Lecture 12- Nasal and Oral Cavities

Question 1

What structure separates the anterior cranial fossa above the nasal cavity?

Answer 1

Cribiform plate of the ethmoid bone

Question 2

What is just lateral to the upper half of the nasal cavity? lower half?

Answer 2

upper- ethmoid air sinus

lower- maxillary air sinus

Question 3

What structure separates the nasal cavity from the oral cavity below?

Answer 3

hard palate (palatine process of the maxilla and horizontal plates of the palatine bone)

Question 4

What are the 3 components of the nasal septum?

Answer 4

1. Septal cartilage
2. Perpendicular (vertical) plate of the ethmoid bone
3. Vomer

Question 5

What bone provides the superior and middle concha? inferior concha?

Answer 5

Superior and middle concha are part of the ethmoid bone

Inferior concha is its own bone

Question 6

What are the four passages of the nasal cavity created by the superior, middle and inferior nasal concha (turbinates)?

Answer 6

1. Sphenoethmoidal reces
2. Superior meatus
3. Middle meatus
4. Inferior meatus

Question 7

Where does the sphenoid sinus drain?

Answer 7

into the sphenoethmoidal recess

Question 8

What drains into the hiatus semilunaris? Where is it located?

Answer 8

• found in middle meatus

- drains anterior ethmoidal sinus, frontal and maxillary sinuses

Question 9

Where do the maxillary sinuses drain?

Answer 9

into the hiatus semilunaris

Question 10

Where is the bulla ethmoidalis? What does it drain?

Answer 10

• swelling on the superior border of the hiatus semilunaris

- drains middle ethmoidal sinuses

Question 11

Where does the nasolacrimal duct drain?

Answer 11

into the inferior meatus of the nasal cavity

Question 12

Name 5 arterial branches that supply to nasal cavity.

Answer 12

• Anterior and posterior ethmoidal arteries
• lateral nasal branches of the facial artery
• greater palatine artery
• sphenopalatine artery

Question 13

What 4 bones house paranasal sinuses?

Answer 13

Frontal
Ethmoid
Sphenoid
Maxilla

Question 14

Where do the frontal sinuses drain?

Answer 14

semilunar hiatus (hiatus semilunaris) in the middle nasal meatus

Question 15

How do the anterior ethmoidal cells drain into the middle nasal meatus?

Answer 15

via the frontonasal duct

Question 16

How do the middle ethmoidal cells drain into the middle meatus?

Answer 16

through the ethmoidal bulla on the superior border of the semilunar hiatus

Question 17

How do the posterior ethmoidal cells drain?

Answer 17

directly into the superior meatus

Question 18

How do the sphenoid sinuses drain?

Answer 18

into the sphenoethmoidal recess

Question 19

What does the roof of the maxillary sinus form?

Answer 19

floor of the orbit

Question 20

What does the medial wall of the maxillary sinus form?

Answer 20

lateral wall of the nasal cavity

Question 21

What does the floor of the maxillary sinus form?

Answer 21

the alveolar part of the maxilla of the oral cavity

Question 22

Where do the maxillary sinuses drain?

Answer 22

into the maxillary ostium then into the middle nasal meatus through the semilunar hiatus

Question 23

What complication can occur during removal of palatal teeth?

Answer 23

displacement of root fragment into the maxillary sinus

Question 24

What is the name for the space between the teeth and the mucosal lining of the lips and cheeks?

Answer 24

vestibule

Question 25

What are the two attachments of the buccinator muscle?

Answer 25

pterygomandibular raphe and alveolar processes of the maxilla and mandible

Question 26

Where does the parotid duct open in the oral cavity?

Answer 26

opposite the crown of the 2nd molar

Question 27

What are the 2 bones that form the hard palate?

Answer 27

1. horizontal plate of the palatine bone | 2. palatine process of the maxilla

Question 28

What are the 3 pairs of foramina that open on the hard palate?

Answer 28

Greater palatine foramen Lesser palatine foramen Incisive Canal (fossa)

Question 29

Names the 5 muscles of the soft palate.

Answer 29

1. Levator veli palatini 2. Tensor veli palatini 3. Palatoglossus 4. Palatopharyngeus 5. Musculus uvulae

Question 30

Which muscle is responsible for elevating the posterior 1/3 of the tongue?

Answer 30

palatoglossus

Question 31

What muscle functions to elevate the pharynx and larynx?

Answer 31

palatopharyngeus

Question 32

Which is more anterior in the oral cavity the palatoglossus or the palatopharyngeus?

Answer 32

palatoglossus

Question 33

What are the 3 sets of tonsils?

Answer 33

palatine pharyngeal (single adenoid) lingual

Question 34

What is also called the adenoids?

Answer 34

pharyngeal tonsils

Question 35

What divides the tongue into the anterior 2/3 and the posterior 1/3?

Answer 35

sulcus terminalis

Question 36

What papillae types contain taste buds?

Answer 36

circumvallate papillae | fungiform papillae

Question 37

What taste budsc direct food?

Answer 37

filiform papillae

Question 38

What is the name for the midline fold of mucous membrane that runs on the under surface of the tongue?

Answer 38

lingual frenulum

Question 39

Where are the sublingual papilla located? What empties there?

Answer 39

located on either side of the lingual frenum | submandibular gland empties there

Question 40

What 2 muscles retract the tongue?

Answer 40

hyoglossus | styloglossus

Question 41

What muscle protrudes the tongue?

Answer 41

genioglossus

Question 42

What two muscles depress the tongue?

Answer 42

genioflossus | hyoglossus

Question 43

List the 4 intrinsic muscles of the tongue.

Answer 43

1. superior longitudinal 2. inferior longitiudinal 3. transvers 4. vertical

Question 44

What is the main artery of the tongue? Where does it branch from?

Answer 44

the lingual artery, a branch of the external carotid artery

Question 45

What are the 3 sub-branches of the lingual artery?

Answer 45

dorsal lingual artery deep lingual artery sublingual branch

Question 46

What provides the blood supply to the palatine tonsil?

Answer 46

dorsal lingual artery

Question 47

What artery supplies the body of the tongue?

Answer 47

deep lingual artery

Question 48

What artery supplies the floor of the mouth?

Answer 48

sublingual branch

Question 49

Name the 3 veins that drain the tongue?

Answer 49

deep lingual, sublingual, dorsal lingual

Question 50

What is the lymphatic drainage of the posterior 1/3 of the tongue?

Answer 50

Jugulo-omyhyoid group

Question 51

What is the lymph drainage of the tip of the tongue?

Answer 51

submental group

Question 52

What is the lymph drainage of the side of the tongue?

Answer 52

submandibular group

Question 53

What is the lymphatic drainage of the central part of the tongue?

Answer 53

jugulo-omohyoid group

Question 54

What nerve provide generation sensation to the anterior 2/3 of the tongue (GVA)?

Answer 54

CN V

Question 55

What nerve provides taste fibers to anterior 2/3 of the tongue (SA)?

Answer 55

Chorda tympani via the lingual nerve

Question 56

Which nerve provide sensation and taste (GVA and SA)) fibers to the posterior 1/3 of the tongue?

Answer 56

CN IX- Glossopharyngeal

Question 57

What two muscles form the floor of the mouth?

Answer 57

mylohyoid | geniohyoid

Question 58

What innervates the geniohyoid muscle?

Answer 58

C1

Question 59

Which duct crosses the lingual nerve in the mouth?

Answer 59

submandibular duct