Scientists at the University of Geneva used AI, fMRI, and EEG to decode brain activity during deep sleep, revealing that our brains replay and prioritize memories—especially those tied to rewards. This internal “memory sorting” helps us retain only the most valuable information. The study shows deep sleep is vital for emotional regulation and long-term memory consolidation.

Serotonin and Dopamine are the two neurotransmitters responsible for our moods, feelings of pleasure, and sense of well-being.