Rapid eye movement (REM) sleep is characterized by darting movements of the eyes under closed eyelids. Sleep can be divided into two different general phases: REM sleep and non-REM (NREM) sleep. These changes in brain wave activity can be visualized using EEG and are distinguished from one another by both the frequency and amplitude of brain waves (figure below). Instead, sleep is composed of several different stages that can be differentiated from one another by the patterns of brain wave activity that occur during each stage. Understand the role that REM and non-REM sleep play in learning and memory.Describe the differences between the four stages of non-REM sleep.Differentiate between REM and non-REM sleep.Dreams are more vivid during REM sleep.By the end of this section, you will be able to:.It is harder to wake a person up from a deep sleep than REM sleep.Deep sleep means an even and deep breathing pattern. This is the easiest way to tell between REM and deep sleep. To make differentiating easier here are some facts to remember: This is understandable since REM sleep is also considered as the deepest sleep. Deep SleepĮven after learning about the different stages of the cycle, some may still find it hard to determine the differences of REM Sleep Vs. This stage becomes longer as the night progresses, reaching up to 1 hour.Breathing and heart rhythms are usually irregular.Vivid dreams are common during this stage.The eyes move rapidly in all directions.Most bedwetting and sleepwalking occurs during this stage.Happens usually after 90 minutes of sleep.Although the name may be misleading, thinking that this stage is where you are alert due to the eye movement it is actually the deepest stage of sleep. The REM or the rapid eye movement stage of the sleep cycle is the fourth and final stage which lasts around 10 minutes. This stage is also known as the “slow-wave sleep” or “Delta sleep”.Waking up at this stage can result in a disoriented feeling.People at this stage sleep through usual sleep disturbances.Studies have shown brain waves to slow down and become significantly larger at this stage.Typically occurs 35-45 minutes after sleep settles in.This stage is considered the most crucial stage of the sleep cycle as the body is at full rest and at this stage, the rebuilding of cells is at its most prominent. Stage 1 and 2 of the sleep cycle are normally called the “light sleep stages”.Ī person entering the deep sleep stage will be considered as fully unconscious and will not be able to respond to external noises quickly.Brains at this stage of sleep emit larger brain waves.The body prepares itself for the deep sleep stage by further slowing down your heart rate and decreasing your body temperature.Longest sleep stage, around 45% of sleeping time is spent on stage 2.Learn More Features and facts about Stage 2: During this stage, it is common for the muscle functions to decrease and for breathing to even out. While Stage 1 is referred to as the beginning of sleep, Stage 2 is when actual sleep sets in. Hypnic jerks commonly happen to people with irregular sleeping patterns.At this stage the hypnic jerk or the sensation of falling commonly occurs.Blood pressure and brain temperature go.The breathing begins to slow down and the heart rate slowly becomes regular.Your eyes may slightly roll and your eyelids may be partly open.Even if it is considered sleeping, you may feel like you have not fallen asleep yet.During this stage, a person can easily be roused back into being fully awake. This stage can last 1 – 10 minutes, depending on the person’s wakefulness. This happens when you have decided to close your eyes and sleep. This is the first stage of sleep our bodies enter. Here are the 4 Stages of the sleep cycle and their identifying traits: Stage 1: NREM (Non-Rapid Eye Movement) 1 To give you the opportunity to fully understand the sleep cycle, learning to differentiate the different stages of sleep is the first step. These two are commonly associated with each other or are thought of as the same, which is a common misconception we will discuss here. What many do not know is that there are different stages of sleep, all of which play an important part in giving us a peaceful and restful sleep.Īlthough many are familiar with the different terms associated with the sleep cycle like REM and Non-REM, most do not know the facts behind REM Sleep Vs. For many people, sleep is simply defined as the time where we go to bed and rest for the night.
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