The research, published in the Journal of Neuroscience, found that people who spent more time in rapid-eye-movement (REM) sleep — the phase when dreaming occurs — had lower fear-related brain activity when they were given mild electric shocks the next day. The findings suggest that getting sufficient REM sleep prior to fearful experiences may make a person less prone to developing post-traumatic stress disorder (PTSD), the authors hypothesize.
https://time.com/4970767/rem-sleep-dreams-health/
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