Flashcards in Sinus Nose and Ear Anatomy Deck (46):
Le Fort Fractures can disrupt this bone in the nasal cavity
The ethmoid bone's cribiform plate
The three mucosa of the nasal cavity
Keratinised Stratified Squamous
Bones of the Lateral Wall of the Nasal Cavity
Bones of the Medial Wall
(Also hyaline cartilage)
What cranial nerve is olfactory?
Where does the blood supply originate from
The internal and external carotids
The ophthalmic artery becomes...
Anterior and Posterior Ethmoidal Arteries
The maxillary artery becomes the...
Sphenopaletine and Greater Paletine Arteries
The Facial Artery becomes the...
Lateral Nasal branch of the facial artery and
The septal branch of the superior labial
What is Keisselbach's Area
Arterial Anastamosis on the nasal septum
This is a common site for nosebleeds (epistaxis)
Which two branches of the trigeminal nerve supply the lateral walls and the septum of the nasal cavity?
CN V1 and CN v2
a.k.a. ophthalmic and maxillary
Which arteries originate from the external carotid artery/
Facial and Maxillary
Which artery originates from the internal carotid artery?
Where is the Eustachian tube located and what is its function?
Located in the lateral wall of the nasopharynx
Its function is to link the middle ear to the nasopharynx
What mucosa lines the sinuses?
Mucous Secreting Respiratory
How does the mucous drain into the nasal cavities?
Through the ostia of the lateral walls
Where do the frontal and maxillary sinus drain?
The middle meatus
Where does the sphenoidal sinus drain?
The sphenoethmoidal recess
Nasolacrimal Duct drains into the?
The ethmoidal sinus drains where?
Both the superior and the middle meatus
What is sinusitis?
Inflammation of the paranasal sinus mucosa
Where can sinus pain be referred to?
The three bones of the middle ear cavity and their joint types
Which foramen does the facial nerve pass through?
The stylomastoid foramen in the floor of the middle ear cavity
Where does the facial nerve originate?
The brain stem where the pons and medulla meet
Which cranial nerve supplies the laryngopharynx?
What does the CN 9 supply? (glossopharyngeal)
Nasopharynx, Oropharynx, Middle Ear Cavity, Tonsils, Eustachian Tube
What supplies the tympanic membrane?
CNv3 supplies the external surface
CN9 supplies the internal surface
What is the function of the stapedius?
To minimise movement of the stapes and protect against excessive noise in the internal ear
What is perilymph?
The fluid in the bony labyrinth
Where is endolymph?
This is found in the cochlear and semicircular duct
What is the chorda tympani
Branch of the facial nerve passing through the tympanic membrane
Responsible for parasympathetic innervation to anterior 2/3rds of tongue, sub-mandibular and sublingual salivary glands.
What feature is responsible for the production of earwax?
An H shaped suture formed of the frontal, parietal, sphenoid and temporal bones which is thinnest part of the skull
Which part of the stapes fits into the oval window?
Where does the facial nerve exit the posterior cranial fossa?
Internal acoustic Meatus
What provides parasympathetic innervation to the sub-mandibular and sublingual salivary glands?
The chorda tympani branch of the facial nerve
Where do the muscles of facial expression originate and insert?
Originate on bone
Insert on superficial fascia
What is lost in illness, making a patient have 'sunken cheeks'?
The buccal fat pad
How do you clinically test the the muscles of facial expression and CN7 motor function?
Ask a patient to -
Close eyes tightly
Puff out cheeks
What bone does the otic capsule sit in?
The temporal bone
What are the three semicircular canals?
What is the cupula?
This is the apex of the cochlea spiral
These are present within the semicircular canals
Semi circular ducts filled with endolymph
Where does the vestibulocochlear nerve connect?
The junction at the brainstem between the pons and medulla
(just like CN7)