Here's a question: If you are really, really tired, do you get less REM sleep? I'm asking this because i have jetlag after my flight back from america. On the way home from London on the coach, i kept nodding off, and the thing i noticed most (in spite of feeling rather out of it) was that i was slipping into HI far more readily than i would normally. Not only that, i was still conscious of my surroundings.
So, does being more tired automatically make for more intense HI, and less REM sleep?
I know i slept so deep last night that i didn't dream a thing.
Probably something to do with the fact that i hadn't slept in 24 hours.