why do we dream? what is the cause of dreams ?
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Answer:
The scientific study of dreams is called oneirology. Dreams mainly occur in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep.
Most dreaming occurs during REM (rapid eye movement) sleep, which we cycle through periodically during the night. Sleep studies show our brainwaves are almost as active during REM cycles as they are when we're awake. Experts believe the brainstem generates REM sleep and the forebrain generates dreams.Dreams appear to be influenced by our waking lives in many ways. Theories about why we dream include those that suggest dreaming is a means by which the brain processes emotions, stimuli, memories, and information that's been absorbed throughout the waking day. ... Pregnant women dream more about pregnancy and childbirth.The theory states that dreams don't actually mean anything. Instead they're merely electrical brain impulses that pull random thoughts and imagery from our memories. ... This is why Freud studied dreams to understand the unconscious mind. Therefore, according to Freud, your dreams reveal your repressed wishes to you.