Question about rem periods

Hi all. I’m gonna try to wake up after a rem period for recall more dreams. Lets say that i go to bed at 12:00. My first rem period begin at 1:30 until 1:40 or 1:45 isn’t? So i put the alarm at 1:45. I wake up and write down my dream: this takes me 15 minutes. Now, the next rem period begin at 3:00 or 3:15 ?? That 15 minutes that takes me write my dream count?? I mean, when i wake up, i reset the cycle??

Thanks in advance!

No, the REM period is in the 90 minutes (at the end). So you should theoretically wake up at 1:30 to wake up at the end of your dream. But the first REM periods are short (they become longer every next cycle); it is better to wake up after the 3rd or 4th cycle: so at 4.30 or 6.00.

I think if you’ll be awaken for 15 minutes and then go to sleep, the next REM will end 15 minutes later, but I’m not sure about that.

You might find that useful: