Question:
The antagonistic center-surround RF structure is widely used in the visual system to encode opposing pairs such as black/white, yellow/blue, red/green. Why does the brain use this center-surround RF instead of a much simpler center only RF?
Question:
Why is relative intensity more important than absolute intensity?
Question:
Why does the brain use two different types of neurons (on-center/off-surround and off-center/on-surround) to encode one variable, the light intensity?