Getting a good night's sleep

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Sleep 101 When you sleep, your body rests and restores its energy levels. However, sleep is an active state that affects both your physical and mental well-being. A good night’s sleep is often the best way to help you cope with stress, solve problems, or recover from illness. What Happens During Sleep? Sleep is prompted [...]

Although sleep may seem like a steady state, it actually consists of several stages that cycle throughout the night. The types of brain waves present at the time (based on amplitudes and frequencies) determine the stage of sleep. Only a brief introduction to the stages of sleep will be presented here because a thorough examination [...]

Stages of Sleep Up until the 1950s, before we understood the various stages of sleep, most people thought sleep was a time when our brains and our bodies remained relatively dormant. Scientists and researchers have since revealed that, for our brains at least, sleep is quite the contrary—a very active state affecting both our physical [...]

There are five phases of sleep: stages 1, 2, 3, 4 and REM (rapid eye movement). Usually when you are sleeping, you begin at stage 1 and go through each stage until reaching REM sleep, and then you begin the cycle again. Each complete sleep cycle takes from 90 to 110 minutes. Your brain acts [...]

Stages of Sleep Usually sleepers pass through five stages: 1, 2, 3, 4 and REM (rapid eye movement) sleep. These stages progress cyclically from 1 through REM then begin again with stage 1. A complete sleep cycle takes an average of 90 to 110 minutes. The first sleep cycles each night have relatively short REM [...]

Stages of SleepPDF version for Printing One of the most pervasive misconceptions about sleep is that sleep is just a matter of our bodies “turning off” for several hours, followed by our bodies “turning back on” when we awake. In short most of us think of sleep as a passive and relatively constant and unchanging [...]

The invention of the electroencephalograph allowed scientists to study sleep in ways that were not previously possible. During the 1950s, a gradate student named Eugene Aserinsky used this tool to discover what is known today as REM sleep. Further studies of human sleep have demonstrated that sleep progresses through a series of stages in which [...]

[an error occurred while processing this directive] Stages of Sleep The old myth that sleep is a rest period for the brain is definitely not correct. In fact, the brain (1) is extremely active during sleep. First of all, the brain is what tells us when it is time to sleep. Sensation of light taken [...]

Contrary to some anecdotal information, all mammals require sleep. This sleep need is remarkably standardized in both quality and quantity and, if disturbed, results in problems during wakefulness. Sleep is divided into two distinct states known as non-rapid eye movement sleep (NREM) and rapid eye movement sleep (REM). These two states occur in a roughly [...]

Sleep 101 What Is REM Sleep? Usually, REM sleep occurs 90 minutes after sleep onset. The first period of REM typically lasts 10 minutes, with each recurring REM stage lengthening, and the final one may last up to an hour. Polysomnograms show brainwave patterns in REM to be similar to that recorded during wakefulness. In [...]