V1 organisation

Question 1

V1 aka primary visual cortex, striate cortex

Answer 1

Highly organized;
1. Topography
2. Cortical magnification
3. Cortical modularity
4. Receptive fields

Question 2

Topography

Answer 2

Retinotopic organization at the thalamus and the V1. Objects that are close in the visual field are also close in the V1

Question 3

Cortical magnification

Answer 3

Parafoveal areas take up less space in the V1 (less important info so takes less space)

Question 4

Cortical modularity

Answer 4

Vertical organization and columns, they’re organized in stripes.

Ocular dominance columns; stripes of neurons that connect to one of the eyes. Each line prefers an eye. These lines are acquired by learning

Question 5

Receptive fields

Answer 5

Region in the retina that evokes a response in measured neuron (on-center/off-surround). at the cortex the fields become more complex bc they combine input from multiple LGN cells. It can be specific to a certain orientation (simple cell)

Question 6

Grandmother cells

Answer 6

The higher up the processing stream, the more specialized the neurons (eg fusiform face area, neurons that only respond to grandmother)