Korean J Otolaryngol-Head Neck Surg.  1998 Aug;41(8):1047-1053.

The Study of Supraglottic Movements and Surface Laryngeal EMG

• Ahn CM
• Jang H
• Lee BS

Abstract

BACKGROUND AND OBJECTIVES: Hyperfunctional voice disorders caused by the over-adduction of the vocal cords have various supraglottic movements during phonation. These various hyperkinetic supraglottic movements will be able to affect the vocal sound production. The aim of this study is to evaluate the relation between supraglottic movements and movement of extralaryngeal muscles using surface laryngeal EMG.
MATERIALS AND METHODS
The subject who had normal anatomic and physiologic laryngeal function produced the vocal sounds of the 3 types of supraglottic movement. In each type, when three different pitch sounds were produced, surface laryngeal EMG was recorded and perceptual and acoustic analysis of vocal sound were performed.
RESULTS
Voice with contracted supraglottic movement had strained sound in perceptual analysis, increased jitter and shimmer in MDVP, and increased amplitude in surface laryngeal EMG. Voice with lowered and widened supraglottic movement had resonant sound in perceptual analysis, decreased jitter and shimmer in MDVP, decreased amplitude in surface laryngeal EMG.
CONCLUSION
Voice was different with various types of supraglottic movements and surface laryngeal EMG findings were also different with various types of supraglottic movements.

Keyword

Supraglottic movement; Surface laryngeal EMG

MeSH Terms

Acoustics
Muscles
Phonation
Vocal Cords
Voice
Voice Disorders