![]() NREM sleep is composed of three stages and REM sleep represents the final sleep stage. The two types of sleep are further categorized into four sleep stages, each associated with distinct patterns in brain waves, eye movements, and other changes in the body. Interestingly, dreams can occur during both NREM and REM sleep, but those that happen during REM are often the most vivid. While researchers are still learning about the function of REM sleep, REM sleep is often associated with dreaming. ![]() Periods of REM sleep tend to become longer though the night. Muscles throughout the body become temporarily paralyzed during REM to prevent movement, while the eyes dart rapidly back and forth. During REM sleep, breathing and heart rate become quicker, and blood pressure increases to levels near those found during waking hours. Rapid eye movement (REM) sleep makes up the remainder of time spent asleep. More than 75% of sleep time is spent in NREM sleep. As the body moves into a deeper and more restful state, breathing and heart rate slow, blood pressure drops, and the eyes do not move. NREM Sleepĭuring non-rapid eye movement (NREM) sleep, the body progresses from a relatively light sleep to a deeper sleep from which it’s more difficult to be awakened. The length and pattern of sleep cycles also vary based on a person’s age, mood, recent sleep habits, and medication use, including caffeine and alcohol. As the night progresses, sleep cycles grow longer and can last around 90 to 120 minutes. Sleep cycles are usually shorter early in the night, with the first sleep cycle lasting only 70 to 100 minutes. People typically go through five or six sleep cycles every night. During a sleep cycle, the brain alternates between rapid eye movement (REM) and non-rapid eye movement (NREM) sleep. What Are Sleep Cycles?Ī sleep cycle is a period of time in which the body cycles through two different types of sleep. #DEEP SLEEP VS REM FULL#Understanding how sleep works can empower you to improve your sleep health and get the full benefits of a good night’s rest. ![]() Good sleep leaves you feeling your best and comes with a range of benefits - from a better mood to enhanced learning and memory.Ĭonsidering that you spend around one-third of your life asleep, it’s understandable that you might be curious about what happens during your nightly rest. What happens during sleep affects how you think, feel, and function during the day. Sleep is just as important to your health as food and water. In fact, what happens during sleep affects almost every bodily system. ![]() Although the body is relaxed during sleep, the mind is hard at work. Sleep is a period of rest during which your body gets a break from daytime stress and activity. ![]()
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