Why is the dream that is still clear when you wake up so faded in an instant?

Everyone dreams when they sleep, so why do clear dreams disappear when they wake up?

For thousands of years, people have never interrupted the exploration of sleep and dreams, but they have never been able to find a way until the emergence of electroencephalogram, a sleep research artifact. According to the characteristics of the EEG, human sleep is divided into 4 stages (initially divided into 5 stages, and in 2007 the American Sleep Institute merged the original 3rd and 4th stages into a new 3rd stage).

The first and second stages are also commonly referred to as light sleep stages; The third stage is the slow-wave sleep stage, which is often referred to as the deep sleep stage. These three stages are collectively known as non-REM (rapid eye movement) sleep to correspond to REM (rapid eye movement) sleep stages.

Studies have known that human dreams occur mainly during the REM sleep phase. Moreover, the dreams of this sleep stage are "real" and vivid, with a strong sense of imagery, and can also be colorful, the story can also have plots and details, and some dreams can be accompanied by strong emotional reactions.

Although few sporadic dreams can occur during non-REM sleep stages, they are much more rigid, rough and blurry. If the dreams of the REM sleep stage are compared to a movie, then the dreams of the non-REM sleep stage are nothing more than scattered hazy **. Therefore, the dream that we wake up feeling "very real" should be the dream of the REM sleep stage.

In fact, not remembering or forgetting is the "correct posture" for humans to open their dreams - a person spends about 6 years of his life in a dreamland, how much can he really remember? Few and far between. Why is that?

This is actually a perfectly normal phenomenon - determined by the characteristics of human dreams and memories.

If awakened during a non-REM sleep phase, there will hardly be a dream; Even if there are a very small number of hazy scattered dreams, they will not form an impression, let alone be remembered.

Dreams are "inadvertently" synthesized from some originally irrelevant endogenous information of the neural memory network, very similar to flashing neon signs, this kind of dream information is only a flash, and most of them are not realized at all, will not be noticed (during sleep), and therefore will not form memories.

Because it has to do with the body's memory setting mechanism.

If it is forgotten in an instant, it must be that the memory disappears in an instant.

It may be that there is a problem with memory.

If you have a bad memory, you will definitely forget it.

Because I didn't have a memory at all, I didn't forget it.

It should be related to a mechanism in the human body.

Because it's just a dream.

This should be related to some mechanism in the human body, and it may be that there is a problem with memory.