Ear Flashcards
What are the 4 external ear components?
Auricle
External Acoustic Meatus
Auditory Canal
Tympanic Membrane
What are the middle ear components?
Cavity w/in petrous portion of temporal bone (lined with mucosa)
Contains ossicles
Where is the internal ear located?
Between the middle ear and the internal acoustic meatus
What are the internal ear components?
Semicircular canals
Cochlea
What are the three ossicles of the ear?
Incus
Malleus
Stapes
Pain from the tympanic membrane is mainly carried in what nerve?
The auricotemporal branch of V3
The middle ear is primarily filled with what?
Air
The primary function of the middle ear is to what?
Mechanical conduction of sound to the fluid filled internal ear
What are the two muscles of the ear and their functions?
Tensor tympani: dampens vibrations of the tympanic membrane
Stapedius: Dampens oscillations of the stapes
Which two nerves pass through the middle ear?
Horizontal of CN VII
Chorda Tympani of CN VII
Between which two structures does the facial canal run?
Internal acoustic meatus
Stylomastoid foramen
What is otitis media?
Infection with inflammation of the ear that results in fluid build-up of the middle ear.
What does the fluid buildup in the ear from otitis media cause?
It puts pressure on the tympanic membrane
What are the common causes of otitis media?
Viral infection
Adenoids
What are 3 symptoms of otitis media?
Pain
Fever
Headache
