Inferior Nasal Concha Flashcards

Study the inferior nasal concha's structure, articulations, mucosal covering, vascular supply, innervation, and role in nasal airflow.

Card 1 of 25Question

What is the inferior nasal concha?

A paired, curved facial bone projecting medially from the lateral wall of the nasal cavity.

In This Section

1. What is the inferior nasal concha?

A paired, curved facial bone projecting medially from the lateral wall of the nasal cavity.

2. Is the inferior nasal concha part of the ethmoid bone?

No. It is an independent facial bone, unlike the superior and middle nasal conchae.

3. Where is the inferior nasal concha located?

Along the lower portion of the lateral nasal wall, inferior to the middle nasal concha.

4. What is the general shape of the inferior nasal concha?

A thin, elongated, scroll-shaped bony plate.

5. What are the principal anatomical features of the inferior nasal concha?

Two surfaces, two borders, and anterior and posterior extremities.

6. Which surface of the inferior nasal concha faces the nasal septum?

The convex medial surface.

7. Which surface of the inferior nasal concha faces the lateral nasal wall?

The concave lateral surface.

8. Which border of the inferior nasal concha attaches to the lateral nasal wall?

The superior border.

9. Which border of the inferior nasal concha is free within the nasal cavity?

The inferior border.

10. What are the three processes of the inferior nasal concha?

The lacrimal, ethmoidal, and maxillary processes.

11. What is the function of the lacrimal process of the inferior nasal concha?

It contributes to the formation of the nasolacrimal canal.

12. Which ethmoid structure articulates with the ethmoidal process of the inferior nasal concha?

The uncinate process of the ethmoid bone.

13. What is the role of the maxillary process of the inferior nasal concha?

It projects inferiorly and contributes to narrowing the maxillary hiatus.

14. Which four bones articulate with the inferior nasal concha?

The maxilla, lacrimal, ethmoid, and palatine bones.

15. What is the inferior nasal meatus?

The passage between the inferior nasal concha and the floor of the nasal cavity.

16. Which duct opens into the inferior nasal meatus?

The nasolacrimal duct.

17. What type of epithelium predominantly covers the inferior nasal concha?

Pseudostratified ciliated columnar respiratory epithelium with goblet cells.

18. What vascular feature characterizes the mucosa of the inferior nasal concha?

A rich network of venous capacitance vessels capable of swelling and reducing nasal airway size.

19. What is the principal arterial supply to the posterior inferior nasal concha?

The posterior lateral nasal branches of the sphenopalatine artery.

20. Which artery contributes to the anterior blood supply of the inferior nasal concha?

The anterior ethmoidal artery, a branch of the ophthalmic artery.

21. Which nerve provides general sensory innervation to much of the posterior inferior nasal concha?

Posterior superior lateral nasal branches of the maxillary nerve (V2).

22. Which nerve supplies general sensation to the anterior region of the inferior nasal concha?

The anterior ethmoidal nerve, a branch of the nasociliary nerve (V1).

23. How does the inferior nasal concha contribute to normal respiration?

It increases mucosal surface area and helps warm, humidify, and filter inspired air.

24. What is the nasal cycle?

Alternating congestion and decongestion of nasal mucosal erectile tissue, particularly over the inferior conchae.

25. What is inferior turbinate hypertrophy?

Enlargement of the inferior nasal concha's mucosal tissues, sometimes with bony enlargement, that can obstruct nasal airflow.