Review Qs ch13

Question 1

Isoluminant gratings are thought to be detected by

Answer 1

Parvo cells

Question 2

With regard to the LGN magno cells, which is false?

Answer 2

Strongly color opponent

Question 3

Parvo cells constitute about what percent of ganglion cells

Answer 3

70

Question 4

Magno cells constitute what percent of ganglion cells

Answer 4

10%

Question 5

For a color opponent parvo neuron, that is R+ in the center and G- in the surround, which stimulus causes maximum excitation?

Answer 5

A red spot surrounded by a black annulus

Question 6

An on center magno neuron is least responsive to a

Answer 6

Isoluminant grating

Question 7

A lesion in the parvocellualr region of th LGN is expected to result in a reduction in

Answer 7

Visual acuity and wavelength based discrimination

Question 8

In the frequency doubling clinical test, what aspect of the stimulus appears to double as the temporal frequency increases

Answer 8

Spatial frequency

Question 9

Neurons located in the most dorsal layer of the primate LGN manifest which of the following properties

Answer 9

Color opponency

Question 10

Compared to magno cells, parvo callers transmit AP

Answer 10

More slowly

Magno have more myelin so they transmit faster

Question 11

Which of the following categories of cells manifest strong color opponency

Answer 11

Parvo and konio

Question 12

The neurons that constitute the parvo pathway

Answer 12

Manifest sustained responses