One method to find out a factor of masticatory disturbance

为了找出引起咀嚼障碍的因素，我注意到咀嚼过程中咀嚼肌肉的相关性。咀嚼需要许多肌肉的协调。肌肉通常由一些层组成，但并不是所有的层都以相似的方式同时起作用。因此，我评估了兔咀嚼颗粒、胡萝卜和干草时咬肌深层前后区域的功能。动物预先注射维安泰，肌内注射。将套管插入气管，用1-2%氟烷在50%氧气/ 50%氧化亚氮混合物中麻醉动物。手术在吸入麻醉下进行。采用双侧皮下注射针将带裸钩末端的树脂涂覆铜电极插入翼侧、翼内、前深咬肌、后深咬肌、中、浅咬肌和二腹肌6块肌肉共12个位置。咀嚼侧闭合肌中，浅咬肌与翼状内侧肌的活动相关性较高，咀嚼侧深前咬肌与后深咬肌的活动相关性不高。这表明，虽然这两块肌肉在闭锁时同时工作，但各自有不同的功能。咀嚼侧翼内肌和浅肌的活动与非咀嚼侧翼内肌和浅肌的活动具有良好的相关性。咀嚼侧前深咬肌和后深咬肌的活动也与非咀嚼侧翼内肌和浅咬肌的活动相关。咀嚼侧闭合肌活动与非咀嚼侧闭合肌活动的相关性表现为：1)两侧前深咬肌活动相关性较低。2)非咀嚼侧后深咬肌的活动与咀嚼侧后深咬肌的活动相关，而与咀嚼侧其他闭合肌的活动无关。这些结果对咀嚼障碍的诊断有一定的参考价值

As find out as factor about masticatory disturbance, I take notice of the correlation of the masticatory muscies during mastication. Mastication requires the coordination of many muscles. Muscles often consist of some layers, but not all the layers function simultaneously in a similar way. Therefore, I evaluated the function of the anterior and posterior areas of the deep portion of the masseter of rabbits during mastication of pellet, carrot and hay. The animals were premedicated with Vetranquil, applied intramusculary. A cannula was introduced into the trachea and the animals was anesthetized with 1-2% halothane in a 50% oxygen/ 50% nitrous oxide mixture. Surgery was performed under inhalation anesthesia. Resin coated copper electrodes, provided with bare hooked ends were inserted using a hypodermic needle bilaterally in the following 6 muscles, in a total of 12 locations: the lateral pterygoid, the medial pterygoid, the anterior deep masseter, the posterior deep masseter, the center … More of the superficial masseter and the digastric muscles. Among the cosing muscles on the chewing side, there was a high correlation between the activities of superficial masseter and medial pterygoid, but there was no correlation between the activities of anterior deep masseter and posterior deep masseter on the chewing side. This suggested that although these two muscles work simultaneously during closing, each has a different function. The activities of medial pterygoid and superficial massete on the chewing side were well correlated with those of the same muscles on the non-chewing side. The activities of anterior deep masseter and psoterior deep masseter on the chewing side were also correlated with those of the medial pterygoid and superficial masseter on the nonchewing side. The correlations between the activities of closing muscles on the chewing side and those on the non-chewing side are characterized by the following points: 1) The correlation between the activities of anterior deep masseters on both sides is low. 2) The activities of posterior deep masseter on the non-chewing side is correlated with those of the posterior deep masseter on the chewing side, but not with those of the other closing muscles on the chewing side. These results suggest very usefull to diagnose about masticatory disturbance Less