Superior Thyroid Artery
The Superior Thyroid Artery is usually the first branch of the external carotid artery. It supplies the superior pole of the thyroid gland. It anastomoses with its counterpart and the inferior thyroid artery. The superior thyroid artery is one of two main arteries supplying the thyroid gland.
The superior thyroid artery is related to the external laryngeal nerve, which supplies the cricothyroid muscle. Damage to the external laryngeal nerve results in an inability to tense the vocal folds.