Ear

Question 1

What is superior to tympanic membrane?

Answer 1

Epitympanic recess

Question 2

What is medial to tympanic membrane?

Answer 2

Tympanic cavity proper

Question 3

Roof of middle ear?

Answer 3

Tegmen tympani

Question 4

Floor of middle ear?

Answer 4

thin plate of temporal bone (separates it from jugular fossa which contains IJV)
this is why you can sometimes hear your pulse

Question 5

Lateral wall of middle ear?

Answer 5

Tympanic membrane

Question 6

Medial Wall of middle ear?

Answer 6

1. Promontory
2. Oval window
3. Round window
4. Facial can prominence
5. lateral semicircular canal prominence
6. Tendon of tensor tympani

Question 7

Anterior wall of middle ear?

Answer 7

aka Carotid wall

2 openings present: auditory tube and semicanal for tensor tympani

Question 8

Posterior wall of middle ear?

Answer 8

Pyramidal Eminence (origin of stapedius)

Aditus ad antrum (entrance to tympanic antrum)

Question 9

Stapedius attaches where and innervated by what?

Answer 9

Attaches to neck of stapes and innervated by CN VII

Question 10

Tensor Tympani attaches where and innervated by what?

Answer 10

Attaches to handle of malleus and innervated by CN V3

Question 11

Venous drainage of middle ear

Answer 11

Accompaning v. to superior petrosal sinus or pterygoid plexus of vv.

Question 12

Chorda tympani n. passes between…

Answer 12

handle of malleus and incus

Question 13

What provides the tympanic plexus with symp. and parasymp. innervation?

Answer 13

Symp: cartoticotypanic nn.

Parasymp: tympanic br. of CN IX

Question 14

Structures of inner ear

Answer 14

Semicircular Canals: Balance and position

Cochlea: Controls Hearing

• Oval window is beginign of cochlea and receives stapes
• Round window is end of cochlea and vibrates to perceive sound