T9.3 Ocular Reflexes 2

Question 1

A doctor is testing the pupillary light reflex and finds that the patient has bilateral loss of the reflex when light is shone in the right eye. At the first synapse. What is lesioned?

A. Optic tract
B. Edinger Westphal nucleus
C. Pretectal nucleus
D. Ciliary Ganglion

RFA

Answer 1

Ans. C Pretectal Nucleus

Question 2

A 6 year old boy is eating a sour patch kid, what describes the signal transduction pathway he is experiencing?

A. Sodium ions enter through amiloride channels
B. Activation of Adenylyl cyclase
C. Activation of phospholipase C
D. Hydrogen ions enter through amiloride channels.

RFA

Answer 2

ANS. D

A. Salty

B. Sweet

C. Bitter

Question 3

A 62 women comes to the doctor with the complaint that she has lost the sensation of taste. Her face shows normal expression and no loss of hearing. All results are normal for ocular reflexes. Gag and tongue movements are also normal. Which area is possibly lesioned?

A. Pretectal Nucleus 
B. CN VII 
C piriform cortex
D CN IX
E Superior Olive
F Edinger Westphal Nucleus

RFA

Answer 3

Ans C. Piriform cortex - This patient is suffering from hyposmia. This is kinda of tricky question. So while the the patient has lost the sensation of taste. From other information I gave it can be concluded that the Cranial nerves are not damaged. Patients that suffer damage to their smell function most commonly complain of lost of taste, when in reality they don no obtain adequate flavor from the food.

The other area of the olfactory cortex are periamygdaloid cortex and the entorhinal cortex they are all located near the uncus.

A. Pretectal Nucleus- is the first synapse of the pupillary light reflex

B. CNVII- Facial expression is fine so doesn’t look like ole CNVII is effected.

D. CNIX- Gag reflex is gucci so no this on e

E. Involved in Auditory System not taste or smell, sorry :(

F. Edinger Westphal Nucleus the Nucleus CNIII in the light reflex.

Question 4

The dorsolateral branch of your PICA is destroyed cuz you are really fat got a aneurysm. Which of the following symptoms will occur?

A) Loss of sensation from body
B) Cant wrinkle upper R forehead
C) Cant wrinkle upper L forehead
D) Loss of taste 
E) Loss of smell

Answer 4

Answer - D

this aneurysm causes loss of taste, ipsi pain from face, and contra pain from body

Question 5

Michelle is a brilliant medical student but is plagued by loans like all her fellow classmates. In order to feed her 90 cats and pay for her video games she sells her used socks to creepy brown guys. When the creepy brown guys smell her socks which of the following happens in the olfactory receptor neuron?

A) Ca Influx, Cl influx
B) Ca influx, Cl efflux
C) Cl efflux, Na efflux
D) K influx , Na efflux

Answer 5

Answer B

Question 6

With a punch to the nose neurons can _____ but a lesion at the ____ they will not.

Answer 6

With a punch to the nose neurons can REGENERATE but a lesion at the UNCUS they will not.

Question 7

The broadmanns area for gustatory is __x__ and it synapses at the __y___ in the thalamus

A) 13, VPM
B) 21, VPL
C) 14, VPM
D) 14,VPL
E) 13, VPL

Answer 7

Answer = A