Feel for 10 secondsâ has been removed from the CPR sequence so chest compres-. sions can begin as soon as possible. No change in CPR sequence for drowning: after assessing for breathing, rescuers. deliver two initial rescue breaths followed by 30 chest compressions.
During REM sleep, your brain and body are energized and dreaming occurs. REM is thought to be involved in the process of storing memories, learning, and balancing your mood, although the exact mechanisms are not well understood. REM sleep begins in response to signals sent to and from different regions of the brain.
Your body is more or less paralysed, but your eyes move rapidly. Interestingly enough, while your brain waves frequency is much higher than it was when you were in the deep sleep phase, it's even harder to wake you up. After some time in the dreaming REM phase you fall back into deeper sleep and the cycle repeats. Usually each cycle takes about 90 minutes. When the alarm clock wakes us up suddenly from deep sleep or interrupts the REM phase, our body doesn't appreciate it.