Nose Anatomy Flashcards
roof of nasal cavity
cribiform plate + crista galli
lateral wall of nasal cavity
superior and middle conchae, ethmoidal are cells, orbital plate of ethmoid
septum of nasal cavity
perpendicular plate of ethmoid + vomer
disrupting cribiform plate of ethmoid bone can cause ….
danger of infection spreading from nasal cavity to anterior cranial fossa. Le Fort II + III
mucosa of entry to nose
keratinised stratified squamous epithelium
mucosa of most of nasal cavity
respiratory epithelium
mucosa of top of nasal cavity
olfactory mucosa
landmarks of olfactory nerve (CNI)
Bulb, Tract (ends in temporal lobe), passes through cribiform plate of ethmoid bone.
Somatic nerve supply to nasal cavity…
Opthalmic (CN V1) anterosuperiorly
Maxillary (CNV2) posteroinferiorly
blood supply?
External and internal carotids
External carotids?
Facial and maxillary
Internal?
Opthalmic
Arterial anastomosis on the nasal septum
Kiesselbach’s Area (a common site of epistaxis [nosebleed])
Meatus
Space under each concha
superior, middle, inferior
How to confirm placement of NG tube
Xray
NG tube midline down to diaphragm
NG tube clearly visible
Tip should be 10 cm beyond GOJ
What filters the air?
Vibrissae (small hairs)
Mucous drains into nasal cavities from the sinuses via…
ostia (lateral walls)
frontal sinus drains to..
middle meatus
ethmoidal cells drains to …
superior and middle meatuses
sphenoidal sinus drains to …
sphenoethmoidal recess
Maxillary sinus drains to…
middle meatus
Nasolacrimal duct
inferior meatus
Paranasal sinuses lined by..
mucous-secreting resp mucosa
The problem with maxillary sinusitis …
Ostia sits superiorly so drains against gravity
extraction of tooth may cause…
oro-antral fistula
Why maxillary sinusitis may present as toothache
common sensory nerve supply from CNV (referred pain)
