How can you say nightmares have nothing to do with REM sleep? If someone was dreaming(so generally during REM stage sleep)something unpleasant, then this tends to be classed as a nightmare. So I dont understand how you could say nightmares having nothing to do with REM sleep considering thats the stage of sleep they are mainly occuring in.
Anyway maybe some nightmares come about from palpitations but I doubt all nightmares come from that. I watched a horror movie the other night for example before bed and had a nightmare of being cut up into little pieces for what like felt hours(like going through a wire mesh). It was so long that I ended up getting used to it, it was one of those dreams you cant get out of and just keep dreaming. And I hadnt had any nightmares during the week or for quite some time(I dont remember a nightmare before it) so it seems to point to the movie that triggered it.
And after that dream on the same night I went lucid and flew around in a cross position(for some reason) saying "Ariel" and the one time I mispronounced the name I fell from the sky. And when I corrected myself and pronounced it correctly again, I flew back up into the air.
So I'm not sure how that all fits in with this view(from the OP). But yes I can understand how the body can create certain dreams.
Edited by Kazahel, 26 February 2013 - 03:04 PM.