Nasal cavity Flashcards
What are the main cartilages in the nose?
Alar–within the wings
Lateral–inferior and lateral to the nasal bones
Septal–traveling down the tip of the nose
What are the contributory bones of the external nose?
Maxillary, frontal, nasal
Where is the vestibule of the nose?
Anterior to the inferior concha
Where is the antrum of the nose?
Anterior to the middle concha
Where is the opening of the maxillary sinus found?
Between the middle and inferior conchae in the semilunar hiatus
Where is the opening of the middle ethmoidal sinus found?
At the ethmoid bulla
Where is the opening of the nasolacrimal duct found?
Under the inferior concha
What is the choana?
It is the posterior aperature of the nasal cavity
How is the nasal cavity innervated?
The lateral wall receives the nasopalatine nerve and a branch of the anterior ethmoidal (V1)
The medial wall receives the greater and lesser palatine nerves
What is the parasympathetic supply to the nasal glands?
The parasympathetics from CN VII change roads at the geniculate ganglion and then travels thru the pterygopalatine canal as the greater petrosal and joins V2 nerves to the target glands
How is the external nose innervated?
Infraorbital nerve (V2) gets to lateral walls, branches of nasocilliary and supratrochlear travel down to the tip of the nose
What is the Kisselbach area?
A highly anastomotic region of the medial wall of the nose that is susceptible to epistaxis
What are the blood supplies to the nasal cavity?
The anterior and posterior ethmoidal from the ophthalmic; the sphenopalatine and greater palatine from the maxillary, the superior labial from the frontal
