, FVF compression was more common contralateral to VF neuropathy. This finding, however, was inconsistent and may suggest individual variability in FVF innervation and/or morphology. Intra- and interrater reliability of these clinical findings was poor.
authors: NYU Voice Center, Department of Otolaryngology-Head and Neck Surgery, New York University School of Medicine, New York, New York, USA.
authors: Michael
authors: M
authors: Persky
authors: NYU Voice Center, Department of Otolaryngology-Head and Neck Surgery, New York University School of Medicine, New York, New York, USA.
authors: Brian
authors: B
authors: Sanders
authors: University of Pittsburgh Voice Center, Department of Otolaryngology-Head and Neck Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
authors: Clark A
authors: CA
authors: Rosen
authors: School of Communication Sciences and Disorders, The University of Memphis, Memphis, Tennessee, USA.
authors: Joel
authors: J
authors: Kahane
authors: Departments of Population Health and Enivronmental Medicine, New York University School of Medicine, New York, New York, USA.
authors: Yixin
authors: Y
authors: Fang
authors: NYU Voice Center, Department of Otolaryngology-Head and Neck Surgery, New York University School of Medicine, New York, New York, USA.
authors: Milan R
authors: MR
authors: Amin
authors: NYU Voice Center, Department of Otolaryngology-Head and Neck Surgery, New York University School of Medicine, New York, New York, USA ryan.branski@nyumc.org.
authors: Ryan C
authors: RC
authors: Branski
mesh_terms: D001284:Atrophy; D055154:Dysphonia / Q000150:complications*; D006801:Humans; D006984:Hypertrophy; D007828:Laryngoscopy; D010699:Phonation; D049489:Stroboscopy; D014826:Vocal Cord Paralysis / Q000150:complications*; D014827:Vocal Cords / Q000473:pathology*
keywords: false vocal fold; presbylarynges; vocal fold neuropathy; voice