FUNCTIONAL RELATIONS BETWEEN JAW, HEAD, NECK AND BACK MUSCLES

1.作为实验前研究，在23名健康受试者中观察到头部、颈部、肩部和背部区域的不适。研究结果表明：1.等长水平颌运动负荷能诱发不愉快、恶心、疼痛、窒息、感觉障碍和暴力等感觉，反映了颌、头、颈、背肌之间的功能关系. (1)八名健康的参与者进行水平等距下颌运动，下颌肌肉的最大自愿收缩，直到他们不能忍受的任务。记录胸锁乳突肌上级和下级区域以及肩颈肌和肩部区域的双侧肌电活动。(2)在32个试验中，超过94%的EMG在任务期间的振幅高于在休息时的振幅，并且超过78%的EMG爆发的时间变化与运动的开始-结束同步。(3)在超过72%的铝 关于我们 1次试验中，小振幅肌电图在任务停止后持续。(4)颈外侧肌群在运动过程中的活动度上级优于项、肩肌群，且颈、肩肌群的振幅在等长收缩时趋于最高. (1)11名健康受试者在各种姿势下进行等长水平下颌运动，最大限度地自愿努力。双侧采集颈侧、项部、肩部和背部的表面肌电图，并与颌力同步记录。(2)这些区域的肌电功率值取决于下颌运动的方向（后拉>后外侧拉>前推=前外侧推，P <0.0001）。(3)上述方向性效应在颈下外侧（2号电极）和背部（5号电极）区域均非常明显（P <0.0001）。(4)姿势对力量值的影响随下颌运动方向的不同而不同（P0.03）;即，<thermodynamics>最高值在下颌拉观察到在一个直立的位置，而在下颌推发现在仰卧位

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