My question is about how the brain processes visual information and what kind of different parts or functions in the brain there are.
A couple of times I've abruptly waken up during sleep, possibly REM state or definitely some quite deep sleep (and not just one minute after falling asleep). Why I woke up I can't really say, but possibly due to sort of escaping from nightmare (or possibly just a sort of feeling of an electrical discharge but let's not get into that now).
As I wake up in this very special state, basically asleep but eyes open and observant enough to intelligently realize what is going on, my vision is extremely strange. For example, once I was looking at a pile of some cables and I could extremely clearly see that my cat was there, moving. But the cat was too long at the same spot (one minute?) and eventually I realized that it was rather hallucination and there was no cat. Another time I was looking at my blanket with some light coming from the window in the background. I could absolutely clearly see that the blanket was moving in different ways even at the same time I knew again it was a hallucination.
Let's forget about the cat for now. About the moving blanket incident. (Oh yes and I guess I have to mention that none of this has anything to do with drugs or such, I never tried them.) It very much seems that the blanket was moving either because some particular part of my brain was turned off due to the semi-sleeping state or it was turned on. The visual effect was NOT a product of imaginary dreaming. In a dream, you basically imagine everything. But in this case I was clearly looking at the blanket, extremely conscious that I was not sleeping and no matter how much I tried not to "imagine" or to get "sober", the blanket was still moving and wobbling in a certain way.
My question is, what is that part in my brain that was turned off or on and more importantly, what is the purpose of that part or function?
If I should give it a shot and quickly guess what it might be I might say that maybe there is a function in the brain that constantly alters each object in vision by changing their shape in multiple ways in order to compare the objects to memory prints. In other words, each candidate for an object (or it's shape) is subconsciously constantly altered until it matches with a memory print whereupon the object is recognized (or if it's not matched it either doesn't come across to consciousness or is interpreted basically as an unrecognizeable object). Note that this is just (remote?) speculation.