Anatomy Flashcards
Where is the root of the nose?
between the eyes
What is the length/rim of the nose called?
dorsum
What is the skin surrounding the nares called?
ala
What is the invaginated skin from the nose to the upper lip called?
philtrum
What is the bony projection out of the perpendicular plate of the ethmoid bone called
crista galli
What is the crista galli attached to?
falx cerebri- dura
What is found surrounding the perpendicular plate?
superior and middle concha which are themselves surrounded by ethmoidal air cells
How does the ethmoid bone contribute to the nasal cavity?
forms parts of the root, lateral walls and septum
How does the ethmoid contribute to the orbits?
forms an orbital plate which forms the medial aspect of the orbit
Where are the conchae found in the nasal cavity?
lateral wall (i.e not the septum
What forms the septum?
vomer; perpendicular plate of ethmoid; septal cartilage
What type of skull fracture can disrupt the cribiform plate and therefore smell?
Le Fort II and III
What type of mucosa is found in the nasal vestibule?
stratified squamous epithelium- changes from keratinised to non-keratinised
What are the 2 types of mucosa foudn in the nasal cavity?
respiratory epitheliu madn olfactory epithelium
What does the olfactory epithelium line?
the superior concha
What is the olfactory pathway?
receptor cells in the olfactory epithelium; pass up through cribiform plate; synapse with olfactory blub; neurons pass along olfactory tract to temporal lobe and olfactory areas
Where do the olfactory bulbs lie?
beside the crista galli
What is the somatic sensory innervation of the septum?
opthalmic and maxillary divisions of trigeminal
How do you divide up the areas of the septum supplied by the opthalmic and maxillary divisions?
draw a diagonal line from the sphenoidal sinus to the tip of the nose; above this line is ophthalmic and below is maxillary
What is the nerve of the ophthalmic division that supplies somatic sensory to the septum?
anterior ehtmoidal nerve
What is the nerve that is a branch of V2 that supplies the septum?
nasopalatine nerve