Comment by bobbiechen

If you're interesting in learning more, Scott Alexander recently discussed research on this topic with a lot of links to papers: https://astralcodexten.substack.com/p/sleep-is-the-mate-of-d...

>But forget the practical side of this for now. It looks like sleep is somehow renewing these people's depressions. As if depression is caused by some injury during sleep, heals part of the way during an average day (or all the way during an extra-long day of sleep deprivation) and then the same injury gets re-inflicted during sleep the next night.