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Stages of sleep one to four

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    Grace W.
    UY
    Grace W.

    great

    LAWRENCE M.
    NG
    LAWRENCE M.

    Once the sleeper reaches stage four (about an hour after sleep begins) they then travel back up through stages three, two and one. When stage one is reached for the second time, REM sleep begins and the sleeper engages in about ten minutes of dreaming.

    Peter Awuni A.
    GH
    Peter Awuni A.

    From the lay point, when others are deep at sleep and somebody walks pass, stand close or even noise, he /she immediately wake up without a touch, why

    Tamekia Dominquie T.
    US
    Tamekia Dominquie T.

    The body requires more rest as a person gets older. When the body does not get the proper rest it needs if will shut down.

    Odongo M.
    UG
    Odongo M.

    Psychology -> Stages of sleep one to four Stages of sleep one to four Stage one: This stage is characterised by small, irregular waves which are a combination of alpha and theta waves. During this stage the individual is drowsy and is drifting off into a light sleep from which they can be easily awoken. The person's heart rate slows down and their muscles relax. Apart from the very first time the person enters stage one sleep, this stage is known as REM sleep. Stage two: In this stage sleep spindles begin to occur. These are sharply pointed waves recorded by the EEG. The EEG also shows rapid bursts of electrical activity with irregular brain waves. Stage three: This stage is characterised by the onset of slower delta waves.These brain waves are high in amplitude and low in frequency. At this stage, the person becomes harder to awaken, their breathing and pulse rate slow down and their temperature drops. Stage four: This stage consists of pure delta waves and it is extremely difficult to rouse the sleeper. This is the stage when sleep walking, sleep talking and night terrors occur. Once the sleeper reaches stage four (about an hour after sleep begins) they then travel back up through stages three, two and one. When stage one is reached for the second time, REM sleep begins and the sleeper engages in about ten minutes of dreaming. Most dreams occur during this REM stage. The EEG reveals brain wave patterns that are very similar to beta waves when a person is awake, active and alert. For this reason, REM sleep has been called 'paradoxical sleep'. It is also characterised by jerky movements of the eyes beneath the eyelids, hence the label, rapid eye movement. The person's heart rate also increases, their blood pressure rises and their breathing becomes faster and more irregular. Luckily for others, our muscles are paralysed, preventing us from acting out our dreams. As the night progresses, the time spent in stages three and four decreases while REM sleep increases. The last stages or REM sleep can last up to one hour or so. The entire cycle of stages one through to four occurs approximately four to six times during an average eight hour period of sleep.

    Eluk M.
    UG
    Eluk M.

    is it upnormal if some one rearly dream ?why are some dreams associated with talk?what is the different between night mayor and dream .

    Bliss  M.
    US
    Bliss M.

    I wonder if there is a effect on the individual if they are sleeping in a bed alone, or with their significant other. If there have been studies done on weather people enter sleep stages, and go through cycles faster, or slower depending on if the individual is sleeping alone, or with a significant partner. Would be a interesting study given that the individual being studied had no physical interactions with the person sleeping next to them. I think the outcome would be that individuals fall asleep faster when they are sleeping next to those how make them feel comfort. This might also determine weather the couples are good or bad for each other, because it doesn't help that sleep can be effected by those that keep the individual awake, or awaken the individual... interesting ponder.

    Enemchukwu E.
    NG
    Enemchukwu E.

    Ok

    EUSTACHIUS KEPHAS I.
    NG
    EUSTACHIUS KEPHAS I.

    Sleep is really an oscillation movement in the organisms life just like that of the simple harmonic motion (to and from). So this is the reason why at times it is difficult to wake someone up from sleep especially towards the morning hours while it is more easier to wake during the day. though at times it is the other way round

    EUSTACHIUS KEPHAS I.
    NG
    EUSTACHIUS KEPHAS I.

    How many hours of sleep is required of a normal organism?

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