Sleep And Non Rem Sleep

Sleep is a complex mysterious phenomenon that we don’t know much about including why we dream and different actions associated with lack of sleep like yawning or illness, but there are many theories as to why these things occur along with facts. Why do we dream or have nightmares? What is the point to these things and how do they contribute to our health? Scientists are doing their best to research these things but sleep and things related to it are very mysterious and many things are still left unsolved. There are also many disorders and illnesses connected to the need for sleep and sleep itself, including sleepwalking, sleep apnea, snoring, yawning, dreaming, nightmares, and other various things.

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).

For some, sleep may seem like wasted hours of doing nothing, and for others, it’s a reward for when all our important work is finally complete. However, the value of getting a good night’s sleep is often misunderstood as it’s a critical moment in which our body balances and regulates our vital systems. Instead of cramming to until 4 in the morning to study and forcing yourself to stay away with an extra cup of coffee, it’s best to close your eyes and get some sleep as it allows your body to regenerate itself. Many are unaware of how crucial sleep is to your brain as it affects everything from your respiratory system to your ability to recall information. Marcu explains how sleep restructures your brain in a way that’s necessary for how our

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.

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.

In these stages, we are in our deepest realm of sleep. While we are in these stages we become even more out of contact with the outside world and we become unaware of anything going on. Our heart rate, breathing rate, and blood pressure drop to its lowest levels. Stage three and four are made up of delta waves with a frequency of around 0.5-4 Hz ( “What Happens When You Sleep?” 2016) . There is also some sleep spindles that occur during this time but they are a less prominent here in stage these two stages than it is in stage two . While we are at this stage if something were to come about and wake us up since we are our deepest sleep it takes the body and the brain some time to be reaccumulated with the outside world; we tend to be really groggy and “ill” once we awaken as well. One very interesting thing that comes out of this stage is as children we tend to have many of our occurrences of bedwetting, sleepwalking, and sleep, terrors. ( “What Happens When You Sleep?”

Stage 1 of NREM is the lightest sleep, it lasts about 10 minutes and is presents only 5% of our total sleep time. During this stage we are transitioning from being awake to falling asleep. Our eyes move slowly as well as brain waves and muscle activity begins to decrease. Many people who are in this stage may also experience hypnic myoclonia; sudden muscle contractions. Following stage 1 is stage 2 a deeper sleep, because a person passes through this stage many times it accounts for 50% of our total sleep. When entering stage 2 eye movement stops, heart rate slows, and brain activity decreases, with occasional rapid waves called sleep spindles. Stage 3 and stage 4 is a deep sleep, it is the most difficult to awaken someone from this stage. These stages are often called “slow wave sleep” (SWS) or “delta sleep”. Stage 3 and 4 are characterized by delta waves, which are very slow brain waves with a high amplitude, there is no eye movement or muscle activity and both temperature and blood pressure decreases. Children might experience night terrors, and bedwetting during SWS, and those who wake up from SWS often feel confused and disoriented for several

The next stage in the Non-REM sleep is the N2(R&K Stage 2). At this point a person’s body temperature will start to decrease along with a slowing heart rate. Sleep spindles, which are quick movements of activity of the brain

Sleep impacts physical and mental health. We need it to ensure proper mind and body development. Sound sleep is also crucial for our body

During sleep your brain never totally sleeps stage (1) this is the lightest stage of sleep. Is a transition from wakefulness to sleep and last 1-7 minutes. Stage (2) this is the stage of what researchers call real sleep. As you pass through stage 2 your muscle, tension heart rate respiration and body temperature gradually decrease and it becomes more difficult for you to be awakened stages (3and4) about 30 to 45 minutes after drifting off into sleep you pass through stage 3 and enter into stage 4. Stage 3 is when you begin showing some presence of slow brain. Wave patterns called delta waves. When you begin to show an increased presence of delta waves you have entered stage 4 of sleep. This is characterized by consistent pattern of delta waves. This is considered the deepest state of sleep. It is the most difficult form which to be awakened during stage 4 heart rate, respiration, temperature and blood flow to the brain are reduced and there is a marked secretion of GH hormone which controls levels of metabolism, physical growth and brain development. After you spend a few minutes to an hour in stage 4 you go back to stages 3 and 2 and then pass into a new stage called REM which is associated with dreaming that I already mentioned. Because it is really fascinating to me. A short time after awakening from sleep you enter a state of being awakened alert this state has a distinctive brain activity called betta waves since they are characterized by high frequency and low amplitude how alert you feel in the morning depends partly on whether you are a morning person or an evening

Alone it makes up 50% of one sleep cycle. Unlike stage one and stage three, this stage is always half of the sleep cycle. This is what doctors consider to be the “deep sleep” stage. Here, all eye and muscle movements stop, creating a peaceful slumber that results in heavy breathing, or snoring. While this is the longest stage, it is where people receive most of their rest of the night. Also during this stage does the brain activity slow, again creating the ability to have deep, tranquilized sleep. It is recommended to not disturb the sleeping person, as it creates a disoriented person and is difficult to continue the cycle once awoken. Sleeping tests have resulted in doctors noticing a possible infrequent burst of brain activity occurring during this stage, although, as stated before, it is very infrequent and is nothing to be concerned with. No dreaming happens during this

During stage 2 sleep most of the time people become less aware of their surroundings and body temperature drops. Second stage of sleep lasts about 20 minutes. During stage 3 sleep your muscles are

The majority of people have heard of REM sleep, but do not know much about it. It happens in cycles of about 90-120 minutes during our sleep and it makes up about 20-25% of an adults sleep time, but the amount of time we spend in the REM sleep cycle lowers the older we get. The brain cycles through five different phases during sleep: stages 1,2,3,4 (which are classified by their respective brain wave patterns) and REM sleep. The sleep cycle repeats itself, so one enters REM sleep several times a night. ("What Is REM Sleep?") .

Sleep affects our daily life. Students who are sleep-deprived are very likely to have problems in school. A child might fall asleep in class or have attention and/or concentration issues. He or she might be cranky and difficult to manage because of troubled sleep. Sleeping disorders can also cause a variety of health problems. It's a topic worth discussing for those reasons, but also a good opportunity to learn about the science and mystery of sleep.

Every living organism needs to rest, starting from the animal kingdom to humans. All of them need to sleep as a need for food, it is a necessity for life. Sleep is important and necessary for human health and its ability to engage in intellectual activity and mental fitness. Everyone needs to sleep, one of the basics of life. Humans spend almost half of lifetime sleeping and then have to know how to keep the body in a good sleeping time. Many of the physical problems can interfere with the ability to fall or stay asleep. Sleep is important; because it helps human to boost’s memory, being active, reduce the chronic inflammations, and mean the weight. Although, there are many disorders that may interfere with person’s sleep.