2. Topography 2

Question 1

Lower and upper radiations of Meyers loop end up in?

Answer 1

Lower : Lower Cortex
Upper: Upper Cortex

Question 2

Lower radiations pass through Meyer’s loop, why?

Answer 2

To avoid lateral ventricles- because it is filled with fluid and should not be invaded.

Question 3

Meyers loop is also called?

Answer 3

Temporal Lobe

Question 4

Meyers loop is also called?

Answer 4

Temporal Lobe

Question 5

Damage to Meyer’s loop produces?

Answer 5

Pie in the sky defect

Question 6

Damage to Meyer’s loop produces?

Answer 6

Pie in the sky defect

Question 7

2 principle columns of the hyper column?

Answer 7

LE dorminant
RE dorminant

Question 8

1st point where convergence of binocular info is seen in the visual cortex?

Answer 8

In the hyper columns

Question 9

Stereo vision depends on?

Answer 9

Disparity

Question 10

What is required to have binocular correspondence?

Answer 10

Eyes need to be aligned

Question 11

In strabismus- suppression of 1 eye by the cortex is done by?

Answer 11

Done by back projection to LGN

Question 12

Is info aligned in the case of monocular crescent?

Answer 12

No

Question 13

Cortex has how many layers?
Which layer is primary layer?

Answer 13

6
Primary layer = 4

Question 14

Magno and Parvo move to which layers in the cortex?

Answer 14

Magno moves to 4C alpha
Parvo moves to 4C beta

Question 15

Input layer for magno and parvo?

Answer 15

4C

Question 16

3 TARGETS in the cortex for konio layers?

Answer 16

4A, layer 2, blobs

Question 17

What is Retina-Geniculate system relate to?

Answer 17

Relates to primary visual system
Info moves from retina –> LGN –> Striate cortex

Question 18

Site of conscious vision in humans?

Answer 18

Cortex

Question 19

Huge amount of cortex is devoted to?

Answer 19

Macular and foveal vision

Question 20

Role of sulcus in cortex

Answer 20

Upper from lower visual cortex

Question 21

2 factors relating to cortical magnification and resolution- center vs periphery?

Answer 21

Many photoreceptors passing foveal info at the center compared to the periphery.
More convergence of photoreceptors at the periphery compared to the center.

Question 22

What type of defect only occurs in cortical lesions and never seen in optical radiation lesions?

Answer 22

Macular sparing