Tongue, Jaw, and Lip Muscle Activity and Jaw Movement during Experimental Chewing Efforts in Man
- 1 August 1996
- journal article
- research article
- Published by SAGE Publications in Journal of Dental Research
- Vol. 75 (8), 1598-1606
- https://doi.org/10.1177/00220345960750081201
Abstract
The electromyographic (EMG) activity of the human genioglossus (GG) muscle during chewing efforts is not fully understood. In this study, the EMG activity of the human GG muscle during unilateral gum chewing was illustrated and correlated with the activities in the anterior temporalis (AT), the anterior digastric (DG), and the inferior orbicularis oris (OI) muscles. GG muscle activity was measured with customized surface electrodes, while other muscles were recorded with conventional surface electrodes. EMG activities during tongue displacement and the articulation of long vowels, recorded by the customized electrodes, were consistent with the recordings obtained by fine wire electrodes placed in the GG muscle. Jaw displacement was monitored by means of a kinesiograph with a transducer attached to the mandibular central incisors. Mean normalized GG muscle activity showed an onset in the last one-fifth of the intercuspal phase, gradually increasing during jaw-opening, and at its greatest immediately before the maximum jaw-opening position. It then decreased during jaw-closing and ceased in intercuspation but showed a small rebound in the third fifth of the intercuspal phase. The GG muscle burst showed phase lags with the DG and 01 muscles and an opposite phase with the AT muscle (all P < 0.0001). All correlations were statistically significant (all P < 0.0001, r values between 0.88 and 0.97). The results suggest central coordination of the timing of the activities of the jaw, lip, and tongue muscles in chewing.Keywords
This publication has 31 references indexed in Scilit:
- An EMG analysis of sequential control cycles of articulatory activity during / ǝp Vp/ utterancesJournal of Phonetics, 1992
- Timing in the movement of jaws, tongue, and hyoid during feeding in the hyrax, Procavia syriacusJournal of Experimental Zoology, 1991
- EMG Recording in Human Lip MusclesJournal of Speech, Language, and Hearing Research, 1986
- A noninvasive intraoral electromyographic electrode for genioglossus muscleJournal of Applied Physiology, 1985
- Peripheral influences on the central pattern-rhythm generator for tongue movements in the ratArchives of Oral Biology, 1985
- A miniature electrode for surface electromyography during speechThe Journal of the Acoustical Society of America, 1983
- Dynamics of Vowel ArticulationLanguage and Speech, 1982
- The activity of the jaw and hyoid musculature in the Virginian opossum, Didelphis virginianaPublished by Springer Science and Business Media LLC ,1977
- A computer-based system for the simultaneous measurement of muscle activity and jaw movement during mastication in manArchives of Oral Biology, 1977
- Electromyography of genioglossus and geniohyoid muscles during deglutitionThe Anatomical Record, 1969