By the time, we finish all our chores and hit the bed for a sound night’s sleep, we’re extremely tired. All we will need is some tranquil rest that would re- energize us enough to awaken feeling invigorated the following morning.
As you lie down and close your eyes, in pursuing sleep, the silence of the surroundings, the chilled off temperature and the obscured air hypnotize you and migrates you to a universe of fantasy.
As you enter the realm of sleep, you cruise through various stages of sleep, from being wakeful to a lighter sleep, to deep sleep, and from deep sleep to REM Sleep when dreams start wafting through.
Over the course of the night, your sleep cycle is made up of several rounds of sleep. Cycles of sleep involve Non-REM & REM stages of Sleep. During the Rapid Eye Movement in Sleep or Rapid Eye Movement rem stage, you will be in a state of deep slumber. You enter this realm after passing through a couple of Non- REM stages of sleep, where your sleep consolidates. Your eyes move rapidly from side to side behind the closed eyelids. Mixed frequency brain wave activity becomes closer to that seen in wakefulness. Your breathing becomes faster and irregular, and your heart rate and blood Your breathing turns out to be quicker and sporadic, and your pulse and circulatory strain increment to approach waking levels. Most of your dreaming happens during REM rest, albeit some can likewise happen in non-REM rest. Your arm and leg muscles become briefly incapacitated, which keeps you from carrying on your fantasies.
Typically, a person goes through four to six sleep cycles. Not all sleep cycles are of the same length but on average, they last for about 90 minutes each.
Sleep is an important part of your daily routine—you spend about one-third of your time doing it. Quality sleep–and getting enough of it at the right times — is as essential to survival as food and water.