In the first ten minutes of sleep, it’s very light and you are very vulnerable to being disturbed by your roommate. This is the stage of sleep where people often get myoclonic jerks. After these ten minutes, we reach the second stage and brain waves are slowing down further. Noticeable effects of this stage are a slower heart rate, heavier breathing, and your body temp will decrease as well. Also, we go through K-Complexes with are sudden bursts of electrical brain activity. Next is stage three and four. This stage can last up to 30 minutes. The waves during this stage are called Delta Waves. This is where the bulk of our rest comes from. After this: the final stage is REM. REM stands for Rapid Eye Movement. This usually lasts 15-20 minutes.
