H&N III: Nasal & Oral cavities

Question 1

What gives cartilage gives shape to the nostril?

Answer 1

Alar cartilage

Question 2

What are the 3 openings contained in the semilunar hiatus?

Answer 2

• Opening of the frontal sinus
• Opening of the anterior ethmoidal cells
• Opening of the maxillary sinus

Question 3

The opening of the middle ethmoidal cells are located where?

Answer 3

Ethmoidal bulla (bulla ethmoidalis)

Question 4

The opening of the posterior ethmoidal cells are located where?

Answer 4

Superior meatus

Question 5

The opening of the sphenoidal sinus is located where?

Answer 5

Sphenoethmoidal recess

Question 6

What innervates the mucosa of the maxillary sinus?

Answer 6

Infraorbital n

Question 7

The nasopalatine n and sphenopalatine a supply a portion of the oral mucosa that covers what?

Answer 7

Hard palate

Question 8

What are the boundaries of the maxillary sinus?

Answer 8

Roof: floor of the orbit
Floor: alveolar process of the maxilla

Question 9

What are the boundaries of the nasal cavity?

Answer 9

Roof: a narrow region bounded by the nasal septum & by 3 parts of 3 other bones (nasal bone, cribriform plate of the ethmoid bone, and sphenoid bone)
Floor: Palatine process of the maxilla and horizontal plate of the palatine bone.
Medial wall: nasal septum
Lateral wall: maxilla, lacrimal bone, ethmoid bone, inferior nasal concha, and perpendicular plate of the palatine bone.

Question 10

Define the oral vestibule:

Answer 10

oral vestibule: bounded externally by the lips and cheeks and internally by the teeth and gums.

Question 11

Define the oral cavity proper:

What is the largest content of the oral cavity?

Answer 11

oral cavity proper: the area between the alveolar arches and teeth.

The largest content of the oral cavity is the tongue.

Question 12

Geniohyoid m

Anterior attachment
Posterior attachment
Action

Answer 12

Anterior: inferior mental spine of the mandible
Posterior: body of the hyoid bone
Action: pulls the hyoid bone anteriorly

Question 13

Genioglossus m

Anterior attachment
Posterior attachment
Action
Innervation

Answer 13

Anterior: superior mental spine of the mandible
Posterior: Tongue
Action: protrudes the tongue
Innervation: Hypoglossal n (CN XII)

Question 14

Which nerve supplies the mucosa of the anterior 2/3 of the tongue with general sensation and taste fibers.

Answer 14

Lingual n

Question 15

Hyoglossus m

Inferior attachment
Superior attachment
Action

Answer 15

Inferior: body and greater horn of the hyoid bone
Superior: lateral side of the tongue
Action: depresses and retracts the tongue

Question 16

Styloglossus m

Proximal attachment:
Distal attachment
Action

Answer 16

Proximal: styloid process
Distal: Tongue
Action: retracts the tongue and draws it superiorly

Question 17

The lingual a changes its name to the deep lingual a at what location?

Answer 17

it changes its name once it passes medial to the hyoglossus m.

Question 18

The intrinsic muscles and the 3 extrinsic m (styloglossus, genioglossus and hyoglossus) are innervated by which cranial n?

Answer 18

CN XII (hypoglossol n)

Question 19

What innervates the mucosa of the maxillary sinus?

Answer 19

infraorbital n.