External Carotid Artery Flashcards

Explore the external carotid artery's cervical course, eight major branches, anatomical relationships, blood supply, and clinical landmarks.

Card 1 of 30Question

Where does the external carotid artery originate?

At the bifurcation of the common carotid artery, usually near the superior border of the thyroid cartilage at C4.

In This Section

1. Where does the external carotid artery originate?

At the bifurcation of the common carotid artery, usually near the superior border of the thyroid cartilage at C4.

2. What is the principal distribution of the external carotid artery?

The extracranial structures of the head and neck, including the face, scalp, tongue, pharynx, and thyroid gland.

3. What is the initial position of the external carotid artery relative to the internal carotid artery?

It usually begins anteromedial to the internal carotid artery.

4. Through which cervical triangle does the proximal external carotid artery ascend?

The carotid triangle of the anterior neck.

5. What is the course of the external carotid artery in the upper neck?

It ascends deep to the posterior belly of digastric and stylohyoid before entering the parotid gland.

6. Where does the external carotid artery terminate?

Within the parotid gland, posterior to the neck of the mandible.

7. What are the two terminal branches of the external carotid artery?

The maxillary artery and superficial temporal artery.

8. How many major branches does the external carotid artery typically have?

Eight, including six collateral branches and two terminal branches.

9. Which three branches typically arise from the anterior surface of the external carotid artery?

The superior thyroid, lingual, and facial arteries.

10. Which two branches typically arise from the posterior surface of the external carotid artery?

The occipital and posterior auricular arteries.

11. Which branch typically arises from the medial surface of the external carotid artery?

The ascending pharyngeal artery.

12. Which artery is usually the first anterior branch of the external carotid artery?

The superior thyroid artery.

13. What structures receive blood from the superior thyroid artery?

The thyroid gland, adjacent infrahyoid muscles, and portions of the larynx.

14. Which nerve is closely associated with the superior thyroid artery near the thyroid gland?

The external branch of the superior laryngeal nerve.

15. Which external carotid branch supplies most of the tongue?

The lingual artery.

16. What is the anatomical relationship of the lingual artery to the hyoglossus muscle?

The lingual artery passes deep to the hyoglossus muscle.

17. Which external carotid branch provides the principal arterial supply to the superficial face?

The facial artery.

18. Where does the facial artery cross the inferior border of the mandible?

Immediately anterior to the masseter muscle.

19. Which small external carotid branch supplies the pharynx and contributes to the cranial dura?

The ascending pharyngeal artery.

20. Which external carotid branch supplies much of the posterior scalp?

The occipital artery.

21. What is the relationship of the hypoglossal nerve to the occipital artery?

The hypoglossal nerve commonly hooks around the origin of the occipital artery as it crosses the carotid region.

22. Which external carotid branch supplies the region behind the auricle?

The posterior auricular artery.

23. Which terminal branch of the external carotid artery supplies deep facial structures?

The maxillary artery, which supplies the infratemporal region, jaws, nasal cavity, and other deep structures.

24. Which maxillary artery branch enters the cranial cavity through the foramen spinosum?

The middle meningeal artery.

25. Which terminal branch of the external carotid artery ascends anterior to the ear?

The superficial temporal artery.

26. Which nerve is closely associated with the superficial temporal artery in the temporal region?

The auriculotemporal nerve, a branch of the mandibular division of the trigeminal nerve.

27. What is the arrangement of the facial nerve, retromandibular vein, and external carotid artery within the parotid gland?

From superficial to deep: facial nerve, retromandibular vein, and external carotid artery.

28. How does the branching pattern distinguish the external carotid artery from the internal carotid artery in the neck?

The external carotid artery normally gives off cervical branches, while the internal carotid artery normally does not.

29. Which branches of the external and internal carotid systems form an anastomosis near the medial canthus?

The angular artery of the facial artery and the dorsal nasal artery of the ophthalmic artery.

30. Why is the external carotid artery important in the management of severe head and neck hemorrhage?

Its branches supply many extracranial structures and may be selectively embolized or surgically ligated to control bleeding.