Question

what structure is highlighted?

a. facial a.
b. lingual a.
c. internal carotid a.
d. common carotid a.
e. posterior auricular a.

Explanation:

Identify the region

The image shows a deep dissection of the lateral head and neck. We are looking at the branches of the external carotid artery in the Anterior Neck Anatomy region.

Trace the main vessels

The common carotid artery bifurcates into the internal and external carotid arteries. The highlighted vessel (blue) arises anteriorly from the external carotid artery, just superior to the superior thyroid artery.

Analyze the highlighted loop

The highlighted artery forms a characteristic upward loop before running deep to the hyoglossus muscle to supply the tongue. This loop is highly characteristic of the lingual artery.

Compare with other options

• Facial a.: Arises superior to the lingual artery, often passing deep to the submandibular gland and over the mandible.
• Lingual a.: Arises opposite the tip of the greater cornu of the hyoid bone, looping upward and medially. This matches the highlighted structure.
• Internal carotid a.: Runs straight up without giving branches in the neck.
• Common carotid a.: The main trunk before bifurcation, located lower in the neck.
• Posterior auricular a.: Arises posteriorly, higher up near the ear.

Confirm the correct choice

The highlighted loop is the lingual artery, which corresponds to option B.

Answer:

• (A) Facial a.
• (B) Lingual a. (Correct answer)
• (C) Internal carotid a.
• (D) Common carotid a.
• (E) Posterior auricular a.