HNS 4 Flashcards
Which bone of the skull are the superior and middle conchae a part of?
Ethmoid bone
What type of epithelial cells make up the epithelium of the nasal cavity?
Pseudostratified ciliated columnar epithelium
Which arteries supply the nasal cavity?
Internal and external carotid
What are the 4 paranasal sinuses? Which cranial nerve innervates them?
Frontal
Ethmoidal cells
Sphenoid
Maxillary
Trigeminal nerve (CN V)
Which paranasal sinuses are innervated by the ophthalmic nerve (CN V1)?
Frontal
Ethmoid cells
Sphenoid
Which paranasal sinuses are innervated by the maxillary nerve (CN V2)?
Ethmoid cells
Sphenoid
Maxillary
Where does the frontal sinus drain?
Infundibulum at front end of semilunar hiatus
Where do the ethmoidal cells drain? (Anterior, middle, posterior)
Anterior - infundibulum
Middle - ethmoidal bulla
Posterior - lateral wall of superior meatus
Where does the sphenoid sinus drain into?
Spheno-ethmoidal recess
Where does the maxillary sinus drain?
Middle of semilunar hiatus
Which nerve innervates the extraocular muscles of the eye? What are the two exceptions?
Oculomotor nerve (CN III)
Except lateral rectus and superior oblique
What innervates the lateral rectus muscle of the eye?
Abducens (CN VI)
What innervates the superior oblique muscle?
Trochlear (CN IV)
Which bone does the superior oblique muscle arise from (origin)?
Sphenoid bone
Which bone does the inferior oblique muscle arise from (origin)?
Maxilla (orbital surface)
