Sleep is a essential part of life. For many, it is an enjoyable necessity. During sleep, we get the rest we need to conquer another day. Though sleep seems like a basic concept, the sleep cycle is complex in nature.
Sleep can be divided into three phases: light sleep, deep sleep, and REM sleep. Within the phases of the sleep cycle are distinctive stages, including non-rapid eye movement (known as NREM) and rapid-eye movement (REM) sleep. Sleep phases run in a continuous cycle of light sleep followed by deep sleep and finally REM sleep. These cycle repeat themselves approximately 5 times during the sleeping period.
Light sleep occurs right after a person falls asleep. Lasting anywhere between 1 and 7 minutes, this is the best cycle to awaken in as it will give the best feeling of wakefulness and energy. Your body still remains active in this phase, therefore body movements such as twitching can occur.
Deep sleep is a vital aspect of the sleep cycle. This is when both your body and brain function are slowed down. During deep sleep, cells regenerate, your bones and tissue are repaired, and your brain function is enhanced through a variety of electro and chemical processes.
In REM sleep, your brain takes center stage. Body activity decreases dramatically and this when when limbs become temporary paralyzed. During the REM phase, individuals tend to have very vivid and intense dreams, also memories, learning and emotions are created and stored during this time.