@article{oai:niigata-u.repo.nii.ac.jp:00026044,
 author = {五十嵐, 雅子 and 島田, 久八郎},
 issue = {2},
 journal = {新潟歯学会雑誌, 新潟歯学会雑誌},
 month = {Dec},
 note = {The reflex control from the molars to the muscles related to lateral jaw movement was investigated. Excitatory and inhibitory responses of the zygomatico-mandibular, temporal, masseter and medial pterygoid muscles were recorded electromyographically with the pressure stimulation (about 1kg, 3sec )to the upper molars in the lightly anaesthetized rabbits. Excitatory reflexes could be easily elicited in the ipsilateral zygomatico-mandibular, temporal and masseter muscles, and the contralateral medial pterygoid muscle in low background activity (BGA : muscle activity before stimulation) by the unilateral molar stimulation. These reflex excitations decreased as BGA increased. Inhibitory reflexes could be easily elicited in the contralateral zygomatico-mandibular, temporal and masseter muscles, and the ipsilateral medial pterygoid muscle in high BGA. These reflex inhibitions decreased as BGA decreased. Right and left muscles related to lateral jaw movement (zygomatico-mandibular, temporal and medial pterygoid muscles) were controlled by reciprocal reflex with unilateral molar stimulation respectively. Both sides of masseter muscles which are synergists in jaw closing movement and antagonists in lateral jaw movement were controlled synergically in low and high level of BGA and reciprocally in medium level of BGA. It was confirmed that integrative reflex controls of both sides of these muscles facilitate the jaw movement to the stimulated side., 下顎の側方運動時に機能する咀嚼筋が､歯根膜からの入力によりどの様な反射性制御を受けているのかを解明するために本実験が行われた｡実験にはハロタンにて浅く麻酔したウサギを用いた｡上顎臼歯部に咬合面より､強さ約1kg､持続約3秒の圧刺激を加え､その時の頬骨下顎筋､側頭筋､咬筋､内側翼突筋の筋電図が記録された｡上顎臼歯咬合面に圧刺激を加えると､刺激側の頬骨下顎筋､側頭筋､咬筋､刺激側と反対側の内側翼突筋には興奮反射が起こりやすかった｡刺激側の内側翼突筋､刺激側と反対側の頬骨下顎筋､側頭筋､咬筋には抑制反射が起こりやすかった｡左右の筋の機械的な機能が拮抗的である頬骨下顎筋､側頭筋､内側翼突筋に於いては､それぞれ両側の筋に対して反射的に相反性制御がなされていた｡左右の筋が下顎の開閉に関しては協調的に､側方運動に関しては拮抗的に機能する咬筋では､両側の筋の間に､反射性にも協調的､拮抗的な制御機構が認められた｡これら4筋群の反射性筋活動により､作業側での咬合が増強される｡この様に臼歯歯根膜から咀嚼筋には､下顎の側方運動に関して統合的な反射性制御が行われていることが明らかになった｡},
 pages = {19--30},
 title = {ウサギの下顎側方運動に関与する筋群への臼歯からの反射性制御},
 volume = {21},
 year = {1991}
}