Fig. (1) Schematic diagram of the carotid triangle of the neck
illustrating the normal course of carotid arteries and origin of
superior thyroid artery (STA). Note that the superior thyroid artery
(STA) is arising from the external carotid artery (ECA) and
superior laryngeal artery (SLA) is a branch of superior thyroid
artery (STA). (CCA- Common carotid artery, ICA- Internal carotid
artery, TG- Thyroid gland, SCM- Sternocleidomastoid, PDPosterior
belly of digastric, ILN- Internal laryngeal nerve).