Vision (2)

Question 1

Which LGN layers receive information from the contralateral eye?

Answer 1

I, IV, VI

Question 2

Which LGN layers receive information from the ipsilateral eye?

Answer 2

II, III, V

Question 3

What do primary visual cortex simple cells respond to?

Answer 3

Static bar at particular orientation and position in space

Question 4

What do primary visual cortex complex cells respond to?

Answer 4

Moving bar at particular orientation at any position in space

Question 5

What is the mechanism of simple cells?

Answer 5

Input from centre-surround cells with co-linear receptive field centres of same sign

Question 6

What is the mechanism of complex cells?

Answer 6

Input from multiple adjacent simple cells with similar orientation preferences - receptive fields combined

Question 7

Which part of V1 represents the central visual field?

Answer 7

Posterior

Question 8

Which part of V1 represents the peripheral visual field?

Answer 8

Anterior

Question 9

Which cone type is not found in fovea and only used for intensity contrast, not chromatic contrast?

Answer 9

S cones

Question 10

Which LGN cells are luminance-opponent cells?

Answer 10

Parasol and midget cells

Question 11

Which LGN cells are single colour-opponent cells?

Answer 11

Midget cells

Question 12

What are the layers of the LGN and what information do they each relay?

Answer 12

Parvocellular - chromatic and achromatic - details and colour
Magnocellular - achromatic - motion and change
Koniocellular - contains coextensive single-opponent cells

Question 13

In which layers of V1 are double opponent cells found?

Answer 13

II and III