论文部分内容阅读
鼓膜张肌呈纺锤形,长约20mm,起始于咽鼓管软骨部,经鼓膜张肌半管,肌腱绕匙突呈90度弯曲附着于槌骨颈。有人认为,它与腭帆张肌相连接,故与咽鼓管功能有某种密切的关系。其神经支配除三叉神经下颌支外,尚有鼓室神经丛参与。其声反射径路,系从耳蜗至蜗神经腹核为第一神经元,然后至同侧和对侧的内侧上橄榄核为第二神经元,再由该核至三叉神经运动核的外腹侧部为第三神经元。至于非声反射的径路目前尚不明瞭。声刺激所诱发的反射,通过声阻抗、外耳道压力和气流流量及肌电图等方法测定,多数学者认为有以下特点:①声诱发的鼓膜张肌反射不
Tympanic membrane muscle was spindle-shaped, about 20mm, beginning in the eustachian tube cartilage, the tympanic membrane half muscle, tendon around the spoon spine 90 degree bend attached to the malocclusal neck. Some people think that it is connected with the palatal fan, so with eustachian tube function has some kind of close relationship. In addition to its innervation of the trigeminal mandibular branch, there are tympanic nerve plexus involvement. The acoustic reflex path, from the cochlear to the cochlear nucleus as the first neuron, and then to the ipsilateral and contralateral medial olivary nucleus as the second neuron, and then from the nucleus to the trigeminal motor nucleus of the ventral side Ministry for the third neuron. As for the non-acoustic reflection of the path is not yet clear. Acoustic stimuli induced reflex, through the acoustic impedance, external auditory canal pressure and air flow and electromyography and other methods, most scholars believe that the following characteristics: ① acoustic evoked tympanic membrane muscle reflex is not