The left recurrent laryngeal nerve originates from the left vagus nerve as it passes over the arch of the aorta inferior to the left superior intercostal vein. It passes medially and posteriorly deep to the ligamentum arteriosum before curving inferior to the arch of the aorta. It then passes superiorly over the left main bronchus to ascend in the groove between the left side of the trachea and the anterior of the oesophagus.
Ascending in the tracheo-oesophageal groove, consecutively the recurrent laryngeal nerve is related to:
At the level of the thyroid gland, it passes beneath the inferior border of the muscle cricopharyngeus to run deep to it and superiorly towards the pharynx and larynx. Within the latter areas, the recurrent laryngeal nerve supplies the:
Last reviewed 01/2018