Per [[Why We Sleep]] - REM sleep & dreaming have (probably)[^1] the following functions: - Making connections between disparate experiences and concepts - Paul McCartney wrote the melody to "Yesterday" while sleeping - Keith Richards claims to have recorded the opening riff to "Satisfaction" during his sleep, literally - Dreaming may separate emotion from emotionally charged memories - helping alleviate PTSD - Thomas Edison and Salvador Dali both set up schemes to wake themselves up just as they were falling asleep so they could write down what they **** # More ## Source - [[Why We Sleep]] [^1]: I couldn't decide if the book suggests these are just theories or if they are being posed as more forceful "facts"