1、LaryngologyReview Anatomy Physiologic functions:Respiration;Pronunciation;Protection;Swallowing Characteristics of the children Symptoms:1）hoarseness 2）inspiratory dyspnea 3）laryngeal stridor 4）pain of the larynx 5）hemoptysisLaryngeal muscles Extrinsic laryngeal muscles Up：geniohyoideus;digastricus;
2、mylohyoideus Down：sternothyreoideus;sternohyoideus;omohyoideus Intrinsic laryngeal muscles:abductor：posterior cricoarytenoid musle adductor：lateral cricoarytenoid musle,arytenoid musle tensor：cricothyroid musle relaxer：thyroarytenoid musle Main components of the vocal cords：thyroarytenoid musle,voca
3、l ligament,mucosa The lymphatic drainage of the larynx Supraglottic region：rich lymphatic vessels aryepiglottic folds anterior of sinus piriformisthyrohyoid membranecarotid bifuracation Infraglottic region：less lymphatic vessels across the cricothyroid membraneprelaryngeal,para-tracheal inferior deep cervical lymph nodes Glottic portion：rare lymphatic vessels Laryngeal nerve internus sensory nerve superior externus motor nerve(cricothyroid musle)vagus left longer recurrent right motor nerve(all the intrinsic laryngeal muscles except cricothyroid musle)normal
