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Flashcards in Ear Deck (12)
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1

describe the pterion

where the parietal, temporal, sphenoid and frontal bones come together

2

why is the pterion gods joke?

middle meningeal artery sits behind it, its the thinnest point in the skull

3

the bony labyrinth is filled with?

perilymph

4

the membranous labyrinth is filled with?

endolymph

5

external surface of tympanic membrane is supplied by?

CN v3 (auriculotemporal branch)

6

internal surface of tympanic membrane is supplied by?

CN IX

7

describe the lymphatic drainage of the superior half of pinna

lateral = parotid lymph nodes

cranial surface = mastoid lymph nodes

8

the general lymphatic drainage of the auricle

superficial cervical lymph nodes

9

most depressed part of tympanic membrane is?

the umbo

10

pars tensa is the thickest/thinnest part of tympanic membrane?

thickest, flaccida is the thinnest part

11

sensory nerve supply to eustachian tube

CN IX

12

muscle attached to stapes and its nerve supply?

stapedius, CN VII