FUNCTIONAL RELATIONS BETWEEN JAW, HEAD, NECK AND BACK MUSCLES

1.作为实验前研究，观察了23名健康受试者头、颈、肩和背部的不适。结果：1.等长水平颌骨运动负荷可诱发不愉快、肥胖感、疼痛、窒息、运动障碍和强迫感，提示颌骨、头、颈、背部肌肉之间存在功能关系。(1)8名健康受试者进行水平等长下颌运动，最大限度地随意收缩颌肌，直到他们不能忍受这项任务。(2)在32个试验中，超过94%的试验中，肌电在执行任务时的幅度高于静息状态，在超过78%的试验中，肌电爆发的时间变化与运动的开始-偏移同步。(3)在超过72%的al…试验中L实验次数较多，小幅度肌电在任务停止后仍持续。(4)运动时颈侧区肌肉活动优于项、肩部肌肉活动，且颈、肩部肌电振幅在等长后撤时趋于最高。3.(1)11名健康受试者在不同姿势下进行最大幅度等长水平下颌运动。采集双侧颈外侧、颈部、肩部和背部的表面肌电信号，并同时记录颌力。(2)这些区域的肌电功率值取决于颌骨练习的方向(后拉和后拉；前推=前推，P&lt；0.0001)。(3)上述方向效应在下颈侧(2号电极)和背部(5号电极)显著(P&lt；0.0001)。(4)姿势对功率值的影响随下颌练习的方向而异(P&lt；0.0001)。热力学；也就是说，在直立位置观察到的最大值，而在仰卧位置观察到的最大值

1. As a pre-experimental study, discomfortableness in the head, neck, shoulder and back regions was observed in 23 healthy subjects. It was conformed that Unpleasant, Fatigate, Painful, Suffocative, Dyskinesthetic and Forocious sensations was able to be induced by loading of isometric horizontal jaw movement which implied functional relations between the jaw, head, neck and back muscles.2. (1) Eight healthy participants performed horizontal isometric jaw movements with maximum voluntary contractions of the jaw muscles until they could not tolerate the task. Electromyographic activities bilaterally recorded from the superior and inferior regions of the sternocleidomastoid muscle and the nuchal and shoulder regions of the trapezius muscle were observed.(2) In more than 94% of 32 trials, the amplitude of EMGs during the task were higher than those at rest, and in more than 78%, temporal changes in EMG burst were synchronized with the onset-offset of the exercise.(3) In more than 72% of al … More l trials, small amplitude EMG lasted after cessation of the task.(4) Muscle activities of the lateral cervical region during the exercise were superior to the activity of the nuchal and shoulder regions, and amplitude of EMGs in the neck and shoulder regions tended to be the highest during isometric retrusion.3.(1) Eleven Healthy Participants were made to perform isometric horizontal jaw movements with maximum voluntary efforts in various postures. Surface EMGs from the laterocervical, nucha, shoulder and back regions were bilaterally picked up, and simultaneously recorded with jaw force.(2) Electromyographic power value in these regions depended on the directions of the jaw exercises (posteriorly pull > posterolaterally pull > anteriorly push = anterolaterally push, P<0.0001).(3) The directional effects mentioned above were significantly obvious in the inferior laterocervical (Electrode No.2) and back (Electrode No.5) regions (P<0.0001).(4) The postural effects on the power value were varied with the directions of the jaw exercises (P<thermodynamics>0.03);i.e., the highest value during jaw pull was observed in an upright position, while that during jaw push was found in a supine position Less