Lecture 10: Vision 1

Question 1

What are the two hemiretina of each eye?

Answer 1

Nasal and temporal hemiretina

Question 2

Which hemiretina do not decussate?

Answer 2

The temporal hemiretina

Question 3

Is the choroid or the sclera of the eye highly vascular?

Answer 3

Choroid

Question 4

Where are all the cones of the eye located?

Answer 4

In the fovia.

Question 5

What are the five types of neurons of the retina?

Answer 5

Photoreceptors (rods and cones)
Bipolar cells
Ganglion cells
Horizontal cells
Amacrine cells

Question 6

Which two retinal neurons mediate lateral interaction?

Answer 6

Horizontal cells and amacrine cells.

Question 7

Which is the only retinal neuron type to fire action potentials?

Answer 7

Ganglion cells.

Question 8

What are the three main types of ganglion cells?

Answer 8

M-type (large)
P-type (small)
NonM-nonP (bistratisfied)

Question 9

What is the most common type of ganglion cell? And what colour contrast to they respond to?

Answer 9

P-type. Respond to red/green colour contrast.

Question 10

Which type of ganglion cell responds to yellow/blue colour contrast?

Answer 10

NonM-nonP type

Question 11

Which neurotransmitter do the photoreceptors of the eye use?

Answer 11

Glutamate.