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KMID : 0361019980410081047
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Korean Journal of Otolaryngology - Head and Neck Surgery
1998 Volume.41 No. 8 p.1047 ~ p.1053
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The Study of Supraglottic Movements and Surface Laryngeal EMG
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안철민/Cheol Min Ahn
장훈/이보섭/Hoon Jang/Bo Sub Lee
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Abstract
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Background and Objectives: Hyperfunctional voice disorders caused by the over-adduction of the vocal cords have various supraglottic movements during phonation. There 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.
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