Brain Galaxy : Wonders of Human Brain

This is your brain. Isolated from the world inside your skull. Your senses provide its only clues to what's going on out there. But how can your brain take the limited information from your senses to build your trust worth reality?

Why your brain is constantly being fooled by what you see? What we're trying to is not the world as it is, but something else. We are actually generating perspirations of a world that's useful to see. And that useful perception doesn't actually have to correspond with what's actually there.

When you open your eyes, right, first time in the morning, say do you think you see the world as it really is? It has to do with how your brain uses shadows to make decisions about what it's seeing.

Take a look at any object. One glance, and you know what it is. But how do you know what it is, and where it is positioned in space?

The light reflected this object is converted by your eyes into an electrical signal and is send down a neurological pathway called the optic nerve to the back of your brain. Starting in the region called the visual cortex, the image is cross-referenced with memory of past experiences started through your brain as you try to identify the object. Once it's figured out what it is, your brain has to decide how the object is positioned in the space and one of its most reliable tool is use shadows. In a world with a single light source your brain has learned to trust shadows as a near-fool proof way to know the behavior of objects in space. And in general it worked.

Your brain using past experiences to generate its perception of the world.