Week 8

Question 1

Vis, V S, Pro

What are the three main contributors to orientation?

Answer 1

Vision, vestibular system, proprioception

Question 2

Lin Acc and Ti

What do otolith organs detect?

Answer 2

Linear acceleration and tilt

Question 3

Ang V

What do semicircular canals detect?

Answer 3

Angular velocity

Question 4

Ref that stabilizes Ga via V input from both S of the head

What is the vestibular ocular reflex (VOR)?

Answer 4

A reflex that stabilizes gaze via vestibular input from both sides of the head

Question 5

Mod V Aff firing by irrigating E C with warm/cold water

What is caloric vestibular stimulation?

Answer 5

Modulating vestibular afferent firing by irrigating the ear canal with warm or cold water

Question 6

Non-I method to alter V Ner Ac using constant C over the Mas

What is Galvanic Vestibular Stimulation (GVS)?

Answer 6

A non-invasive method to alter vestibular nerve activity using constant current over the mastoid

Question 7

Decect Ti and Lin Acc with cells Or in all directions

What is the function of the utricle and saccule?

Answer 7

Detect tilt and linear acceleration with cells oriented in all directions

Question 8

Dangerous Ill for P where Acc is mistaken for C, leading to incorrect PA

What is the false climb illusion?

Answer 8

A dangerous illusion for pilots where acceleration is mistaken for a climb, leading to incorrect pitch adjustments

Question 9

Cup becomes L/H than S fluid, causing N when lying down

What happens during positional alcohol nystagmus?

Answer 9

The cupula becomes lighter or heavier than the surrounding fluid, causing nystagmus when lying down (false spinning when not moving)

Question 10

Reduce overall R to GVS, does not I F-F gain of V R

How does fear affect vestibular control?

Answer 10

Fear can reduce the overall response to GVS, but does not influence the feed-forward gain of the vestibular reflex