在延长发“e”音的时候,声带收缩并震动。同时用手指在颈前三角上部触诊可觉这种震动。颈前三角的界线是:前界为颈正中线,后界为胸锁乳突肌前缘,基底为下颌骨体下缘。检查者触诊这种震动并进行双侧对比。如果声带是正常的,则双侧 When you extend the “e” tone, the vocal cords contract and vibrate. At the same time with your fingers in the upper triangular anterior palpation can feel this vibration. The boundary of the anterior triangle is: the anterior boundary is the midline of the neck, the posterior border of the sternocleidomastoid muscle, and the basement is the inferior margin of the mandible. The examiner palpated this vibration and made bilateral comparisons. If the vocal cords are normal then both sides