T9.2 Oculomotor reflexs

Question 1

Turning your head to the right would cause the ____ horizontal semicircular canal to ____ and move the eyes to the_______.

A. Left, Inhibit, Right 
B. Right, Inhibit, Left
C. Left, Excite,Left 
D.Right, Inhibit, Right
E. Right, Excite, Right 
F. Right, Excite, Left  

RFA

Answer 1

Ans. F.

Question 2

During warm water caloric testing in the left ear the_____ kinocilia is _____ move the eyes to the_____.

A. Left, inhibited, right
B. Right, inhibited, right 
C. Left, excited, left
D. Left, inhibited, left
E. Left, excited, right 
F.  Right, excited, right 

RFA

Answer 2

ANS. E

Question 3

A 69 year old man has been losing his hearing. His doctor believe it may be do to a medication that he taking. If he is talking all of the following. Which one should he discontinue to preserve the integrity of his hair cells?

A.levothyroxine
B.albuterol
C.sitagliptin
D.doxycycline
E.esomeprazole
F. streptomycin 

RFA

Answer 3

Ans F. Streptomycin-can be toxic to vestibular hair cells and cause damage to the vestibular system

Question 4

Warm water in your right ear would cause ____ beating nystagmus and cold water in the left ear would cause _____ beating nystagmus

Answer 4

Warm water in your right ear would cause RIGHT beating nystagmus and cold water in the left ear would cause RIGHT beating nystagmus

Question 5

When a person is spinning to the left in a chair to they initially experience _____ beating nystagmus from the ______ reflex as their eyes slowly go _____; as they continue spinning they experience _____ beating nystagmus due to the ______ reflex; when the chair is stopped the experience _______ nystagmus due to the _____ reflex

Answer 5

When a person is spinning to the left in a chair to they initially experience LEFT beating nystagmus from the VOR reflex as their eyes slowly go RIGHT; as they continue spinning they experience LEFT beating nystagmus due to the OPTOKINETIC reflex; when the chair is stopped the experience RIGHT nystagmus due to the VOR reflex

Question 6

You are a kind homeless guy minding your own business when a douche named Josh Gad kicks you in the left side of your head again causing damage to structures in your inner ear. What direction will your nystagmus beat to?

Answer 6

Left beating nystagmus b/c when u got kicked in the head w/ inner ear damage u can assume ur vestibular system is damaged so there are no more nerve impulses coming from the left side and at rest there are always steady impulses so it is like ur right ear is over active. so your eyes will look to the left slowly and you will have RIGHT BEATING NYSTAGMUS