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Anatomy Exam 2 > Nasal Cavity and Pterygopalatine fossa > Flashcards

Nasal Cavity and Pterygopalatine fossa Flashcards

1
Q

What are the three regions of the nose?

A

Nasal vestibules

Respiratory regions

olfactory regions

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2
Q

What bones make up the medial wall of the nasal cavity?

A
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3
Q

What makes up the roof of the nasal cavity?

A
  • Nasal
  • frontal
  • cribiform plate
  • sphenoid
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4
Q

What makes up the floor of the nasal cavity?

A
  • palatine
  • maxillary bones of the hard palate
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5
Q

What makes up the posterior boundary of the nasal cavity?

A

Chonana

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6
Q

What makes up the lateral wall of the nasal cavity?

A
  • nasal
  • lacrimal
  • maxillary
  • ethmoid
  • palatine
  • sphenoid
  • inferior concha
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7
Q

What is the purpose of the three conchae?

A
  • they increase the surface area in the nasal cavity
  • helps us to warm and moisten the air
  • the air twists through the recess underneath each concha like a turbine
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8
Q

What sinus is this?

A

Sphenoid sinus which drains into the sphenoethmoidal recess

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9
Q

What is this area?

A

Ehmoid bulla- middle ethmoid air cells

  • see little dots, the little ethmoid air cells
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10
Q

What is this area beneath the ethmoid bulla?

A
  • semilunar hiatus
  • frontal sinus
    • draining starts here then proceeds to the next two
  • ant ethmoid air cells
  • maxillary sinus
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11
Q

What meatus does the nasolacrimal duct drain into in the nasal cavity?

A

Inferior meatus

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12
Q

What is the clinical issue of this image?

A
  • Deviation of the nasal septum
    • causes:
      • birth injury
      • trauma (most common)
    • Deviation may be so severe that it contacts the lateral wall and impairs your breathing
  • Rhinitis
    • nasal mucosa become swollen and inflamed
    • occurs during upper respiratory infections or allergic reaction
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13
Q

What are the four paranasal sinuses?

A

frontal

ethmoid

sphenoid

maxillary

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14
Q

What happens if you have a lot of inflammation in the paranasal sinuses?

A
  • their drainage area is incredibly small
  • if you have a lot of inflammation of mucous membranes the spaces starts to close off
    • you get backed off
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15
Q

What nerve are the paranasal sinuses innervated by?

A

CN V

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16
Q

Why is the maxillary sinus not very effective at draining?

A

Because it drains superiorly

17
Q

Why cant you have a sinus infection under the age of 7?

A
  • because the sinuses arent really fully developed till the age of 7
18
Q

What is the clinical issue of infection in ethmoidal cells?

A
  • infection may break through the medial wall of the orbit
  • may cause blindness or optic neuritis
19
Q

What is a clinical issue with maxillary sinus?

A
  • openings are located superiorly
  • have to fill it alot to get it to drain
  • when you lay down it drains
20
Q

Describe the vasculature of the Nasal cavity

A
21
Q

where do your anterior nose bleeds come from?

A

kiesselbach area

  • an anastomsis of the nasal arteries
22
Q

Where do your posterior nose bleeds come from?

A

Spehnopalatine artery

  • drains in back of your mouth
  • very uncommon
23
Q

Where do the veins originating from opthalmic drain to?

A

Cavernous sinus

24
Q

What does the triangle of danger mean to the nasal cavity?

A
  • the veins from the nasal cavity can drain into the opthalmic vein which then drains into the cavernous sinus
    • whats right next door to the cavernous sinus?
      • THE BRAIN
25
Q

What are the four nerves that innervate the nasal cavity?

A
  • olfactory nerve
  • opthalamic V1
  • maxillary V2
  • Parasympathetic fibers from facial CN VII
26
Q

What comes out of the pterygopalatine fossa?

A
27
Q

What drains into the spenoethmoidal recess?

A

Sphenoid sinus

28
Q

What drains into the superior meatus?

A

Posterior ethmoid air cells

29
Q

What drains into the middle meatus-specifically the ethmoid bulla?

A
  • Middle ethmoid air cells
30
Q

What drains into the middle meatus- specifically the semilunar hiatus?

A
  • frontal sinus
  • anterior ethmoid air cells
  • maxillary sinus
31
Q

What drains into the inferior meatus?

A

Nasolacrimal duct

Anatomy Exam 2 (18 decks)

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