Comparative study of mandibular movements and masticatory muscle activities between the sleep and wake states in the freely moving rabbit.

自由活动兔子睡眠和清醒状态下下颌运动和咀嚼肌活动的比较研究。

• 批准号: 02670834
• 负责人: YAMADA Yoshiaki
• 金额: $ 1.41万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02670834/
• 关键词: Jaw movement; Masticatory EMG; EEG; Chewing; Drinking; Grooming; Bruxism; Freely moving rabbit; 咀嚼筋; 摂食行動; 飲水行動; 無麻酔; 無拘束; ウサギ; 睡眠; 咀嚼筋活動

Freely moving rabbits were stailied 1) to identify jaw behaviors on the basis of jaw movement trajectories and masticatory muscle activities, and 2) to observe influences of the head fixation on jaw behaviors during hard or soft food chewing. Jaw movements were traced usins a magnet-magnetic sensing system. The jaw tracking system consisted of two magnet sensors fixed on the animal's head and a small magnet fixed in the mandible. Additional sensor was set on the head to pick up the earth's ugnetiss so that the head movements could be recorded. Muscle. activities were induced using bipolar electrodes made of silver, which were implanted under the skin. The target included bilateral superficial m=ter and digastric muscles, unilateral deep reasseter, medial pterygoid, sylohyoid, sternohyoid, thyrohyoid muscles. EEG was induced using pin electrodes screwed into the skull bone. All the signals were conveyed to a connector pedestal under the skin and fed into a recording system by flexible c … More ables. For recording animals were placed in a cage (70 cm X 70 cm). It began at least four days after the operations. In a period of awaking, three rhythmical and characteristic jaw behaviors including chewing, drinking and grooming behavior were recognized in the recordings. In a period of sleeping, short EMG bursts similar to clenching or grindins were recorded in the closing muscles. The basic pattern in the chewing movements recorded from freely moving rabbits was identical to those of the animals their heads fixed. Grooming behavior was studied and the body licking was found to be a rhythmical jaw movement with characteristic jaw movements. Hard food and soft food were tested and the results opposed to those observed from animals head fixed. In this study, hard soft was found to have longer cycle time than that of hard food. It is suggested that the opening time should be considered as the determinant of the change in the cycle time. The freely moving rabbits employed here could be a reliable model to study jaw motor system. Less

本实验采用自由活动的家兔，通过观察其下颌运动轨迹和咀嚼肌活动来识别下颌行为，并观察头固定对咀嚼硬、软食物时下颌行为的影响。使用磁-磁感应系统追踪下颌运动。颌骨跟踪系统由固定在动物头部的两个磁铁传感器和固定在下颌骨中的一个小磁铁组成。在头部上设置了额外的传感器来拾取地球的引力，从而可以记录头部的运动。肌肉.使用植入皮肤下的由银制成的双极电极来诱发活动。靶点包括双侧浅肌、二腹肌、单侧深再置肌、翼内肌、舌骨肌、胸骨舌骨肌、甲状舌骨肌。使用拧入颅骨的针电极诱导EEG。所有的信号都被传送到皮肤下的连接器基座上，并通过柔性电缆送入记录系统。 ...更多信息 能力。为了记录，将动物置于笼中（70 cm X 70 cm）。它至少在手术后四天开始。在清醒状态下，记录到咀嚼、饮水和梳理三种有节奏的特征性下颌行为。在睡眠期间，在闭合肌肉中记录到类似于紧握或研磨的短EMG爆发。从自由运动的兔子记录的咀嚼运动的基本模式与它们的头部固定的动物的咀嚼运动的基本模式相同。梳理行为的研究和身体舔被发现是一个有节奏的下颌运动与特征的下颌运动。对硬食物和软食物进行了测试，结果与从动物头部固定观察到的结果相反。在这项研究中，发现硬软食品的循环时间比硬食品长。建议将开启时间视为周期时间变化的决定因素。自由活动的家兔是研究下颌运动系统的可靠模型。少

项目成果

石岡 靖: "顎口腔機能分析の基礎とその応用" デンタルダイヤモンド, 400 (1991)

Yasushi Ishioka：“口颌功能分析基础及其应用”Dental Diamond，400（1991）

山田 好秋: "無麻酔・無拘束のウサギから記録された摂食時、安静時、並びに睡眠時の咀嚼筋活動と下顎運動" 下顎運動機能とEMG論文集. 8. 161-164 (1990)

Yoshiaki Yamada：“在进食、休息和睡眠期间记录未麻醉和不受约束的兔子的咀嚼肌活动和下颌运动”《下颌运动功能和肌电图杂志》8. 161-164 (1990)。

新井 映子: "摂取食品の形状が咀嚼運動に与える影響" 歯基誌. 34. (1992)

Eiko Arai：“摄入食物的形状对咀嚼运动的影响”《牙科杂志》34。（1992）

山田 好秋: "咀嚼周期時間を変動させる要因" 下顎運動機能とEMG論文系. 10. (1992)

Yoshiaki Yamada：“影响咀嚼周期时间的因素”下颌运动功能和 EMG 论文系列 10。（1992 年）

M.Fujisawa: "Surface electromyographic electrode pair with builtーin bufferーamplifiers." J.Prosthet.Dent.63. 350-352 (1990)

M.Fujisawa：“带有内置缓冲放大器的表面肌电图电极对。”J.Prosthet.Dent.63 (1990)。