Why do we dream when we sleep? Analysis of the reasons for dreaming when we sleep

Dreaming is a normal and necessary physiological and psychological phenomenon of the human body. After a person falls asleep, a small number of brain cells are still active, which is the basis of dreams.

Normal dream activity is one of the important factors to ensure the normal vitality of the body. Dreams are a way to coordinate the balance of the human psychological world. Because the right cerebral hemisphere is dominant in dreams, and the left cerebral hemisphere is dominant after waking up, the alternation of waking and dreaming during the body's 24-hour day and night activities can achieve a dynamic balance between neural regulation and mental activity. Therefore, dreams are a way to coordinate the balance of the human psychological world, especially having a more obvious effect on people's attention, emotions and cognitive activities.

Dreamless sleep is not only of poor quality, but also a sign of brain damage or disease Recent research has also confirmed this point of view, namely, dreams are the result of the brain regulation center balancing various functions of the body, and dreams are necessary for healthy brain development and maintaining normal thinking. If the brain's regulatory center is damaged, dreams will not form, or only incomplete dream fragments will appear. If people experience dreamless sleep for a long time, it is worthy of people's vigilance.

Of course, if you have nightmares for a long time

It is often a sign of physical weakness or certain diseases.