Yamada Y, Uchida K, Sato T
School of Dentistry, Nagasaki University, Japan.
Dent Jpn (Tokyo). 1990;27(1):35-9.
Jaw movements and masticatory muscle activities were recorded in freely moving rabbits. During 5 hours of continuous recording, three states were recognized, namely, sleep, rhythmical jaw movements, and wake without any major jaw movements. The rhythmical jaw movements included chewing, drinking, and grooming and were similar in characteristics to those recorded in immobilized animals. During sleep, two kinds of masseter muscle behaviors with jaw movement features were recorded: one characterized by a short EMG bursts and a pause in jaw movements, considered similar to clenching, and the other characterized by cyclic bursts and lateral jaw excursion, a grinding-like movement. The latter was correlated with light sleep, thus suggesting a resemblance between the grinding-like behavior and bruxism.
在自由活动的兔子身上记录下颌运动和咀嚼肌活动。在连续记录的5小时内，识别出三种状态，即睡眠、有节律的下颌运动以及无明显下颌运动的清醒状态。有节律的下颌运动包括咀嚼、饮水和梳理毛发，其特征与在固定动物身上记录到的相似。在睡眠期间，记录到两种具有下颌运动特征的咬肌行为：一种以短肌电图爆发和下颌运动暂停为特征，被认为类似于咬紧牙关；另一种以周期性爆发和下颌侧向偏移为特征，类似研磨运动。后者与浅睡眠相关，因此表明这种类似研磨的行为与磨牙症之间存在相似之处。
