how Sleep Is Important for Health
Sleep is an essential function 1, it can recharge yourb odyandmind, so that you can wake up refreshed and stay awake. Healthy sleep also helps the body to stay healthy and keep away from diseases. This can impair your ability to focus, think clearly, and process memory. Children and teens need more sleep, especially if they are younger than 5 years old. Work schedules, daily stresses, turbulent bedroom environments, and medical conditions prevent us from getting enough sleep. Eating a healthy diet and an active lifestyle can help ensure adequate sleep each night — but for some people, chronic sleep deprivation may be the first sign of a sleep disorder.
The science behind sleep
The science behind sleep The 4 internal "circadian clock" regulates your sleep cycle, controlling when you feel tired and ready to go to sleep or refresh and alert. This clock operates 24 hours a day and is called the circadian rhythm. After waking up, you will feel tired all day long. These feelings will peak at night before bed. This sleep drive — also called sleep-wake — may be related to adenosine, an organic compound produced in the brain. As you become more tired, levels of adenosine increase throughout the day, and then the body breaks down this compound while you sleep. Light also affects the circadian rhythm. The brain contains a special area of nerve cells called the hypothalamus, and the group of cells in the hypothalamus is called the suprachiasmatic nucleus, which sends signals when the eyes are exposed to natural or artificial light.
Sleep stages REM
When natural light disappears at night, the body releases melatonin, a hormone that causes drowsiness. When the sun rises in the morning, the body releases a hormone called cortisol, which boosts energy and alertness. The stage of sleep Once we fall asleep, our body follows a sleep cycle divided into four stages. The first three stages are called non-rapid eye movement (NREM) sleep, and the last stage is called rapid eye movement (REM) sleep. REM: The first phase of REM occurs about 90 minutes after you fall asleep. As the name implies, your eyes quickly move back and forth under your eyelids. Your breathing rate, heart rate, and blood pressure will start to increase. The dream usually occurs during REM sleep and your arms and legs become numb - this is believed to prevent you from physically manifesting your dreams.
The importance of getting enough sleep
These four phases will repeat in a cycle throughout the night until you wake up. For most people, each cycle lasts about 90-120 minutes. NREM sleep accounts for approximately 75% to 80% of each cycle. You may also wake up briefly at night, but don't remember the next day. These episodes are called "W" phases. The Importance of Adequate Sleep For most adults, it takes at least 7 hours of sleep each night to maintain normal cognitive and behavioral functions. Lack of sleep can lead to dire consequences. Some studies have shown that lack of sleep can predispose people to inattention, cognitive decline, slow response, and mood changes.
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