Mandibular Advancement Modulates Respiratory-Related Genioglossus Electromyographic Activity

Satoru Tsuiki; Takashi Ono; Takayuki Kuroda

doi:10.1055/s-2000-9836

Sleep and Breathing, Inhaltsverzeichnis

Sleep Breath 2000; 04(2): 053-058
DOI: 10.1055/s-2000-9836

Mandibular Advancement Modulates Respiratory-Related Genioglossus Electromyographic Activity

Satoru Tsuiki, Takashi Ono, Takayuki Kuroda

Maxillofacial Orthognathics, Maxillofacial Reconstruction, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan Reprint requests: Dr. Takashi Ono, Maxillofacial Orthognathics, Maxillofacial Reconstruction, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 5-45, Yushima 1-chome, Bunkyo-ku,Tokyo, 113-8549 Japan. E-mail: t=ono.ort2@dent.tmd.ac.jp

Abstract

ABSTRACT

The purpose of this study was to determine if mandibular advancement had any effects on the respiratory-related electromyographic (EMG) activity of the genioglossus (GG) muscle in normal adults for both the upright and supine positions. Spontaneous GG EMG activity during quiet nasal breathing was recorded in 5 mandibular positions: centric occlusion (CO), maximal protrusion (MAX), 25% (MAX₂₅), 50%(MAX₅₀), and 75%(MAX₇₅) of MAX. The maximal GG EMG activities during inspiration (GG_insp) and minimal GG EMG activities during expiration (GG_exp) were compared. The GG_insp and GG_exp significantly increased with mandibular advancement in both body positions. Furthermore, there were significant differences in both GG_insp and GG_exp between CO and more protruded mandibular positions. However, no significant differences were found in the GG_insp at MAX compared to that at MAX₇₅, and in the GG_exp at MAX compared to those at MAX₇₅ and MAX₅₀. These results suggest that augmentation of the respiratory-related GG EMG activity with mandibular advancement diminishes the propensity of the upper airway to collapse. Moreover, the lack of any remarkable difference between the GG_insp at MAX₇₅ and that at MAX may be relevant to the effectiveness of oral appliances in the treatment of obstructive sleep apnea.

KEYWORD

genioglossus muscle - mandibular advancement - oral appliance - obstructive sleep apnea

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Referenzen

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