So really what happens is that you don't see the trees for the wood," says Alexander Heimel, group leader at the Netherlands Institute. "But when this object is surrounded by similar objects, the cells are less active. So when you look at a specific object, the nerve cells in the primary cortex are activated and you see this object. Nerve cells in this area are sensitive to perceiving objects within a very small field of vision. One of the most important parts of this area, the primary visual cortex, is the area where a visual stimulus first reaches the cortex. The brain area responsible for processing vision is located at the back of the brain.
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