Lecture 14 & 15: Oral Cavity

Question 1

Where is the tongue located?

Answer 1

Oral part (2/3rds) 
Pharyngeal part (1/3)

Question 2

Answer 2

Question 3

whats 3?

Answer 3

NAVL

Question 4

Answer 4

Question 5

Answer 5

Question 6

Answer 6

Question 7

Answer 7

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Describe the sub-lingual gland:

Answer 11

Question 12

Describe the hard palate:

Answer 12

Question 13

Answer 13

Question 14

Answer 14

Question 15

Answer 15

Question 16

Describe sensation of the mouth:

Answer 16

CN9 (Glossopharyngeal) posterior tongue

V3 manibular n. -> Lingual branch = General sensation (Also special sensation (taste) = cauda tympani, offshoot of CN7)

CN12 (Hypoglossal) Entire tongue (motor) i.e Intrinsic muscles, genioglossus, hyoglossus, styloglossus EXCEPTION: Palatoglossus (vagus nerve) [FOrms palatoglossus arch]

Question 17

What are the extrinsic muscles of the tongue?

Answer 17

Palatoglossus

Styloglossus

Hyoglossus

Genioglossus

Question 18

If laceration to the tongue results in pulsatile bleeding then what structure has been hit and where?

Answer 18

The laceration has passed the hypoglossal muscle has been passed, entering the second potential space filled with vessels (Lingual art.)

Question 19

Describe the location of the submandibular gand:

Answer 19

Superficial part its in the submandibular space… (the most inferior space of the two) it has the facial art. & vein, part of the hypoglossal nerve.

Deep part of submandibular gland sits in sublingual space (space under tongue), which also contains the sublingual gland + duct, sublingual art + vein, branches of the hypoglossal n. and glossopharyneal n.

Question 20

What innervates the soft palate?

Answer 20

All soft palate muscles are innervated by the vagus except: Muscular part of tensor vali palantini (V3 -> Medial tegway n.)

Question 21

What are the muscles of the soft palate?

Answer 21

Muscular part of tensor veli palantini

Levator veli palantini

Palatopharyngeus

Palatoglossus (from underside of aponeurosis)

Question 22

What three muscles are closely related to the submandibular gland?*

Answer 22

Mylohyoid

Hyoglossus

Genioglossus

Question 23

Damage to what nerve / its branches would result in ipsilateral weakness of the tongue?

Answer 23

Hypoglossal n.

Except vagus innervation of palatoglossus.

Question 24

Where does the sublingual and submandibular duct exit?

Answer 24

The sublingual caruncle near the frenumlum of the tongue

Question 25

What is the blood supply of the sublingual gland? what its innervation? (same as submandibular)

Answer 25

Sublingual artery and submental artery (branch of facial artery)

Veins are same

Chorda tympani innervates (CN7 branch) -> goes to submandibular ganglion

Question 26

What two muscles does the submandibular duct arise between?

Answer 26

Mylohyoid and hyoglossus muscle

Question 27

Describe the types of papillae found on the tongue:

Answer 27

Fungiform (general outer tongue)

Filiform (General central tongue)

Vallate papillae (the V shape found towards the back of the tongue before the oropharynx portion of the tongue)