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以14只新泽西白兔作实验,10只在喉上神经以上切断右侧迷走神经,切除2cm,并将残端埋起,以预防再生;经口行喉镜证实右侧声带不能活动。4只兔行内窥镜、组织学及肌电图检查以作对照。在1～6月后再观察环杓后肌、环甲肌及声带情况。结果发现对照兔在迷走神经切除前,呼吸时双侧环甲肌有强的作用肌电图。喉上神经切除,环甲肌仍有弱的肌电反应,是由双侧神经的支配结果。在颅底切断迷走神经,同侧环甲肌肌电作用虽然明显减弱,但不消失。只有当双侧高位迷走神经切断,环甲肌作用电位消失。观察环杓后肌,将
Fourteen New Jersey white rabbits were used for the experiment. Ten of the right vagus nerves were excised above the laryngeal nerve, 2 cm excision was performed, and the stump was buried to prevent regeneration. The laryngoscope confirmed that the right vocal cord could not move. 4 rabbits endoscopy, histology and EMG examination as a control. After 1 to 6 months and then observe the ring after the crab, cricothyroid and vocal cords. The results showed that the control rabbits had a strong effect of EMG on the bilateral circumflex muscle during respiration before vagotomy. Laryngeal nerve resection, there is still a weak myocutaneous myoelectrical response, is dominated by bilateral nerves results. In the base of the skull to cut off the vagus nerve, the ipsilateral ring muscle myoelectricity was significantly weakened, but did not disappear. Only when the bilateral high vagus nerve cut off, the role of ring muscle disappeared. Observing the crab after the muscle, will