WK2 L1 Visual processing

Question 1

receptive fields

Answer 1

area over which stimulation can increase or decrease a neurons activity

Question 2

orientation tuning

Answer 2

a neuron will fire maximally when presented with it’s preferred direction. As the orientation of the stimulus moves away from the preferred direction, the cells activity will gradually decrease

Question 3

organization of v1

Answer 3

Ocular dominance columns, blobs, orientation columns

Question 4

Ocular dominance columns

Answer 4

cells that process info from either the left or right eye

Question 5

blobs

Answer 5

cells that are sensitive to colour and finer details

Question 6

orientation columns

Answer 6

cells that are sensitive to the same orientation

Question 7

Lateral geniculate nucleus

Answer 7

the nucleus in the thalamus that recieves input from the optic nerve and sends fibers to the cortical receiving are for vision

Question 8

LGN purpose

Answer 8

groups info and smoothes it out

Question 9

ganglion cells

Answer 9

edge detectors

Question 10

scotoma

Answer 10

region of blindness or redcued sensitovity in the visual field

Question 11

hemianopia

Answer 11

a visual field defect - that affects half of the visual field

Question 12

spatial frequency

Answer 12

the number of cycles in the grating per degree of visual angle