If sleep continues uninterrupted, the neural patterns associated with the dream dissipate, and the memory fades before consciousness fully returns. Therefore, the brain is engaged in dream-like activity, to some degree, for a significant portion of the night.
The Mystery of Whether People Dream Every Night
Neurochemical factors play a significant role in this forgetting. However, dreaming is not confined to REM.
During REM sleep, levels of norepinephrine—a brain chemical associated with memory formation—are extremely low. Research indicates that subtle forms of dreaming, often involving more static imagery or emotions, can also occur during NREM sleep, particularly in the lighter stages.
The Mystery of Whether People Dream Every Night
Some people are naturally prone to remembering their dreams, often because they wake up naturally during or immediately after a REM phase. During REM sleep, levels of norepinephrine—a brain chemical associated with memory formation—are extremely low.
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