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DHBS 301 > Nasal Cavity and Paranasal Sinuses > Flashcards

Nasal Cavity and Paranasal Sinuses Flashcards

1
Q

External nares function

A

Connect nasal cavity to the environment

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2
Q

How is the nose supported?

A
  • Nasal bones
  • Fleshy cartilaginous network
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3
Q

What lines the vestibule of the nose?

A

Hairs called vibrissae

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4
Q

Anterior nasal cavity boundary

A

External nares

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5
Q

Posterior nasal cavity boundary

A

Internal nares

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6
Q

Superior nasal cavity boundary

A
  • Cribriform plate of ethmoid
  • Body of sphenoid
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7
Q

Inferior nasal cavity boundary

A

Superior aspect of the hard palate

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8
Q

Medial nasal cavity boundary

A

Midline nasal septum

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9
Q

Lateral nasal cavity boundary

A

Nail, maxilla, ethmoid, palatine, lacrimal, and conchae

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10
Q

What bones form the hard palate?

A

Maxilla and palatine

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11
Q

The nasal cavity is continuous with the…

A

Nasopharynx through the internal nares

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12
Q

Nasal septum divides…

A

The nasal cavity into left and right portions

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13
Q

What forms the nasal septum?

A
  • Septal cartilage
  • Vomer
  • Perpendicular plate of ethmoid
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14
Q

Boney projections of the lateral nasal wall are called

A

Conchae

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15
Q

Conchae are covered by…

A

Highly vascularized mucosa

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16
Q

Conchae function

A
  • Humidify air
  • Warm air
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17
Q

What bone is the superior concha apart of?

A

Ethmoid

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18
Q

What are meatuses?

A

Spaces inferior and lateral to the conchae

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19
Q

What does the middle meatus have?

A
  • Ethmoidal bull
  • Hiatus semilunaris
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20
Q

Where is the spenoethmoidal recess located?

A

Above superior concha

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21
Q

Where are the ostia located? What are they?

A
  • Nasal meatuses
  • Openings for communication with paranasal sinuses
22
Q

The middle meatus communicates with which paranasal sinuses?

A

Maxillary sinus, ethmoid sinus, and frontal nasal duct

23
Q

Respiratory mucosa function

A

Warm and humidifies air

24
Q

Olfactory mucosa function

A

Mediates sense of smell

25
Q

What increases the surface area within the nasal cavity?

A

Concha

26
Q

Do the concha and meatuses speeds up or slows down the flow of air?

A

Slows down

27
Q

What does the olfactory mucosa contain?

A

Olfactory receptor neurons that mediate sense of smell

28
Q

Where do bundles of olfactory receptor neuron axons pass through?

A

Cribiform plate of the ethmoid bone

29
Q

What innervates the nasal cavity?

A
  • CN I
  • CN V1
  • CN V2
30
Q

What part of the nasal cavity does CN V1 innervate for general sensory?

A

Superior aspect

31
Q

What part of the nasal cavity does CN V2 innervate for general sensory?

A

Inferior aspect

32
Q

What nerve goes through the incisive canal?

A

Nasopalatine nerve

33
Q

What does the nasopalatine innervate? Is it sensory or motor?

A

Sensory innervation of anterior part of hard palate, directly behind maxillary incisors and canines

34
Q

What provides arterial supply to the nasal cavity?

A
  • Ophthalmic artery
  • Maxillary artery
  • Facial artery
35
Q

Where is there an anastomosis in the nasal region?

A

Between the nasopalatine and greater palatine arteries in the incisive canal

36
Q

What does the sphenoethmoidal recess communicate with?

A

Sphenoid sinus

37
Q

What does the superior meatus communicate with?

A

Posterior ethmoidal cells

38
Q

What does the inferior meatus communicate with

A

Nasolacrimal canal

39
Q

What does the middle meatus communicate with?

A
  • Maxillary sinus
  • Frontal sinus
  • Ethmoid
40
Q

Paranasal sinuses function

A
  • Decrease weight of skill
  • Warm and humidify air
  • Serve as chambers for sound resonance
41
Q

What bone Is the ethmoidal sinus in?

A

Ethmoid bone

41
Q

What bone is the frontal sinus in?

A

Frontal bone

42
Q

Where is the hiatus semilunaris located?

A

Middle nasal concha

43
Q

What structure is the sphenoid sinus located near?

A

Pituitary gland

44
Q

What is the largest paranasal sinus?

A

Maxillary sinus

45
Q

What structure is the maxillary sinus near

A

Maxillary premolars and molars

46
Q

Why is the maxillary sinus hard to drain?

A

Opening is located near the roof of the sinus

47
Q

What structures communicate to the middle meatus through the hiatus semilunaris?

A
  • Anterior ethmoid cells of ethmoidal sinus
  • Maxillary sinus
  • Frontonasal duct of frontal sinus
48
Q

Sinusitis

A

Infection of sinuses

49
Q

What roots project into the maxillary sinus?

A

Maxillary molars

50
Q

What mediates sensation to the maxillary teeth?

A

CN V2

51
Q

Where does CN V2 go through? Is it sensory or motor innervation?

A
  • Maxillary sinus
  • Sensory

DHBS 301 (21 decks)

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