Difficult to remember!!!

"Teacher i have read this answer twenty times, but still i cant remember the answer when you ask"!. This is the dialogue we here from few of us daily when we are in class. Actually we read and re read a chapter, yet we forget it after a while. This is due to lack of attention as the experience does not make a proper impression upon us.

Normally metabolic process of brain "memory trace" tends to fade or decay with the passage of time, unless we repeat it by repeating experience. If memory trace is left undisturbed it gets consolidated and can resist interference. During the process of consolidations however, the memory trace is still susceptible to interferences from material which are learnt subsequently.

Amazingly, it is been found that we forget less in sleep; while we are awake. Some of us read a book and go to sleep, and when we wake up early morning, we can regain certain stuffs which we read before we slept.
Thus all of us have a tendency to remember all the good ones and to forget the bad side of our lives.