While experiencing good sleep, I will unconsciously pass through five stages: 1, 2, 3, 4 and REM sleep (citation). According to the PL100 text, these stages progress cyclically from 1 through REM then begin again with stage 1, and usually,
One of the most recent explanations for why we sleep is the brain plasticity theory. This is based on findings that sleep is connected to changes in the structure and organization of the brain. This phenomenon is still not completely understood, but its connection to sleep has many critical implications. It has been known, for example, that sleep plays a crucial part in the development of infant's brains. Infants spend about fourteen hours a day sleeping. A connection between sleep and brain plasticity is becoming clear in adults as well. This is seen in the effects sleep have on people's ability to learn.
Consciousness is your awakened state of mind in which you are cognizant of and are able to distinguish between realities while also being preemptive to one’s thoughts, emotions, and feelings through the establishment of the fundamental aspect of student-object relationships in which one is not only aware and mindful of his surroundings, but oneself as well at any given moment as the present renders sentiments of familiarity, presumably rectifying preconceived notions that consciousness is merely an illusion and is rather more so a universal force and a collective body of existence and self-realization.
Thesis: Sleep plays an essential part in a person’s health and well-being; the way we feel while awake is dependent upon what happens to your body while asleep.
Then you will move into stage two which includes sleep spindles and K complexes. Sleep spindles are very short bursts of brain activity, and K complexes are single high voltage strikes of brain activity. Also, in stage two delta brain waves start to slow function of the brain preparing for stage three and four. Stage three and stage four i will talk about as one because they are very similar and do similar things. These stages are referred to slow wave sleep because your brain is in it’s slowest speed of function. In stage three you brain is between 20 and 50 percent delta waves, from 50 to 100 percent delta waves you are considered to be in stage four. While in stage four people may experience sleep walking and other muscular movement without knowing so. Noises as loud as 90 decibels may not be able to wake the person from sleep. During REM sleep which is after NREM sleep the brain is more active and alert. This is where most dreams occur because your brain is active but you are still sleeping. After the short 15 minute period of REM sleep you will start over with stage one of NREM these cycles normally take 90 minutes to complete. Activity during sleep can come at any point but is most common in REM or stage four of
Sleep is one of the unavoidable daily-living activities and it is one of the most important factors contributing to a person’s health. A quality sleep is essential for the physical, cognitive and psychological well-being of a person. Learning, memory processing and maintenance of the brain are among the most important functions of sleep. In addition to maintaining the brain, sleep has important roles in controlling the
However compared to the other development groups of life the adulthood stage was the period in which adults only needed seven to nine hours of sleep. Sleeping disorders are common for adults. Adult with issues to sleep are no benefiting enough as people who do since it improves their neurocognitive functions. A study was done to compare the sleep architecture of young and older adults. The study viewed the emphasis on REM and sleep spindle density. Another objective studied in this experiment
While awake, beta waves are active in the brain. The first stage is known as REM. This is where rapid eye movement occurs. As well, dreams typically occur here. As you begin to fall asleep these beta waves become less prevalent and theta waves start to develop. This occurs in the early stages of sleep. Furthermore, this stage is known as N1 which is a light sleep that usually occurs for about five minutes. During this time body temperature drops and shallow, irregular breathing occurs. The next stage is known as N2. An EEG would show sleep spindles at this point. As time goes on the brain will begin to produce delta waves. These waves are long and slow. They occur in the deepest stages of sleep known as N3. This stage is also responsible for growth hormones being released in the pituitary gland. After N3 the body will begin to wake up on its own. The body will return to it's REM stage where body temperature increases and eyes have movement.
Importantly, it was observed that each recovery sleep dose had equivalent restorative value (i.e. linear) for sleep and objective sleepiness measures. However in contrast, recovery of neurobehavioral outcomes, sustained attention and subjective sleepiness, was exponential indicating that the restorative value of the recovery sleep doses decreased with increasing sleep
Sleep is undoubtedly one of the most essential requirements for the human body to function properly. It plays a very important role in ensuring the wellness of the human body both physically as well as mentally. In fact, the importance of sleep is clear from the fact that it helps you in maintaining a good lifestyle throughout our entire lifetime. Not only does it help maintain our physical and mental health; rather it also helps in maintaining a decent and healthy lifestyle along with ensuring safety from a number of fatal diseases. It is usually said that the mood in which you wake up is largely dependent on the type of sleep you have been in. This in itself is a big proof of the importance of sleep in our lives. While sleeping, our body finally gets its share of rest and it also gets ample time in rejuvenating from all the wear and tear that it went through during the entire day. Not only this, the body is in its own working condition when we are sleeping as this is the time when it supports the healthy functioning of the brain as well as physical attributes of our body.
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).
Stage 2 is the K complex. These are sharp waves that happen at least once a minute. This stage characterizes the first stage of sleep. Stage 2 has an appearance of spindles (Thien Thanh Dang-Vu, 2017). Where the waves have a gating function that help to prevent the unsettling stimuli from reaching the cortex part of the brain that will in turn awaken the sleeper.
Contrary to popular belief, the amount of sleep a person needs does not decrease with age. The reality is that sleep patterns and circadian rhythms change as one ages. Infants spend 50% of their sleep time in non-REM sleep and 50% in REM sleep; it has been shown that deep sleep coincides with the release of growth hormones, necessary for growing children. Adults spend approximately 20% in REM sleep, while elderly people may spend only 15% in REM sleep. Older adults tend to spend most of their sleep time in Stage 1 of non-REM sleep. Consequently, they have less REM sleep and report frequent awakenings.