One method to find out a factor of masticatory disturbance

在研究影响咀嚼功能障碍的因素时，笔者注意到咀嚼肌在咀嚼过程中的相关性。咀嚼需要许多肌肉的协调。肌肉通常由一些层组成，但并非所有层都以类似的方式同时发挥作用。因此，本研究对家兔咀嚼颗粒、胡萝卜和干草时，咬肌深部前后区的功能进行了评价。动物预先肌肉注射Vesanitate。将插管引入气管，用1-2%氟烷的50%氧气/ 50%一氧化二氮混合物麻醉动物。手术在吸入麻醉下进行。使用皮下注射针将具有裸露钩状末端的树脂涂覆的铜电极双侧插入以下6块肌肉中，总共12个位置：翼外肌、翼内肌、前深咬肌、后深咬肌、中央肌、前深咬肌和后深咬肌。 ...更多信息 咬肌和二腹肌的肌肉组织在咀嚼肌群中，翼内肌和翼浅肌的肌电活动高度相关，而前深肌和后深肌的肌电活动无相关性。这表明，虽然这两块肌肉在闭合过程中同时工作，但它们各自具有不同的功能。咀嚼侧翼内肌和表浅咬肌的活动与非咀嚼侧相同肌肉的活动密切相关。咀嚼侧前深咬肌和后深咬肌的活动与非咀嚼侧翼内肌和翼浅咬肌的活动也存在相关性。咀嚼侧和非咀嚼侧的闭合肌活动之间的相关性具有以下特点：（1）两侧前深咬肌的活动之间的相关性较低。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不相关。这些结果提示对咀嚼障碍的诊断非常有用

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