14 Visual Cortex

Question 1

2 - The optic nerve refers to information from the retina to LGN, true or false?

Answer 1

False

Question 2

3 - A patient damaged the right side of the optic nerve, which eye is mostly affected?

Answer 2

right eye

Question 3

3 - a patient damaged the optic chiasm, which side of the eyes are most affected?

Answer 3

temporal sides of right and left

Question 4

4 - T/F: light and vision are central part of the way we map the world?

Answer 4

true

Question 5

5 - how many layers are in the visual cortex?

Answer 5

6 layers

Question 6

6 - T/F: magnocellular contains larger axons and reaches to cortex slower?

Answer 6

False

Question 7

8 - which layer of cortex contains the complex cells?

Answer 7

layers 2, 3, 5, and 6

Question 8

9 - what type of input are simple cells sensitive to?

Answer 8

particular orientation of light

Question 9

10 - are receptive fields of simple cells all the same?

Answer 9

no - they are all varied

Question 10

11 - T/F: a simple cell is sensitive to particular angles of movement?

Answer 10

False - complex cells

Question 11

11 - T/F: complex cells only respond to horizontal movement

Answer 11

False

Question 12

12 - what is a complex end-stopped cell?

Answer 12

a cell that responds to a particular orientation but only within a certain sized box field

Question 13

14 - where do the ganglion cells in the retina send their signal to?

Answer 13

LGN and then to the simple cells in the cortex

Question 14

15 - T/F: ocular dominance columns codea from a particular eye (right or left)

Answer 14

true

Question 15

16 - ocular dominance columns receive input into which layer of the visual cortex?

Answer 15

4

Question 16

17 - 4C signals go to which layers of complex cells and form binocular input?

Answer 16

2 and 3

Question 17

18 - T/F: in ocular dominance columns, selective cells are not mapped out in a systemic orientation

Answer 17

false

Question 18

19 - which connection goes to blobs?

Answer 18

koniocellular

Question 19

19 - T/F: midget cells relay to blob regions

Answer 19

true

Question 20

19 - blobs code for: black and white, color or both?

Answer 20

color

Question 21

21 - other dorsal areas receive input directly from where?

Answer 21

medial superior temporal (MST) area

Question 22

21 - T/F: other ventral areas receive input directly from the inferior temporal (IT) gyrus/cortex?

Answer 22

True

Question 23

22 - recognizing new things or making new movements is: hyperacuity, problematic, or modularity?

Answer 23

problematic

Question 24

22 - what does hyperacuity mean?

Answer 24

used to describe our ability to perceive signals smaller than the resolution of our neural transducers

Question 25

23 - in the limiting case of one neuron, both local and vector coding are: failing, selective, the same or binocular?

Answer 25

the same

Question 26

24 - T/F: single photo-receptors can encode any specific wavelength?

Answer 26

False

Question 27

24 - cones respond to: complexity and acuity, frequency and intensity, or texture and selectivity?

Answer 27

frequency and intensity

Question 28

25 - the visual cortex area _____ is concentrated and located in and around the calcarine fissure/sulcus? V1, V2, V3, V4

Answer 28

V1