Lecture 9: Nasal Cavity and Pterygopalatine Fossa Flashcards

1
Q

What structures compose the bony part of external nose?

A
  • Nasal Bones
  • Frontal Part of Maxilla
  • Nasal Part of frontal bone and nasal spine
  • Bony part of nasal septum
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2
Q

What structures compose the Cartilaginous part of the nose?

A
  • 2 lateral cartilages
  • 2 alar cartilages (major and minor)
  • Septal Cartilage (nasal septum)
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3
Q

What structures make up nasal septum?

A
  • Perpendicular plate of ethmoid bone
  • Vomer
  • Septal Cartilage
  • Nasal Crests of Maxillary and Palantine Bones
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4
Q

Which conchae are part of the ethmoid bone and which one is independent?

A

Ethmoid Bone: Superior and middle nasal conchae

Independent: Inferior nasal concha

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5
Q

What is the nasal mucosa connected to?

A
  • Periostium of the bony parts of the nasal cavity
  • Perichondrium of cartilagenous nasal components
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6
Q

What is the area called that is lined with mucosa?

A
  • Inferior ⅔ of nose: Respiratory Area
  • Superior ⅓ of nose: Olfactory Area
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7
Q

What are the boundaries of the nasal cavity?

A
  • Roof: Frontal, Ethmoid, and Sphenoid Bone
  • Floor: Palantine Process of Maxilla and Horizontal plate of palantine bone
  • Medial Wall: Nasal Septum
  • Lateral Wall: Superior, Middle, and Inferior Nasal Conchae
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8
Q

What are the four nasal cavity passages?

A
  • Spheno-ethmoidal Recess
  • Superior Nasal Meatus
  • Middle Nasal Meatus
  • Inferior Nasal Meatus
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9
Q

What does the Spheno-ethmoidal Recess open into?

A

Sphenoid Sinus

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10
Q

What does the Superior Nasal Meatus open into?

A

Ethmoidal Sinuses

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11
Q

What does the Middle Nasal Meatus open into?

A

Frontal and Maxillay Sinus

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12
Q

What does Inferior Nasal Meatus the open into?

A

Nasolacrimal Duct

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13
Q

What arteries supply the nasal cavity?

A
  • Maxillary Artery
    • Sphenopalatine Artery
    • Greater Palantine Artery
  • Facial Artery
    • Superior Labial Artery
    • Lateral Nasal Branches
  • Ophthalmic Arteries
    • Anterior and Posterior Ethmoidal Arteries
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14
Q

What is Kiesselbach’s Area?

A

Capillary bed anastamosis between Maxillary A. and Facial A. branches in the nasal septum

Can cause epistaxis (nosebleeds)

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15
Q

What veins drain the nasal cavity?

A
  • Sphenopalatine Vein
  • Facial Vein
  • Ophthalmic Vein
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16
Q

Maxillary Sinus

What does it drain?

What is the arterial supply?

What is the innervation?

A
  • Drains: Maxillary ostium into middle meatus
  • Blood Supply: Superior Alveolar Branches (Maxillary A.) and Greater Palatine Artery
  • Innervation: Superior Alveolar Nerve
17
Q

Ethmoid Sinus

What does it drain?

What is the arterial supply?

What is the innervation?

A
  • Drains: Ethmoid air cells located between orbits
  • Blood Supply: Ethmoidal Artery from Ophthalmic Artery
    • From ECA
  • Innervation: Nasociliary Nerves (CN V1)
18
Q

Sphenoid Sinus

What does it drain?

What is the arterial supply?

What is the innervation?

A
  • Drains: Spheno-ethmoidal recess
  • Blood Supply: Posterior Ethmoidal Artery
  • Innervation: Posterior Ethmoidal Nerve
19
Q

Frontal Sinus

What does it drain?

What is the arterial supply?

What is the innervation?

A
  • Drains: Frontonasal Duct into middle meatus
  • Blood Supply: Supraorbital Artery and Anterior Ethmoidal Artery
  • Innervation: Supraorbital Nerve (CN V1)
20
Q

What nervous fibers arise from the superior cervical ganglion?

A

Postsynaptic sympathetics