Originally posted by Tsen+--><div class='quotetop'>QUOTE(Tsen)</div>
I could be wrong, but I'm fairly sure that you go through REM all night long. It's just more frequent after several hours of sleep.[/b]
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...And Tsen I don't think you hit you're first REM period until 90 min into sleep.
REM sleep is more than rapid eye movement, it was just named that way for what happens, I guess. It's characterized otherwise by your brainwaves (alpha? I can't remember which), being that they are extremely similar to that of being awake. It's the last(fifth), deepest stage of sleep that's been catagorized as far as I know.

I just hate having loose ends in posts :]