The oral cavity

Question 1

What is the vestibule?

Answer 1

Superficially: Space between the Lips and cheeks
Deeply: Space between teeth and gingivae

Question 2

Which nerve innervates the buccinator?

Answer 2

CN VII

Question 3

What does the orbiculares oris do?

Answer 3

Purses the lips

Question 4

What is the oropharangeal isthmus?

Answer 4

Opening to the oropharynx in the posterior aspect of the oral cavity

Question 5

What forms the hard palate?

Answer 5

• The palatine process of the maxilla

- The horizontal plane of the palatine bone

Question 6

What are the subdivisions of the palate?

Answer 6

Soft palate:
-Posterior

Hard palate:
-Hard anterior aspect

Question 7

What are the functions of the hard and soft palate?

Answer 7

Soft palate: separates the oral cavity from the nasopharynx

Hard palate: separates the oral cavity from the nasal passages

Question 8

Which are the muscles of the soft palate

Answer 8

Tensor veli palatini 
Levator veli palatini
Palatoglossus : palate to tongue 
Palatopharangeus: palate to pharynx 
Musculus uvulae: muscle of the uvula

Question 9

What are the muscles of the soft palate responsible for?

Answer 9

Responsible for elevating the palate: to seal off oral passage from the nasopharynx (when breathing or swallowing)
Responsible for depressing the palate: to seal off the oral passage from the nasal cavity (when breathing through the nose)

Question 10

which nerve innervates the muscles of the soft palate

Answer 10

• Pharangeal plexus via the vagus nerve

- Except for TV.P. which is innervated via V3