Reg Ana 2 Week 6: Nose, Nasal Cavity and Sinuses

Does the vestibule have mucosa

No

What forms the superior and middle nasal conchae

The ethmoid bone

What forms the inferior nasal conchae

The maxilla

Meatus def and function

Space between each concha (sup mid and inf)

-Function: drainage of sinuses and nasolacrimal duct occurs here

Roof of nasal cavity

Ant cranial fossa

Floor of nasal cavity

Hard palate

Why do babies rarely experience sinus problems

Not all sinuses have developed yet

What sinuses are present at birth (2)

Maxillary and ethmoid

First radiologic evidence of maxillary sinus

4-5 months after birth

First radiologic evidence of ethmoid sinus

1 year after birth

Which sinuses develop after birth

Frontal (6 years) and sphenoid (4 years)

Infundibulum drains which sinuses (2)

Frontal and anterior ethmoid air cells

Ethmoid bulla drains which sinuses (1)

Middle ethmoid air cells

Hiatus semilunaris drains which sinus

Maxillary sinus

Inferior meatus drains into what

Nasolacrimal duct

Sphenoethmoidal recess drains which sinus

Sphenoid sinus

Superior meatus drains which sinus

Posterior ethmoid air cells

Parasympathetic to mucosal glands via what nerve that synapses in ________

CN VII synapsing in pterygopalatine ganglion

Sensory innervation of nasal cavity

Trigeminal nerve V1 (ophthalmic) and V2 (maxillary nerves)

Anterior and posterior ethmoidal artery branch from

Internal carotid artery via ophthalmic artery

Which carries more weight off the ophthalmic artery, anterior or posterior ethmoidal artery

Anterior ethmoidal carries more weight

Septal branches of sphenopalatine branch from which artery

External carotid artery via maxillary artery

Where does lateral nasal artery branch off of

Septal branches of sphenopalatine artery

Kiesselbach's area

Common area for nose bleeds

-where all the major nasal cavity arteries meet

Nasal cavity arteries drain into

Palatine venous plexus