COMD 3400 cm7 - middle ear cavity
What is the tympanic, or middle ear cavity, filled with?
the auditory tube
Air enters the middle air cavity through...?
The tympanic, or middle ear cavity, is in the ___ portion of the ___ bone.
From the superior to inferior, the middle ear is about what length?
From anterior to posterior, the middle ear is about what length?
What kind of shape does the middle ear cavity have?
6, 2, 4
Across the superior portion of the middle ear, it is about __ mm, then it narrows to about __ mm, and at the base or bottom it is about __ mm.
What is the ceiling, or attic, of the tympanic cavity?
What is the thin piece of bone at the superior margin of the middle ear cavity? It forms the roof of the tympanic cavity.
What part of the brain sits along the tegmen tympani?
This is an air-filled space between the upper portion of the middle ear and the mastoid cells. It is made of quite porous bone.
aditus to antrum
The opening of the mastoid antrum is called what?
superior-tegmental, inferior-jugular, posterior-mastoid, anterior-cartoid, lateral-membraneous, medial-labrynthian
What are the six walls of the middle ear cavity?
above the head
In relation to the body, where is the tegmental wall of the middle cavity?
What is the structure associated with the tegmental wall of the middle ear cavity?
What structure is associated with the jugular wall of the middle ear cavity?
below the feet
In relation to the body, where is the jugular wall?
jugular fossa, jugular wall
What is the large groove that accommodates the jugular vein? On what wall is it?
In relation to the body, where is the mastoid wall?
aditus to antrum, fossa incudis, pyramidal eminence
What structures are associated with the mastoid wall of the middle ear cavity?
aditus to antrum
Near the top of the mastoid wall is an opening to the mastoid process. What is this opening called?
This is the grooved out area of the mastoid wall. It is on the lower lateral portion of the wall. It accommodates the short process of the incus.
What is the opening in the mastoid wall that allows a tendon of the stapedius muscle to enter?
on the outside, or to your right
In relation to the body, where is the membranous wall of the middle ear cavity?
What structure is associated with the membranous wall of the middle ear cavity?
The is a branch of the VII nerve. It goes under the incus body and on top of the manubrium to carry information from the anterior portion of the tongue to the central nervous system.
The head of the manubrium and the body of the incus is housed in the...
In relation to the body, where is the carotid wall of the middle ear cavity?
cochleariform process, auditory tube opening
What structures are associated with the carotid wall if the middle ear cavity?
This canal on the carotid wall allows a tendon of the tensor tympani muscle to enter middle ear. It is located on the top lateral corner.
on the inside, or to your left
In relation to the body, where is the labryinthian wall of the middle ear cavity?
promontory, fenestra vestibuli, fenestra rotunda, two prominences, and a semi canal
What are the structures associated with the labryinthian wall?
In the upper anterior corner of the labryinthian wall is a partial canal for what muscle?
lateral semicircular canal and the facial VII nerve
On the upper posterior wall of the labryinthian wall are two prominences. What are they for?
This is a large protuberance from the labryinthian wall out into the middle ear cavity that is caused by the basal turn of the cochlea.
oval window or fenestra vestibuli
The large opening in the labryinthian wall?
round window or fenestra rotunda
Below the oval window and tucked in under the promontory , is this circular opening.