Chapter 4: The visual cortex and beyond

Question 1

rods and cones send signals vertically through __________ and _______________ cells

Answer 1

bipolar, ganglion

Question 2

higher convergence of rods leads to:

Answer 2

increased sensitivity to light

Question 3

less convergence of cones means:

Answer 3

better visual acuity

Question 4

Two basic forms of visual receptive fields

Answer 4

1 - excitatory-centre-inhibitory-surround
2 - inhibitory-centre-excitatory-surround

Question 5

LGN accounts for _____% of nerve fibres leaving the eye

Answer 5

90

Question 6

the LGN receives _____ from the cortex than it sends to the cortex

Answer 6

more

Question 7

feature detectors:

Answer 7

neurons that fire in response to specific features of a stimulus

Question 8

Major types of feature detectors in the striate cortex: (3)

Answer 8

simple cortical cell, complex cortical cell, end-stopped cortical cell

Question 9

orientation tuning curves:

Answer 9

plot the response of a simple cortical cell to line stimuli of varying orientations