title: High-speed digital imaging and electroglottography of tracheoesophageal phonation by Amatsu's method.
abstract: BACKGROUND
  Our previous findings have indicated that the thyropharyngeal muscles form a retropharyngeal prominence during alaryngeal phonation via the TE fistula. This prominence forms a so-called 'neoglottis', which is thought to function as the vibratory source. To better understand the mechanism of TE phonation, we analyzed the vibration of the neoglottis using electroglottography (EGG) and a high-speed digital imaging system.
  
  
  METHODS
  Two volunteers who use TE phonation for their daily speech communication were subjected to this study. The vibrations of the neoglottis were recorded simultaneously as EGG and high-speed imaging with acoustic signals.
  
  
  RESULTS
  The vibrations of the neoglottis, recorded by means of high-speed digital imaging, were exactly synchronized with the waveforms of the acoustic signals and EGG.
  
  
  CONCLUSIONS
  These results further confirm the neoglottis as the source of vibration during tracheoesophageal (TE) phonation.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe.
authors.forename: Miki
authors.initials: M
authors.lastname: Saito
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imagawa
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Sakakibara
authors.forename: Niro
authors.initials: N
authors.lastname: Tayama
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Nibu
authors.forename: Mutsuo
authors.initials: M
authors.lastname: Amatsu
mesh_terms: D000368:Aged; D004568:Electrodiagnosis / Q000295:instrumentation*; D004571:Electrokymography / Q000295:instrumentation*; D005931:Glottis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D007821:Laryngeal Muscles / Q000000981:diagnostic imaging* / Q000503:physiopathology; D007822:Laryngeal Neoplasms / Q000473:pathology / Q000601:surgery; D007825:Laryngectomy / Q000534:rehabilitation*; D008297:Male; D008838:Microcomputers; D008875:Middle Aged; D009367:Neoplasm Staging; D010609:Pharyngeal Muscles / Q000000981:diagnostic imaging* / Q000503:physiopathology; D010699:Phonation / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013018:Sound Spectrography / Q000295:instrumentation; D013068:Speech Production Measurement / Q000295:instrumentation; D013072:Speech, Esophageal; D014833:Voice Quality / Q000502:physiology