Nasal Cavity Flashcards

1
Q

Location of the Maxillary sinus?

A

Within the body of each maxilla, this pyramidally shaped sinus lies beneath the orbit.

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2
Q

Innervation of the ethmoid sinuses?

A

They are supplied by the anterior & posterior branches of the Nasociliary Nerve (V1).

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3
Q

Innervation of the frontal sinuses?

A

It is innervated by the supraorbital nerves (V1).

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4
Q

Where is the Sphenoethmoidal recess and what does it drain?

A

Sphenoethmoidal recess: region above superior concha - sphenoidal sinus.

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5
Q

Where is the Superior meatus and what does it drain?

A

Superior meatus: beneath superior concha - posterior ethmoidal air cells.

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6
Q

Where is the middle meatus and what are its components?

A

Middle meatus: beneath middle concha and contains a fissure called the semilunar hiatus.

The ethmoidal bulla is a bulge which helps to form the roof of the hiatus.

The unciform (uncinate) process helps to form the sharp floor of the hiatus.

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7
Q

What structures drain into the semilunar hiatus?

A

Frontal sinus - through the frontonasal duct (to the infundibulum).

Anterior ethmoidal air cells.

Maxillary sinus - this sinus connects to the middle meatus very close to the sinus’ roof.

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8
Q

What structures drain into the ethmoidal bulla?

A

middle ethmoidal air cells

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9
Q

What is the blood supply of the lateral wall of the nasal cavity?

A

Anterior and posterior ethmoidal arties (branches of the ophthalmic artery)

Lateral nasal branches (of the facial artery)

Sphenopalatine artery (Branch of maxillary artery)

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10
Q

What is the blood supply of the lateral wall of the nasal septum?

A

Anterior and Posterior ethmoidal arteries

Superior labial artery (Branch of facial artery)

sphenopalatine branches

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11
Q

What is Kiesselbach’s area?

A

Kiesselbach’s area is located in the anterior part of the nasal septum, in a location where many of the arteries supplying the septum anastomose.

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12
Q

What is epitaxis?

A

A nose bleed, which is relatively common because of the rich blood supply to nasal mucosa.

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13
Q

Air enters the nasal cavity through the ___________, and exits into the nasopharynx through the ___________.

A

Air enters the nasal cavity anteriorly through the nares, and exits posteriorly into the nasopharynx through the choanae.

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14
Q

What are the 3 regions of the nose?

A

Vestibule - lies within the flared portion of the nose and often contains hair follicles

Respiratory region - largest part of the nasal cavity which contains the conchae.

Olfactory region - superior-most top of the nasal cavity that contains the olfactory epithelium necessary for the sense of smell.

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