Nose, Nasal Cavity and Paranasal Sinuses

Question 1

nasal cavity extends from nostrils or anterior ______ in front to choanae or posterior _____ behind

Answer 1

nares, nares

Question 2

Relations of the nasal cavity:

Superiorly: fr__ntal and sph___noidal sinus, an__ior and mi__dle cranial fossa,

Inferiorly: separated from oral cavity by h__ palate

Posteriorly: it communicates with na____rynx, which may be regarded as back portion of nasal cavity

Laterally: face in front &, further back, orbit, maxillary & eth__dal sinuses

Answer 2

1. frontal and sphenoidal, anterior and middle
2. hard
3. nasopharynx
4. ethmoidal

Question 3

Relations of the nasal cavity:

Answer 3

Superiorly: frontal sinus, anterior cranial fossa, sphenoidal sinus & middle cranial fossa

Inferiorly: separated from oral cavity by hard palate

Posteriorly: it communicates with nasopharynx, which may be regarded as back portion of nasal cavity

Laterally: face in front &, further back, orbit, maxillary & ethmoidal sinuses

Question 4

The piriform aperture is bounded:

1. Above: ___________
2. laterally & below : ____________

Answer 4

1. nasal bones

2. maxillae

Question 5

The nasal cavity is divided into right & left halves by __________

NB: Each half has a roof, a floor, and medial and lateral walls

Answer 5

nasal septum

Question 6

Roof of the Nasal Cavity - formed from front-back wards by:

Answer 6

Nasal cartilages,
nasal bone, frontal bone, cribriform plate of ethmoid & body of sphenoid, which is partly covered by vomer & palatine bone

Question 7

Floor of the Nasal Cavity is formed by:

Answer 7

palatine process of maxilla in front and by horizontal plate of palatine bone behind

Question 8

Medial wall or Nasal septum of the nasal cavity is formed by:

Answer 8

septal cartilage, perpendicular plate of ethmoid & the vomer

Question 9

Lateral wall of the nasal cavity is formed by:

Answer 9

nasal bone, maxilla, lacrimal bone, ethmoid bone, inferior nasal concha, palatine bone (perpendicular plate) & sphenoid bone (medial pterygoid plate)

Question 10

Lateral wall of the nasal cavity is characterized by:

Answer 10

characterized by medial projection of three nasal conchae & their underlying meatuses

Question 11

Lateral wall of the nasal cavity is characterized by:

characterized by medial projection of three nasal conchae & their underlying ______

Answer 11

meatuses

Question 12

the three meatuses communicate medially to form _____________

Answer 12

common nasal meatus

Question 13

small space above & behind the superior concha is termed ______________ recess & receives the opening of sphenoidal sinus

Answer 13

spheno-ethmoidal recess

Question 14

The inferior meatus, between the inferior concha and the bony palate receives the termination of the ___________

Answer 14

nasolacrimal duct

Question 15

The_____________ is a separate bone that is attached to lower part of lateral wall of nasal cavity on each side

Answer 15

inferior nasal concha

Question 16

The nerves of ordinary sensation are derived from _______ divisions of trigeminal nerve (ophthalmic & maxillary nerves)

Answer 16

1st two

Question 17

Cartilage of the nose:

Answer 17

Cartilage of the nose

a. Septal cartilage - forms front part of nasal septum
b. Greater alar cartilage- surrounds nostrils & is important for shape of nostrils
c. Lesser alar cartilage- found in alar of nose
d. Lateral nasal cartilage - found above septal cartilage on both sides and connected to both osseous and cartilaginous parts of nasal septum
e. Accessory nasal cartilage - this may be found in the ala of nose. These cartilages reduce possibility of breakage of nose

Question 18

_____ or nasal bleeding, has been reported to occur in up to 60 percent of general population

Answer 18

Epistaxis,

Question 19

The rich vascular supply of nose originates from

1. ethmoid branches of Internal _____ arteries
2. Fa_al artery
3. Internal maxillary divisions of external carotid arteries

Answer 19

1. Internal carotid arteries
2. Facial artery
3. Internal maxillary divisions of external carotid arteries

Question 20

__________ are cavities found within maxilla, frontal, sphenoid & ethmoidal bones

Answer 20

Paranasal sinuses (Air sinuses)

Question 21

Paranasal sinuses (Air sinuses) are innervated by branches of ________ & _________ nerves

Answer 21

ophthalmic & maxillary nerves

Question 22

The Paranasal sinuses all drain, directly or indirectly into ______ cavity

Answer 22

nasal cavity

Question 23

_____________ is the largest of all paranasal sinuses

NB: is situated in body of maxilla
It is pyramidal in shaped

Answer 23

Maxillary sinus

Question 24

The maxillary sinus has one or more openings that drain into:

1. mi__le nasal meatus via the hi__us semilunaris

Answer 24

middle, hiatus

Question 25

________________ are composed of numerous small cavities (4 -17 on each side) in ethmoidal labyrinth, between orbit & nasal cavity= ethmoidal cells

Answer 25

Ethmoidal sinus

Question 26

The middle group of ethmoidal cells also called _______ sinuses, which are usually three in number, produce a rounded swelling called _________ bulla on the lateral wall of the middle nasal meatus

Answer 26

bulbar sinuses, ethmoidal bulla

Question 27

Frontal sinus may be regarded as an anterior ethmoidal cell that has invaded _____________ after birth

Answer 27

frontal bone

Question 28

The frontal sinus opens in to _______ nasal meatus directly or by means of a passage, fro__onasal duct, at one or two sites

Answer 28

middle nasal meatus, frontonasal duct

Question 29

The frontal sinus opens in to _______ nasal meatus

Answer 29

middle nasal meatus

Question 30

The nerve supply of the Frontal sinus is the su___orbital nerve

Answer 30

supraorbital nerve

Question 31

The Sphenoidal sinus opens into s___thmoidal recess of nasal cavity

Answer 31

sphenoethmoidal recess

Question 32

The sphenoidal sinus is supplied by the _______ nerve

Answer 32

Maxillary nerve

Question 33

BORDERS OF THE SPHENOIDAL SINUS 1. Anterior wall: sph__oidal concha 2. Posteriorly =related to p_ns & b__ilar artery 3. Superiorly= to optic chiasma, optic nerves & hyp__hysis cerebri, anteriorly 4. Inferiorly= to nasal cavity & nas__harynx 5. Laterally= to the optic nerve, cav__nous sinus & internal carotid artery & ophthalmic & maxillary nerves

Answer 33

1. sphenoidal concha 2. pons & basilar 3. hypophysis cerebri, 4. nasopharynx 5. cavernous sinus

Question 34

BORDERS OF THE SPHENOIDAL SINUS

Answer 34

1. Anterior wall: sphenoidal concha 2. Posteriorly =related to pons & basilar artery 3. Superiorly= to optic chiasma, optic nerves & hypophysis cerebri, anteriorly 4. Inferiorly= to nasal cavity & nasopharynx 5. Laterally= to the optic nerve, cavernous sinus & internal carotid artery & ophthalmic & maxillary nerves