Sleep Cycle Stages

Sleep is a state of altered consciousness, characterized by certain patterns of the brains activity and inactivity. An altered state of consciousness is when a person is not completely aware of their surroundings. Some researchers believe that we sleep to clear our minds of useless information. Other people believe that it is a type of primitive hibernation: we sleep to conserve energy.

The stages of sleep can be broken down into two broad categories: non-REM and REM sleep. Non-REM (rapid eye movement) sleep can be further broken down into four more stages - stages 1-4.

If this cycle is broken during a night's sleep the body will be unable to function properly. A sleep schedule is the biological rhythms of the body. It generally occurs for appoximately seven hours

It is said that the average sleep time in adults, ranges from 7 hours to 9 hours. But how much do sleep patterns change over an adult's lifespan? Judd (2010) focuses on the sleep overview in children throughout their infancy until their teen years. Secondly, Wrzus et al. (2014) investigate the correlation between sleep duration and well-being in adolescents and adults. Wilckens et al. (2014) examine the association of sleep continuity and cognitive function in young and older adults. However, Millman (2012) analyzes sleep deprivations in older adults (over age 65). English (n.d.) provides an overview of how sleep changes in people's lifetime. Altogether, the changes in sleep patterns are reflected in each age range in the life of the human

Fifth Stage REM Rapid-Eye-Movement Sleep, while in REM breathing rates, brain activity increases and decreases, and brain waves are faster and smaller. Paradoxical sleep or active sleep refer to REM the reason for this is because brain, body become heightened and muscle movements are restrained but can twitch this is so dreams are not acted out. REM can last for up to fifteen min. From stage one NREM to REM sleep has taken about ninety min. For the rest of the night’s sleep cycle, it bounces between NREM and REM.

The stages of non-REM sleep, stages 1–3, are defined by EEG activity. Slow-wave sleep in stage 3 is the deepest stage of sleep. Alertness consists of desynchronized beta activity (13–30 Hz); relaxation and drowsiness consist of alpha activity (8–12 Hz); stage 1 sleep consists of alternating periods of alpha activity, irregular fast activity, and theta activity (3.5–7.5 Hz); the EEG of stage 2 sleep lacks alpha activity but contains sleep spindles (short periods of 12–14 Hz activity) and occasional K complexes; stage 3 sleep primarily consists of delta activity. About 90 minutes after the beginning of sleep, people enter REM sleep. Thereafter, cycles of REM and non-REM sleep occur in periods of approximately 90 minutes. Muscle tone decreases throughout the stages, resulting in deepest relaxation and paralysis in REM sleep (Carlson & Birkett, p. 268).

There are five basic stages in cycles I go thought when I am going sleep though out the night. Stage one, which lasts about five minutes, my brain waives becomes slower and irregular. Then I would go in to stage two, which lasts around ten to twenty minutes, I would have a regular EEG and less then 50 percent of this time is spent in this stage. Stage three is a short transition, which is made up of twenty to fifty percent delta waves. Stage four is around fifteen to twenty minutes, in this stage I have less than fifty percent delta waves and it is where I get the deepest sleep. Then I would cycle back through stages three and two before I enter into stage five. In stage five, which is called REM, which last ten to twenty minutes and I will

Sleep consists of many different 90-minute cycles. These cycles are: alpha waves, NREM-1, NREM-2, NREM-3, and REM sleep. The first stage of sleep is known as the alpha waves. Alpha waves are “relatively slow brain waves of a relaxed, awake state” (Myers, 2017, p. 55). During the alpha waves stage the person is not yet asleep, but is laying calmly with his or her eyes closed. Eventually the person falls asleep, without being consciously aware of it, and moves into stage two of sleep.

A normal night's sleep is when a person successfully goes through all five stages of sleeping. The first stage is when you are lightly sleeping and muscle activity starts slowing down a little. You then start slowing your breathing and heart rate down, as well as your body temperature. The 3rd stage is what is called deep sleep. Deep sleep is whenever your brain start to generate delta waves. The next stage is number 4. This stage is whenever your body is in a very deep sleep and your brain is producing delta waves. The last stage of sleep is the 5th. While in this stage a person may start having rapid eye movement. This is also the stage wear dreaming occurs. It is always important to get a good and full night's rest. Not sleeping can cause

Entering the second hour of sleep, brain wave activity increases and the individual enters into the first REM sleep (rapid-eye-movement sleep) period. The cycle of NREM and REM sleep is repeated throughout the night, with each REM cycle becoming longer and each NREM less deep.

Sleep is composed of five different cycles, each cycle lasts for about 90 minutes. It is consists of two main broad stages, the first four cycles is known as non- rapid eye movement (NREM) and the last stage of the cycle is denoted by rapid eye movement (REM) sleep.

The average person need around seven or eight hours of sleep. We go through five stages of sleep, if you include REM. Each stage of sleep lasts a couple of minutes, and continues to route from stage to stage throughout the night. As a person transitions to a deeper stage of sleep the wave pattern is slower and more regulated. Rapid Eye Movement, also known as Rem sleep, is the stage of sleep where most of dreams take place. For many of us sleep is just another part of the day, but there are many diseases that make finding sleep for others very difficult. Insomnia is one of these diseases, and it causes a person trouble finding or staying asleep. Sleep Apnea is possibly one of the most serious sleep disorders, because it causes stop while a

This stage is believed to help people enter deeper stages of sleep (4). Stage 3 sleep consists of 20-50 percent delta activity and stage 4 sleep of more than 50 percents delta activity (4). Stages 3 and 4 are characterized as being slow wave sleep in addition to being the deepest levels of sleep. Approximately 90 minutes after being asleep, people enter rapid-eye-movement (REM) sleep (4). REM sleep consists of rapid eye movements, a desynchronized EEG, sensitivity to external stimulation, muscle paralysis and dreaming (4).

Throughout the night most people do not even notice all the different stages of sleep that they go into without even thinking about it. In an entire night of sleep a person goes through four different stages of sleep. When a person first lies down before their body even reaches the first level of sleep they lay there in a relaxed state slowing all of their natural body activities In the first actual

A typical night’s sleep is much more complicated than just closing your eyes and waking in the morning. As humans, we live our life on a circadian rhythm. This means that changes occur roughly based upon a 24-hour basis. This circadian rhythm plays a major role in when we get tired and decide it’s time to sleep. This rhythm is theorized to have helped us stay safe thousands of years ago. We would fall asleep during the time that their seemed to be threats roaming around in the dark. to Once we finally get to sleep, our brains and bodies are doing much more than laying in complete stillness. There are five distinct stages of sleep that we experience as we sleep. Each is uniquely different and serves a purpose throughout the night. The first stage of sleep is a very light sleep that lasts for 5 to 10 minutes. During this stage of sleep, you may not even realize that you’re sleeping. While in this stage of sleep our brains power down by 50 percent and produce theta waves four to seven times per second. We proceed to stage two after this. During stage two, our brains power down