Why did you forget your dream so quickly?

The process of dreaming is mainly a process in which the cerebral cortex randomly selects all kinds of information in memory and combines them into conclusions. Senses below the cerebral cortex hardly participate, or the instant provision of one or two messages is inhibited. In this way, the content of dreams is not decomposed into more information and stored in new cortical cells. It will be even harder to find out in the future. But sometimes if you don't look for it, it will come back to life randomly.

This is the same as what you usually remember: if a thing contains information such as sight, hearing, taste, touch and emotion, every information may be the label of the next search, and this memory is easy to find out. Therefore, abstract things often feel "difficult to remember", in fact, it is difficult to find out from memory. Once someone says it, you will immediately say: Oh, I know this, but I can't find it.

Some dreams are like this. But some dreams cause other sensory impulses, so you can't forget this dream. Don't you remember the "dream of early spring"?