Vestibular System

Question 1

Semicircular canals detect rotation via the ________

Answer 1

Crista ampularis

Question 2

What do the utricle and saccule detect

Answer 2

Tilt, linear acceleration (accomplished via hair cell receptor organ “macula” and otoliths)

Question 3

Receptors of the peripheral vestibular organ synapse with what?

Answer 3

Synapses with sensory neurons of CN 8

Question 4

What hair cell receptor organ lies within ampulla

Answer 4

Crista ampullaris

Question 5

Depolarizer hair cell is:

Answer 5

Less polar and triggers a response

Question 6

Hyperpolairzed hair cell is:

Answer 6

More polar and harder to evoke a response

Question 7

What are characteristics of the hair cell repeceptor organ “macula”

Answer 7

Flat, patch-like collection of hair cells, horizontal orientation on the floor of utricle, vertical orientation on the wall of the saccule, covered with a gelatinous layer, embedded on the gelatinous layer are “otoliths”

Question 8

If a vestibular disease is shown affection the right side what side is the disease on?

Answer 8

Right side