L1 - Intro

Question 1

How much of the cortex is devoted to vision?

Answer 1

1/3

Question 2

When the visual system detects changes over space, it perceives what?

Answer 2

Edges

Question 3

When the visual system detects changes over time, it perceives what?

Answer 3

New objects or movement

Question 4

How good is the visual system at detecting slow changes?

Answer 4

Not good at all

Question 5

What does the visual system have a higher resolution for - black and white or colour?

Answer 5

Black and white

Question 6

Is the visual system better at making simultaneous comparisons or comparisons at different times?

Answer 6

Simultaneous comparisons.

Question 7

What colours do our 3 types of neurons respond to?

Answer 7

Red, green and blue

Question 8

Which neurons do white objects activate?

Answer 8

Red, green and blue

Question 9

What do temporal inhibitors do?

Answer 9

Reduce the output/action potential of a neuron if it has been firing for a long period of time.

Question 10

What is troxler fading?

Answer 10

The apparent disappearance of an object over time, due to inhibition.

Question 11

What do neurons do to aid the detection of edges and changes in visual material?

Answer 11

Neurons at the border between two textures/colours will fire more intensely.

Question 12

What is the cornea?

Answer 12

The curved, transparent window/lens through which light enters the eye.

Question 13

What is an aperture?

Answer 13

An opening, hole or gap that light passes through.

Question 14

Where is information in the left side of the left eye sent?

Answer 14

To the right hand side of the retina, which is then sent to the right LGN.

Question 15

Where is information in the right hand side of the left eye sent?

Answer 15

To the left hand side of the retina and then the left LGN.

Question 16

Where is information in the left visual field of the right eye sent?

Answer 16

Right hand side of the retina, and then to the right LGN.

Question 17

Where is information in the right visual field of the right eye sent?

Answer 17

Left hand side of the retina and then to the left LGN.

Question 18

What does LGN stand for?

Answer 18

Lateral Geniculate Nucleus

Question 19

How many layers are there in the LGN?

Answer 19

6

Question 20

Which layers are in the LGN?

Answer 20

2 magnocellular and 4 parvocellular layers.

Question 21

The first layer of the left LGN receives information from where?

Answer 21

1st layer of left LGN receives information from the right magnocellular ganglion cell

Question 22

The second layer of the left LGN receives information from where?

Answer 22

2nd layer of left LGN receives information from the left magnocellular ganglion cell.

Question 23

The third layer of the left LGN receives information from where?

Answer 23

3rd layer of left LGN receives information from the left parvocellular ganglion cell

Question 24

The fourth layer of the left LGN receives information from where?

Answer 24

4th layer of left LGN receives information from the right magnocellular ganglion cell

Question 25

The fifth layer of the left LGN receives information from where?

Answer 25

5th layer of left LGN receives information from the left magnocellular ganglion cell

Question 26

The sixth layer of the left LGN receives information from where?

Answer 26

6th layer of left LGN receives information from the right magnocellular ganglion cell

Question 27

Which layers of the LGN are ipsilateral?

Answer 27

2nd, 3rd and 5th

Question 28

Which layers of the LGN are contralateral?

Answer 28

1st, 4th and 6th.

Question 29

What is retinotopic mapping?

Answer 29

The organisation of neurons such that adjacent regions in an image are represented by adjacent neurons/regions in the visual cortex.

Question 30

What is the major input into the LGN?

Answer 30

From the cortex