Session 15 - Nasal and Oral Cavities and Nasal Sinuses

Question 1

What is the function of the Eustachian tube?

Answer 1

To equalise the air pressure on either side of the tympanic membrane.

This is important for optimal movement of the tympanic membrane

Question 2

Why is the maxillary sinus more prone to infection?

Answer 2

The opening of the maxillary sinus into the nasal cavity is at the top of the
sinus so it does not drain easily

Question 3

What is the nerve supply to the anterior 2/3 of the tongue?

Answer 3

General Sensation - Mandibular nerve
Taste Sensation - Facial nerve
Muscles - Hypoglossal Nerve

Question 4

Where do the ducts for the submandibular salivary glands open into the mouth?

Answer 4

Below the tongue

Question 5

Why may disease in the maxillary sinus cause numbness of the cheek?

Answer 5

The sensory nerve to the cheek passes in the roof of the maxillary sinus

Question 6

What are the attachments of the muscles of the tongue?

Answer 6

The hyoid bone

Question 7

What structure stops reflux of liquid into the nose during swallowing?
How does it do this?

Answer 7

Soft palate

The SP rises when we swallow and closes off the nasopharynx from the oropharynx