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air

What is the tympanic, or middle ear cavity, filled with?

the auditory tube

Air enters the middle air cavity through...?

petrous, temporal

The tympanic, or middle ear cavity, is in the ___ portion of the ___ bone.

15mm

From the superior to inferior, the middle ear is about what length?

15 mm

From anterior to posterior, the middle ear is about what length?

hourglass

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.

epitympanic recess

What is the ceiling, or attic, of the tympanic cavity?

tegmen tympani

What is the thin piece of bone at the superior margin of the middle ear cavity? It forms the roof of the tympanic cavity.

cortex

What part of the brain sits along the tegmen tympani?

mastoid antrum

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?

tegmen tympani

What is the structure associated with the tegmental wall of the middle ear cavity?

jugular fossa

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?

behind you

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?

fossa incudus

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.

pyramidal eminence

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?

Chorda tympani

What structure is associated with the membranous wall of the middle ear cavity?

Chorda tympani

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.

epitympanic recess

The head of the manubrium and the body of the incus is housed in the...

straight ahead

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?

cochleariform process

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?

tensor tympani

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?

promontory

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.

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