Sagar's Blog

August 16, 2010

The Human Mind-II

Filed under: Info on the Human Brain! — sagardewan @ 7:17 am

Well its been long since I wrote something. Today sitting in the library feeling dizzy it occurred to me that I should write an article. Something which I wanted to do since long.
Well this one is on my dream and my personality and real world research :P
I dream to make Intelligent Machines which work just like the brains, inspired from my previous article.

I believe that most of the research in brain science can be done by just writing such blogs , coz there are so many open questions which will be answered only when people discuss about it. We need to study ourselves more and more rather than rats :P (kidding!)
Start:
I have been observing my close friends and many other people closely since few weeks, noticing a very common behavior which we call nervousness. I observed some guys touching their hair,ears while talking to a new girl(common for everyone), squeezing the fingers of both the hands together without any specific reason, vibrating their legs very fast, having a different(scared) expression, All these and many more which you also might have noticed in your real life and is not so easy to express here in this article. Strange huh?

Let’s talk about it in a more scientific way in this article.If you carefully observe when do you become nervous: When you meet a young/sexy counterpart, job interview, public presentations etc… The most obvious answer seems that its self conciousness, The feeling that what others are thinking about you makes you feel nervous, that is why most psychologists suggest that you should not be stressed and always have the attitude of “dont give a fuck about anyone ” to overcome this, some people also say that the main reason behind it is lack of self confidence, when we start thinking that “what the other person might be thinking about me” makes us feel even more concious.
Ok so its self conciousness or less confidence(I dont give a fuck), the question is why do we do these crazy gestures which make our nervous behavior so predictable?This happens coz your mind and your body are supposed to be in opposite phase e.g. You are tensed from inside but you have to show you are confident, just like the game of wolf, if you are the wolf, you have to act like you are not. The act of not showing what you are feeling from inside triggers this kind of random behaviour. Its this randomness which makes it so noticable.

I will give one more example. Assume that you are watching a movie for past one hour peacefully in you room at night 3am when everyone has slept. Suddenly a guy comes and shouts from your partially opened window. You will observe that for a second your breath will stop and it will take you 10-15s to recover and get hold of the situation. Lastly, the most important thing, you will always remember that incident :P

There is one common thing in both these instances, PREDICTION
If you carefully observe the first case: You become nervous coz of self conciousness(so what?) but you do those random gestures coz you have to decorrelate your mind and body(mind is fearful, tensed and worried, wheras body language should be confident). This type of situation is rarely experienced by the Human Brain.So it does not know how to react, coz its something it did not predict and is doing for the first time. So => random gestures
Second case: When a guy comes out of nowhere, for 10-15s you either become still or do random gestures coz you did not predict his arrival and your Brain does not know how to react.

More scientifically our Brain has a neuromodulator called dopamine which is released in such a case. Recent theory suggests that dopamine is responsible for learning in the brain and it is released only when there are prediction errors(Dopamine dependent plasticity)[I won't go in much detail coz of a mixed crowd], In short, you learn when there is a prediction error which is the reason why you will always remember that incident :P

Due to lack of time I cant spend time editing grammatical or spelling mistakes(Sorry!). Please fell free to comment.

Lastly,All the text is written from my own thoughts, I dont have any citations :P

January 13, 2010

The Human Brain

Filed under: Info on the Human Brain! — sagardewan @ 9:12 am

If you are planning to read it, I request you to go through it slowly, understanding every part.

I sometimes wonder about the gift given to us by Nature, i.e. The Brrrrain…

Have you ever appreciated the power of your Mind? Let’s get you started by thinking about the things you are capable of doing:

  • Your capability to learn things is remarkable. How do you learn to operate a computer without any prior training, Learning of Language, Understanding concepts, cycling, and many many other complicated Tasks without even noticing them, which any machine may/may not do with the help of infinite programmers and infinite complex mathematical equations
  • You can recognize someone by face, even if you met that person for a very short interval or saw him long back and mind you, you do all that in a fraction of a second. How do you traverse back in your memory to find that person, his characterstics, and EUREKA!!, You remember everything, how/where/when you met him. Extraordinary isn’t it?
  • Apart from that, you can label unseen objects as a table or a chair or anything else, despite of the fact that you never saw such a chair ever in your life. Noone taught you that its a chair, but what you saw was a similar kind of object with 4 legs used for sitting, using this analogy , you predicted that its a chair.
  • As I type here I see, that my typing speed has increased considerably over time. How did this happen, Am i learning the position of the keys without deliberately intending to do so? Or maybe its evolution? Like my brain thinks(:O) that this person is often going to use this keyboard so why not learn the positions so that his time is saved(not convinced?), Its in the analogy with evolution. The reason why our neocortex(Area of the Brain responsible for learning, intelligence and other hi-funda things) grew larger and larger over time.
  • Lastly something which everyone sees, perceives i.e Dreams, Even when you sleep, The brain stimulates your cells in such a way that it looks like real sometimes. Not exactly!!.. People have done research on sleep, Dreams. I will try to put it in the forthcoming posts. But one thing I would like to share: Dreams don’t have a meaning, so please don’t go looking for something called Meaning of my Dreams(A peek into the future)
  • There is an unending list of activities which your brain can do without you even noticing it or telling it to..

Trying to find some answers, such as :

What gives our Brain this power that a super-duper computer can’t even think of doing in its dream?

How is it wired up?

The answer might be hard, but we gotta start looking..

PS: I think that the Brain is a very precious gift bestowed on usĀ  by the nature, so respect it and value it.

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