Oral and Nasal Cavities

Question 1

The narrow space between the lips and cheeks and teeth and gums is called….

Answer 1

The vestibule

Question 2

Where does the parotid duct open into the vestibule?

Answer 2

At the second upper molar tooth.

Question 3

What are the anterior and posterior boundaries of the oral cavity?

Answer 3

The teeth anteriorly and the tonsillar pillars posteriorly.

Question 4

What are the formal names of the two tonsillar pillars? What lies between them?

Answer 4

The palatine tonsils are between the palatoglossal and palatopharyngeal folds.

Question 5

What forms the roof and floor of the oral cavity?

Answer 5

Hard palate, tongue and sublingual mucosa.

Question 6

What two nerves innervate the oral cavity roof mucosa? Both are branches of?

Answer 6

Post 2/3 = greater palatine nerve
Ant 1/3 = nasopalatine nerve

Both branches of MAXILLARY (V2)

Question 7

The mucosa of the cheeks is innervated by…. which is a branch of………

Answer 7

The buccal nerve- branch of V3 MANDIBULAR

Question 8

The mucosa of the floor of the oral cavity is innervated by the _____________, a branch of ________.

Answer 8

The Lingual Nerve, branch of V3 Mandibular.

Question 9

The mucosa of the tonsillar pillars is innervated by what nerve?

Answer 9

Glossopharyngeal (CN IX)

Question 10

Where do the submandibular ducts empty?

Answer 10

IN the sublingual caruncles on either side of the frenulum.

Question 11

What lies under the sublingual folds?

Answer 11

The sublingual glands.

Question 12

What structures will you find underlying the tongue?

Answer 12

Lingual Nerve
Submandibular Duct
Deep Lingual Artery/ Vein
Sublingual Gland

Question 13

What divides the tongue into its anterior 2/3 and posterior 1/3? What physical structures are located there?

Answer 13

The sulcus terminals

Vallate papilla are located there

Question 14

What artery runs deep to the hyoglossus muscle?

Answer 14

The lingual artery

Question 15

What nerve does the chord tympani nerve hitchhike with and what does it innervate?

Answer 15

Hitchhikes on the Lingual nerve in the infra-temporal fossa and carries SA fibers to the anterior 2/3 of the tongue and PREGANGLIONIC PARASYMPATHETICS to the submandibular ganglion. They synapse with postganglionics there and innervate the submandibular and sublingual glands.

Question 16

Where do the preganglionic parasympathetic fibers within the chorda tympani (VII) nerve synapse?

Answer 16

with Postganglionic neurons in the submandibular ganglion.

Question 17

What nerve provides GSA and taste from the posterior 2/3 of the tongue?

Answer 17

Glossopharyngeal (CN IX)

Question 18

What nerve provides GSA and taste from mucosa on the epiglottic portion of the tongue?

Answer 18

Vagus (CN X)

Question 19

On a dried skull, what bones form the hard palate/floor of the nasal cavity?

Answer 19

The palatine process of the Maxilla and the horizontal process of the Palatine bones.

Question 20

What nerve runs in the incisive canal/ foramen?

Answer 20

The nasopalatine nerve.

Question 21

WHat muscle is located within the soft palate and forms the bulk of the uvula?

Answer 21

The musculus uvulae

Question 22

What runs in the space between the superior and middle constrictor muscles?

Answer 22

Glossopharyngeal nerve

Stylopharyngeus muscle

Question 23

What is the cartilage that covers the nasopharyngeal opening of the auditory tube?

Answer 23

Torus Tubarius

Question 24

What muscle attaches to the torus tubarius?

Answer 24

The salpingopharyngeus muscle

Question 25

Where are the pharyngeal tonsils (adenoids) located?

Answer 25

In the nasopharynx, Posterior to the salpingopharyngeus muscle within the pharyngeal recess.

Question 26

What are the two holes that lead from the nasal cavity into the oropharynx?

Answer 26

Choanae

Question 27

WHat muscle lies directly inferior to the torus tubarius?

Answer 27

The legator veli palatini muscle

Question 28

What is the origin of tensor veli palatini?

Answer 28

The scaphoid fossa at the base of the pterygoid plate.

Question 29

What nerve innervates the tensor veli palatini

Answer 29

V3

Question 30

All of the muscles of the soft palate are innervated by the ______________, except the tensor veli palatini.

Answer 30

Vagus nerve.

Question 31

Name the 4 paranasal sinuses.

Answer 31

Frontal Maxillary Ethmoidal (air cells) Sphenoid

Question 32

What two bones contribute to the nasal septum?

Answer 32

The perpendicular plate of the ethmoid bone, and the vomer. …. some contribution from septal cartilage.

Question 33

The bones of the hard palate form the floor of the ______________. Name them again.

Answer 33

Nasal Cavity. Palatine process of the Maxilla and horizontal plate of the palatine bone.

Question 34

What forms the roof of the nasal cavity?

Answer 34

The cribiform plate of the palatine bone

Question 35

The superior and middle conchae of the nasal cavity are parts of the __________ bone, and the inferior nasal conchae is its own bone.

Answer 35

Ethmoid bone

Question 36

WHat bones contribute to the lateral wall of the nasal cavity?

Answer 36

``` The Maxilla- frontal process Lacrimal bone Ethmoid bone (sup/middle conchae) Inf Nasal Conchae Palatine bone- vertical process Sphenoid bone- medial pterygoid plate ```

Question 37

THe sphenopalatine foramen is located where and connects what?

Answer 37

High on the posterior portion of the lateral nasal wall. It connects the ptyerygopalatine forra and the nasal cavity.

Question 38

What structures run-through the sphenopalatine fossa?

Answer 38

The nasopalatine nerve and sphenpalatine artery

Question 39

What recess is located superiorly to the superior nasal concha?

Answer 39

The shenoethmoidal recess

Question 40

Where is the bulla ethmoidalis? What else is located there?

Answer 40

Beneath the middle nasal concha. The hiatus semilunaris is there too.

Question 41

What sinus is located between the nasal cavity and the orbit?

Answer 41

Ethmoidal sinuses (ant, mid, post)

Question 42

The anterior air cells drain into...

Answer 42

The hiatus semilunaris

Question 43

The middle air cells drain into the….

Answer 43

bulla ethmoidalis

Question 44

The posterior air cells drain into the….

Answer 44

superior meatus

Question 45

The maxillary sinus drains where?

Answer 45

Through the hiatus semilunaris

Question 46

The sphenoid sinus drains where?

Answer 46

Into the sphenoethmoidal recess above the superior nasal concha.

Question 47

The frontal sinus drains where?

Answer 47

The hiatus semilunaris

Question 48

The space just inside the nostril is known as the ________.

Answer 48

Vestibule. Along with half the other spaces in the body called vestibules….

Question 49

The sphenopalatine foramen is a conduit between which cavities?

Answer 49

The nasal cavity and the pterygopalatine fossa.

Question 50

What structure go through the sphenopalatine foramen?

Answer 50

Nasopalatine nerve (V2- maxillary) and Sphenopalatine artery (branch of maxillary)

Question 51

What bone is the sphenoethmoidal recess in?

Answer 51

Palatine bone and sphenoid bone.

Question 52

What two nerves communicate within the incisive canal>

Answer 52

Greater Palatine (runs across superior surface of hard palate/floor of nasal cavity) and the nasopalatine nerve.

Question 53

Describe the course of the olfactory nerve.

Answer 53

The branches are on the nasal septum and conchae, and have a very short path through the cribiform plate of the ethmoid bone to the olfactory bulb.

Question 54

What canal extends from the pterygopalatine fossa along the lateral side of the palatine bone, and leads to the greater and lesser palatine foramina?

Answer 54

Greater Palatine canal

Question 55

What runs through the greater palatine canal?

Answer 55

Greater and lesser palatine nerves | Descending palatine artery (branch of maxillary)

Question 56

What is the main artery supplying the septum and the lateral walls of the nasal cavity?

Answer 56

The sphenopalatine artery. Posterior Septal branches (septum) Posterior Lateral Nasal Branches (lateral wall of nasal cavity)

Question 57

What artery courses with the nasopalatine nerve to the incisive canal?

Answer 57

A branch of the sphenopalatine artery- the posterior septal branch.