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NLM2 Anatomy > The ear > Flashcards

Flashcards in The ear Deck (10):
1

Function of the inner ear

Balance, orientation of head in respect to gravity and direction of accelerative and decelerative forces on head

2

What does the external ear consist of?

Auricle, external auditory meatus and tympanic membrane

3

What is the auricle made of?

Elastic cartilage and skin

4

What does the middle ear consist of?

Auditory ossicles (malleus, incus &stapes) and communicates posteiorly with mastoid air cells anteriorly with pharynx by the Eustachian tube

5

What is the sensory supply of the ear?

External ear= auriculotemporal branch of CNV and small auricular branch of vagus
Internal ear= vestibulocochlear nerve

6

What is the bony labyrinth?

Bony wall of outer ear
-Vestibule
-Semicircular ducts
-Cochlea
Filled with perilymph

7

What is the membranous labyrinthe?

Found within bony labyrinthe
-Utricle
-Saccule
-Semicircular canals
-cochlear canal
Filled with endolymph

8

What are the specialised sensory receptors of the utricle and saccule?

The maculae

9

What are the specialised sensory receptors of the semicircular canals?

The ampullary crests
(canals at right angles in 3 planes)

10

What are the specialised sensory receptors of the cochlea?

Spiral organs of Corti (sound wave receptors)