Lecture 4- Ear Flashcards
roof of middle ear
tegmen tympani
floor of middle ear
thin plate of temporal bone, below is the superior bulb of IJV
lateral middle ear
typmanic membrane
medial middle ear
- promontory
- fenestra vestibuli (oval window)
- fenestra cochlea
- Facial canal prominence
- lateral semicircular canal prominence
What is fenestra vestibuli
on medial middle ear boundary, oval window, receives stapes
What is fenestra cochlea
on medial middle ear boundary, round window, inf to oval window
What is lateral semicircular canal prominence
on medial middle ear boundary, tendon of tensor tympani
Anterior wall of middle ear separates the middle ear from the…. and it has 2 openings:
- carotid canal
- auditory tube and semicanal for tensor tympani
The posterior wall of the middle ear contains the… and…
pyramidal eminence
aditus ad antrum
What is the pyramidal eminence that is located on the posterior wall of the middle ear?
a hollow projection of bone that serves as the origin of stapedius muscle
What is the aditus ad antrum that is located on the posterior wall of the middle ear?
entrance to tympanic antrum
What are the 2 muscles of the middle ear
tensor tympani
stapedius
The tensor tympani is innervated by … and comes from arch#….
V3
1
The stapedius muscle is innervated by… and is from arch#…
CNVII
2
Functions of muscles in the middle ear
reduce oscillations of ossicles and protectts inner ear from injury during loud noises
