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翼外肌的两个头应被看作互相拮抗的两个肌肉。下头收缩时降下颌,使下颌前伸,单侧活动时下颌偏向对侧。在这些活动中翼外肌上头肌电图是平静的。升下颌,特别是闭口末期、紧咬时,上头活动,此时下头肌电图是平静的。两个头在关节前面10mm结合之前各有自己的肌鞘。上头主要附着于关节盘,收缩时其方向是上、内、前,鉴于上头在解剖、形态、肌电图活动方面的特点,作者在1981年即建议称其为翼上肌(superior pterygoid muscle)。在本研究中,作者对35名病人记录了肌电图。10名是无关节功能紊乱史的自愿受试者,20名是颞颌关节功能紊乱有疼痛症状的
The two heads of the pterygoid muscle should be considered as two muscles that antagonize each other. Lower jaw lower jaw, so that the mandibular advancement, unilateral mandibular activity contralateral. The pterygium top electromyography is calm during these activities. Lifting the jaw, especially the closed end, when bite, the upper head activities, this time the EMG is calm. The two heads each have their own muscular sheath before binding 10 mm in front of the joint. The upper main attachment to the articular disc, when contracted its direction is on, before and after, in view of the top anatomical, morphological, EMG activity characteristics, the author suggested in 1981 that it was the pterygoid muscle (superior pterygoid muscle) . In the present study, the authors recorded electromyography on 35 patients. Ten were free volunteers with no history of joint dysfunction and 20 had painful symptoms of temporomandibular joint dysfunction