開・閉口筋筋電図による燕下動作の評価法  [in Japanese] Electromyographic Study of Swallowing by Evaluating the Jaw Opening and C1osing Muscles  [in Japanese]

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Author(s)

    • 虫本 栄子 MUSHIMOTO Eiko
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 田中 久敏 TANAKA Hisatoshi
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University
    • 古山 智成 FURUYAMA Tomonari
    • 岩手医科大学歯学部歯科補綴学第一講座 Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University

Abstract

To evaluate mastication, it is important to analyze the whole process from ingestion of foods to swallowing. However, correlation of masticatory sequence with swallowing or tongue movement is not clearly understood yet. The purpose of this study was to identify whether the timing of electromyographic (EMG) activity of jaw opening and closing muscles is differentiated between chewing and swallowingmotions.<BR>Five healthy young dentate subjects were asked to randomly chew the test foods (pudding, raisin, and mixed) until swallowing. The surface EMGs of the bilateral posterior temporal, masseter, myohyoid, and anterior belly of digastric muscles were recorded simultaneously with mandibular movements using Mandibular Kinesiograph (Myo-Tronics). An accelerometer was applied to the larynx for extracting the swallowing cycles. Time differences of burst onset (TDBO) among workingside jaw opening and closing muscles were observed until swallowing.<BR>TDBOs among four muscles increased during the raisin chewing sequence, and decreased during pudding chewing. The results suggested that TDBO increases during crushing and/or chewing motions, and decreases during swallowing motion.<BR>In conclusion, evaluating time differences of EMG burst onset among the jaw opening and closing muscles might be useful for evaluating swallowing behavior.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(2), 292-299, 2000-04-10

    Japan Prosthodontic Society

References:  25

Cited by:  7

Codes

  • NII Article ID (NAID)
    10008155392
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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