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Best Anti-Snoring Mouth Guards, Mouthpieces, and Snoring Devices.CPAP Supplies – What connects to the CPAP machine?.CPAP and BiPAP: Which One is Best For You?.Excessive Daytime Sleepiness: Causes, Test and Treatments.Drowsiness: Causes, Treatments, and Prevention.Bruxism – Teeth Grinding Symptoms, Treatment & Causes.Hypersomnia: Symptoms, Causes, Definition and Treatments.Night Terrors: Causes, Symptoms, & Treatments.Sleep Deprivation: Symptoms, Causes, Treatments.Narcolepsy – Definition, Symptoms, Causes & Treatments.Sleep Apnea: Common Causes, Risk Factors, Treatments.Night Guard for Bruxism: Teeth Grinding and Clenching.Best Weighted Blankets: Reviews and How They Work.CPAP Cleaners – Reviews of the Best Cleaning Machines.Mattresses: A Review of the Best and Buying Guide.Sleep Debt: Signs, Symptoms & Treatments.Sleeping Tips to Help You Fall Asleep Fast.Dreams – What they mean and psychology behind them.If you have symptoms such as brain fog, inability to concentrate, the need for naps, irritability, or lack of focus, it could be due to lack of deep sleep. This can lead to the body’s inability to repair damage, few dreams, and increased fatigue upon waking and throughout the day. For those with sleep disorders such as obstructive sleep apnea, the deeper levels of sleep may not be reached as frequently as is normal because they are constantly being woken. The length of each cycle changes throughout the night, but the typical sleeper will cycle through the stages several times before waking. REM sleep occurs approximately 90 minutes into the sleep cycle. The purpose of this stage (and of dreams) is thought to stimulate the sections of the brain that are needed for memory and learning and a way for the brain to store and sort information. Blood pressure and heart rate also increase during REM sleep and the arms and legs are paralyzed so that sleepers can’t act out their dreams. The eyes move rapidly behind the lids and breathing becomes shallow and rapid. The final stage of sleep is REM and this is the cycle where we dream. It’s believed that tissue repair occurs during the stage of sleep and that hormones are also released to help with growth. Stage 4 is an even deeper sleep where the brain waves further slow and sleepers are very difficult to wake. This stage of sleep is difficult to awaken from and you may feel disoriented if an alarm or disturbance pulls you out of it. This is a deep sleep where muscles relax and breathing slows even more. Stage 3 of non-REM sleepīrain waves slow down in stage 3 with only a few bursts of activity. During stage 2, the heart rate and breathing regulate, the body temperature goes down, the eye movements either slow or stop completely. This is the stage where you are actually fully asleep and not aware of your surroundings.

This is a light stage of sleep and you can usually be woken by noises or other disturbances. This is the “twilight” stage of sleep where you are probably still aware of some of the things going on around you. This is characterized by the cessation of muscle movement and the slow movement of the eyes behind the eyelid.

When you first fall asleep, you enter stage 1 of non-REM sleep. Here are the five stages of sleep and why they matter. How much time you spend on each of these stages and the stage you wake from can have a big impact on how rested you feel and how much energy you have throughout the day. However, what many don’t know is that non-REM sleep actually has four different stages that you pass in and out of through the night. Most people are aware of the two different types of sleep: rapid eye movement (REM) and non-REM.