
Originally Posted by
niky
Actually, we don't hold every single scrap of information in our brain as analogue (kumbaga, like a picture), but as digital information... or better yet, as a program for a memory.
It's like this: Try to remember your first bike. Try to remember riding it. Your brain calls up images of whay you know you looked like at the time. Images of what you thought your bike looked like at the time, and then it manufactures a background and places everything together.
Memories are chemical. They are etched into our brain, but they are not exact. That is why you lose memories as you get older, because unless you actively (electrically) access those memories often, the matrix holding them dissolves over time, as our brain cells start dying out.
Kaya nga medyo fallible ang memory natin, because it is not precise. This is a conundrum for crime scene and disaster investigators, as eyewitnesses often remember things wrong. They incorrectly recreate memories... often wildly.
In fact, people will often not witness an event precisely as it happens. We carry around a virtual reality simulator within our heads. It helps us deal with an environment overloaded with information. As you read this, you cannot see your computer or your surroundings unless you look at them or remember to look for them in your peripheral vision. Our perception is that limited.
If something is too far beyond our experience for us to grasp, we cannot perceive it properly. Thus, some people see "ghosts" or UFOs, because an environmental stimulus overwhelms their internal virtual reality simulator. That's why horror movies can scare us so... they completely disrupt our reality at times and upset our equilibrium.
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What is difficult for scientists to explore is the seat of consciousness. You can map out the electrical and chemical activity in the brain, but it's difficult to pinpoint what makes up your ego, or where your thoughts reside.
Nobody knows how much you can add or subtract to the brain while keeping the same person inside of it. Will you still be you after 40% brain damage? Would you still be you if someone actually made your brain grow? (you must be... it's much bigger than when you were a kid).