Science of sleep is one of the most researched trending topic. An average lifespan of the human being is now 75 years. You will feel the surprising fact that we sleep one-third of our lifespan in sleeping, which is 25 years. As per the report of the physicians, an adult person must sleep at least 8 hours per day. You can control your hunger, but it is quite impossible to control your sleep. A stage will come when you automatically sleep even if you are driving a car or reading books preparing for exams. Sleeping is common to mammals, reptiles, and birds. The researchers state that a rat can die within two to three weeks without sleeping, and it takes the same time for dying from starvation.
Stages Of Sleep
According to the science of sleep, there are two stages of sleep. Non-rapid eye movement and rapid eye movement are the two broad stages of sleep. 75% to 80% of the people sleep in this category. The rest 25% of people sleep in the rapid eye category, and this type of sleep can cause mental illness and depression.
Science Of Sleep: Non-rapid Eye Movement
According to the science of sleep, sleeping is composed of four phases. The first stage is between awake and falling asleep, and the second stage regulates heart rate and breathing, and there is a drop in the body temperature. Deep sleep is the third and the fourth stage of non-rapid eye movement. Without deep sleep, you cannot transfer short term memories into long term memories, and it is the peak time for releasing growth hormone in the body, which is essential for cell repair and reproduction.
Science Of Sleep: Rapid Eye Movement
The rapid eye movement is the stage when people use to have vivid dreams. Though people in non-rapid eye movement also have thoughts, and this dream is concept based comparing to rapid eye movement, dreams are emotional and more vivid. Our muscles are temporarily paralyzed and prevent us from acting out the emotions, and people sometimes feel like someone is standing at the corner of the bed or having ghostly feelings.
Two processes can control sleep, according to Wu. Circadian rhythms and sleep drive.
A biological clock located in the brain controls the circadian rhythms. The function of this clock is producing of growth hormone melatonin at night and switching it off after sensing light. The blind people may have trouble because they cannot feel the response of light cues.
Science Of Sleep: Drive
Sleep drive is also one of the critical functions which crave your body for sleeping like hunger. It will desire the body to relax throughout the day, and at a certain point, you have to sleep. As we know, you can control your hunger, but it will be quite impossible for you to control your sleep while you are on a wheel or an office meeting. You can even sleep for one or two seconds, which can be defined as a microsleep episode. The body sleep drive can be reduced by taking a 30 minutes nap, which can throw off your night sleep.
Healthy sleep can allow you to adapt to input or brain plasticity. Researchers state that sleep can promote the removal of waste materials from the brain, which occurs less when the mind is awake.