W21-L7: Ear and Auditory Tube Flashcards Preview

Matt's Block 06 - Neuro block > W21-L7: Ear and Auditory Tube > Flashcards

Flashcards in W21-L7: Ear and Auditory Tube Deck (18)
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1
Q

What is the role of the auricle?

A

collects sound

2
Q

What is the lateral 1/3 of the external acoustic meatus and what is the medial 2/3?

A

Lateral 1/3=Cartilagenous

Medial 2/3= Temporal bone

3
Q

What nerve innervates the posteroinferior surface of the external acoustic meatus?

A

Vagus

4
Q

What nerve innervates the anterosuperior surface of the external acoustic meatus and external surface of tympanic membrane?

A

Auriculotemporal nerve (V3)

5
Q

What shape is the external surface of the tympanic membrane?

A

Concaved

6
Q

Where is the cone of light on the external surface of the tympanic membrane?

A

Anterio-inferior

7
Q

Where is the Epitympanic recess and where does it go?

A

Superior to tympanic membrane, connects to mastoid air cells

8
Q

Where is the tympanic cavity proper?

A

Directly medial to the tympanic membrane

9
Q

What are the ossicles called?

A

Stapes, Incus and Malleus

10
Q

What muscle is on the anterior aspect of the medial wall of middle ear?

A

Tensor Tympani (CN V)

11
Q

What does the tensor tympani attach to?

A

Malleus

12
Q

What muscle is on the posterior aspect of the medial wall of middle ear?

A

Stapedius muscle (CN VII)

13
Q

What does the Stapedius muscle attach to?

A

Stapes

14
Q

What is the bony labyrinth filled with?

A

Peri-lymph

15
Q

What is the Membranous labyrinth filled with?

A

endolymph

16
Q

What are the there semi-circular ducts?

A

Anterior, Horizontal and Posterior

17
Q

Where are the ampulla situated and what do they sense?

A

Base of the semi-circular ducts which sense dynamic changes in equilibrium

18
Q

Where are high frequency’s represented on the cochlear duct?

A

Base, low frequency at the apex

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