![]() ![]() In addition, stage 1 sleep involves a marked decrease in both overall muscle tension and core body temperature. During this time, there is a slowdown in both the rates of respiration and heartbeat. Stage 1 sleep is a transitional phase that occurs between wakefulness and sleep, the period during which we drift off to sleep. ![]() The first stage of NREM sleep is known as stage 1 sleep. In this section, we will discuss each of these stages of sleep and their associated patterns of brain wave activity. The first three stages of sleep are NREM sleep, while the fourth and final stage of sleep is REM sleep. In contrast, non-REM (NREM) sleep is subdivided into three stages distinguished from each other and from wakefulness by characteristic patterns of brain waves. Brain waves during REM sleep appear very similar to brain waves during wakefulness. Rapid eye movement (REM) sleep is characterized by darting movements of the eyes under closed eyelids. Sleep can be divided into two different general phases: REM sleep and non-REM (NREM) sleep. These changes in brain wave activity can be visualized using EEG and are distinguished from one another by both the frequency and amplitude of brain waves. Instead, sleep is composed of several different stages that can be differentiated from one another by the patterns of brain wave activity that occur during each stage. Differentiate between REM and non-REM sleep.Alcohol and quality sleep do not mix well. REM sleep is also very susceptible to the negative effects of alcohol, just like deep sleep.This is ideal just before your alarm goes off. It stimulates the central nervous system, preparing us to wake up. REM sleep is no longer assumed to be just restorative it is also preparatory.If you wake briefly several times a night but fall back to sleep, you have not missed any of the good stuff. REM is often followed by brief periods of wakefulness, which are normal in a sleep cycle.It is incredibly creative in the connections it attempts beyond what our daytime thinking is capable of. REM also helps us make connections our brain wouldn’t even dare try during the day.REM sleep assists memory differently than deep sleep, focusing on social-emotional memories and even salvaging forgotten memories.It strengthens memories the night after you learn something new, like clicking “Save” for a new document. However, blood pressure, heart rate, and breathing quicken, and our eyes dart beneath our eyelids, thus named rapid-eye-movement sleep, regardless of whether we are dreaming.Dreams commonly occur during REM sleep, but muscles lose all tone, which prevents (most of) us from acting out our dreams.REM usually occurs later in a 90-minute sleep cycle and commonly just before waking.REM brain waves are shorter than delta waves and are not synchronized like deep wave sleep. ![]() It is called paradoxical sleep for this reason. ![]() REM Sleep is quite different from the other stages because the brain appears awake, but the body stays immobile.Source: bruniewska/Shutterstock REM Sleep Things that zap deep sleep include alcohol, benzodiazepines, opioid medications, lack of activity, and oversleeping ( sleeping past your regular wake-up time).The research is clear: we need deep wave sleep to be well. When we lack deep wave sleep, our risk for almost every disease goes up.Growth hormone production occurs in deep sleep and both decrease with age.(Thank goodness because it is difficult to wake from deep sleep, and if someone or something dares do this, you may feel disoriented and irritable). Deep sleep tends to disappear in the last cycles of the night when REM increases.The brain seems to prioritize it, dipping down into deep sleep about an hour after you nod off and then a few more times throughout the night. Deep sleep is more prevalent in the first half of the night.This “neural resonance” may help the lymphatic system cleanse our brains by flushing them of beta-amyloid plaques and misshapen proteins associated with Alzheimer’s disease.It is synchronized with other brain waves, unlike the disharmony of wave patterns during REM sleep. Deep sleep is generated from the frontal lobe and displays the brain at its most coordinated.Deep sleep occurs after shallow sleep (Stages 1 and 2) within a 90-minute sleep cycle.Slow delta brain waves oscillate at about two to four waves per second and make up less than 25 percent of our nightly slumber.I like to think of it as when our sleep sleeps. Deep sleep is one type, the deepest type of non-REM sleep.It goes by many names, including delta wave sleep (its predominant brain wave), Stage 3-4, Stage 3 or Stage 4 Sleep. ![]()
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