Why do we dream when we sleep?

What Is A Dream?

Dreams are a series of images, thoughts, emotions, and feelings, which usually appear in mind involuntarily during certain stages of sleep. The content and function of dreams are not yet fully understood, although they have been topics of scientific, philosophical, and religious interest throughout recorded history. Dream interpretation is an attempt to extract meaning from dreams and find potential information. The scientific research of dreams is called oneirology.

Dreams mainly occur during the rapid eye movement (REM) phase of sleep, when the brain is active, similar to when awake. REM sleep is revealed by the continuous movement of the eyes during sleep. Sometimes, dreams may occur in other stages of sleep. However, these dreams are often not so vivid or memorable. The length of dreams can vary; they may last a few seconds or about 20-30 minutes. If people are awakened during the REM stage, they are more likely to remember the dream. The average person has three to five dreams every night, and some people may have seven; However, most dreams are forgotten immediately or soon. As the night progresses, dreams tend to last longer. During the full eight hours of night sleep, most dreams occur during the typical two-hour rapid eye movement. Dreams related to waking life experiences are related to REM theta activity, suggesting that emotional memory processing occurs during REM sleep.https://en.m.wikipedia.org/wiki/Dream

Why do we dream when we sleep?

Dr. Butler says there are many scientific theories for why we dream:

1.Activation synthesis theory:

According to psychiatrists at Harvard University, this theory suggests that dreams occur when stimuli in the brain bring thoughts into our consciousness. "The activation-synthesis hypothesis suggests that dreams are caused by brain stem activation and limbic system (emotional motor system) stimulation during rapid eye movement (REM) sleep," she said.

2.Threat Simulation Theory:

This theory is based on the work of Finnish cognitive neuroscientists and psychologists and shows that dreaming is preparation for real-life situations that may pose a threat.

3.The biological response to the living environment:

"A researcher studied why people have dreams with negative content, especially dreams involving attackers or enemies," she said. "This may be an evolutionary and biological response, and it may be based on different life experiences."

4.Organization of knowledge and memory:

"Research published in 1985 showed that the purpose of dreams is to organize knowledge and form brain connections, which contributes to memory recall," said Dr. Butler. "This theory suggests that dreaming is an opportunity for the brain to solve problems, make decisions, and set priorities."https://www.medicalnewstoday.com/articles/284378#causes

What is the reason for dreams??

There are several theories about why we dream. Dreams are only part of the sleep cycle, or are there other uses?

Possible explanations include:

Represents unconscious desires and wishes
Interpretation of random signals from the brain and body during sleep
Consolidate and process information collected during the daytime.
Work as a form of psychotherapy.

Quick facts about dreams

We may not remember dreaming, but people think everyone will have 3 to 6 dreams every night. It is believed that each dream lasts 5 to 20 minutes. About 95% of dreams are forgotten when a person wakes up. Dreaming can help you learn and develop long-term memory. Compared with people with normal vision, blind people have more dreams about other sensory components.https://www.healthline.com/health/.