High-speed digital imaging and electroglottography of tracheoesophageal phonation by Amatsu's method.
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.
Saito
Miki
M
Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe.
Imagawa
Hiroshi
H
Sakakibara
Ken-Ichi
K
Tayama
Niro
N
Nibu
Ken-Ichi
K
Amatsu
Mutsuo
M
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