Primary visual pathway

Question 1

Striate cortex

Answer 1

Primary visual pathway aka V1 AKA area 17. In the Occipital lobe, just under the parieto-occipital sulcus.

Very easy to recognise due to the striate that runs through it

Question 2

Retino-cortical expansion

Answer 2

Much more of the visual cortex is dedicated to the macula, the center of your vision.

The peripheral claims a much smaller part

We found this out due to war, where ‘new’ bullets created a lesion io destroying the whole brain. They saw certain lesions only affected certain parts.

Question 3

Visual area

Answer 3

Each visual area contains a seperate, retinotopic map of the visual field. Meaning what you see is reflected directly on that area. Every visual area has similar projections. So V1 has a map, V2 etc etc.

Doesn’t have to be a complete map,

Question 4

Segregation

Answer 4

The LGN projects to the V1, and the layers project to different parts of the cortex.

The Magno projects to layer 4C a in the striate cortex, while the parvo projects to 4C b

The info remains separate, the Magno sends more info to the Parietal cortex, while the Parvo sends most to the temporal cortex

Question 5

Layer 4

Answer 5

Biggest layer, strongest seperation in this layer.

Weaker in layer 2/3 and 5/6.

In layer 4, you can clearly see the Ocular Dominance columns when doing a DOG labeling task. You see the black and white, sending from each eye