Floor of the Mouth and Tongue

Question 1

What is the name of the deepest part of the cheek?

Answer 1

Buccal sulcus

Question 2

What is the name of the deepest part between tongue and teeth?

Answer 2

Lingual sulcus

Question 3

What is the name of the mucosa tightly adhered to the periosteum of the bone?

Answer 3

palatal mucoperiosteum

Question 4

What artery runs over the angle of the mandible?

Answer 4

facial artery

Question 5

What gland lies under the mylohyoid muscle?

Answer 5

superficial part of the submandibular gland

Question 6

What muscle lies posterior to the mylohyoid muscle?

Answer 6

Anterior belly of digastric

Question 7

What glands lay superior to the mylohyoid muscle?

Answer 7

• sublingual gland
• deep part of the submandibular gland

Question 8

What muscles lay superior to the mylohyoid muscle?

Answer 8

geniohyoid muscles

Question 9

What gland anterior to the ear?

Answer 9

parotid gland

Question 10

What supplies parasympathetic secretomotor to the submandibular and sublingual glands?

Answer 10

Chorda tympani

Question 11

What is the chorda tympani a branch of?

Answer 11

Trigeminal nerve - CN VII

Question 12

What are the 5 functions of the tongue?

Answer 12

• formation of food bolus
• pushing the food bolus to the back of the oral cavity ready to be swallowed
• keeping the mouth clean
• speech
• tasting and sensing food

Question 13

What is present in the posterior 1/3rd of the tongue?

Answer 13

lingual tonsil under mucosa

Question 14

What nerve supplies the posterior 1/3rd of tongue?

Answer 14

Glossopharyngeal - CN IX

Question 15

What nerve supplies the anterior 2/3rds of the tongue?

Answer 15

general sensation - CN V3 lingual nerve
taste sensation - CN VII via lingual nerve and chorda tympani

Question 16

What are the 4 types of papillae on the tongue?

Answer 16

1. vallate
2. foliate
3. filiform
4. fungiform

Question 17

What cranial nerve lies between the internal carotid artery and internal jugular vein?

Answer 17

Hypoglossal nerve - CN XII

Question 18

When does the hypoglossal nerve pass to the submandibular region?

Answer 18

after passing deep to the posterior belly of the digastric muscle

Question 19

What does the hypoglossal nerve pass lateral to?

Answer 19

Hypoglossal muscle

Question 20

What are the groups of the striated muscles of the tongue?

Answer 20

intrinsic and extrinsic

Question 21

What is the function of intrinsic tongue muscles?

Answer 21

alter shape of tongue

Question 22

What is the function of the longitudinal muscles of the tongue?

Answer 22

make tongue short and thick

Question 23

What is the function of the transverse and vertical muscles of the tongue?

Answer 23

make tongue long and narrow

Question 24

What forms the palatine aponeurosis?

Answer 24

tendons of tensor palati muscles

Question 25

What are the intrinsic tongue muscles?

Answer 25

• styloglossus
• hyoglossus
• genioglossus
• palatoglossus

Question 26

What are the intrinsic tongue muscles supplied by?

Answer 26

Hypoglossal nerve - CN XII EXCEPT palatoglossal (CN X)

Question 27

What are the 4 extrinsic muscles of the tongue?

Answer 27

• genioglossus
• parts of lingual septum
• geniohyoid
• mylohyoid

Question 28

What are the 4 extrinsic muscles of the tongue?

Answer 28

• genioglossus
• parts of lingual septum
• geniohyoid
• mylohyoid

Question 29

How would you clinically test the hypoglossal nerve CN XII?

Answer 29

Ask patient to stick tongue straight out.
If both nerves are normal, the tongue should stay straight.
If one is damaged the tongue tips towards the side of injured nerve.