The superior laryngeal nerve is a branch of the vagus nerveit arises from the middle of the inferior ganglion of vagus nerve and in its course receives a branch from the superior cervical ganglion of the sympathetic nervous system the cricothyroid muscles are innervated by the superior laryngeal nerve all other intrinsic laryngeal muscles are innervated by the recurrent laryngeal nerve. The right recurrent laryngeal nerve divides from the main vagus nerve at the level of the right subclavian artery to enter the superior mediastinum the right recurrent laryngeal nerve then dips posteriorly around the subclavian artery to ascend in the groove between the esophagus and trachea. The superior laryngeal nerve sln and its functions although physiologically important may still be one of the least understood in the head and neck region most of the research and clinical interest in the field of neurolaryngology is focused on the recurrent laryngeal nerve rln. This textbook is designed to deliver a comprehensive up to date review of all aspects of recurrent laryngeal nerve and superior laryngeal nerve anatomy including surgically important anatomy key strategic surgical maneuvers state of the art neural monitoring preservation of recurrent and superior laryngeal nerves during thyroidectomy and surgical management. The recurrent laryngeal nerve receives sensory innervation from the trachea esophagus and pyriform sinus before it enters the larynx deep to the inferior constrictor muscle and posterior to the cricothyroid articulation the inferior thyroid artery and its branch inferior laryngeal artery are responsible for supplying the recurrent laryngeal nerve with blood
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