Sleep is an active process is to restore energy and make appropriate rest. During sleep the human brain does not stop working, but a change mode, so that the body can more effectively store the energy required to supplement and mental and physical. Sleep accounted for one third of life, can be said that the quality of life is good or bad sleep half the foundation.
For a long time without sleep, the body will be many changes. There is a defined, called sleep deprivation. Sleep deprivation is a human or animal to deprive the REM sleep stage act. It may be chronic, and may also be acute. It affects the brain and cognitive systems. Long-term sleep completely for humans is not possible (in addition to suffering from fatal familial insomnia person); transient lethargy inevitable. Have long been deprived of sleep laboratory animals usually die.
San Diego 17-year-old high school student Randy? Gardner has a world record --11 days without sleep. After Randy try to reject two days of sleep, he began to feel sick, and it is difficult to remember the little things, difficulty concentrating and become irritable. When the fourth day, he felt very weak, and even began to feel everything around is not true. When shaking the seventh day, talk becomes Article disarray, he is not in the normal rhythm of the EEG wave. In the last night of his computing power and memory decreased significantly. In the final 11 days, 264 hours later, he finally slept.
After 15 hours of sleep, before all physical discomfort are gone, sober 23 hours later, he again slept 10.5 hours a week after normal sleep, his erratic behavior before gradually returned to normal. Randy? Gardner after a brave attempt, did not leave any sequelae.
In fact, after 24 hours without sleep, dizziness, headache, vertigo is a common symptom. After 24 hours of sleep leaves the body, brain function, the speed of thought will be greatly reduced.
In addition to the brain, the rest of the body will be affected. 2 hours without sleep, endocrine system disorders can also occur to a certain extent. The concentration of leptin in the blood drops, increased levels of ghrelin, appetite surge, then you will be more likely to eat high-calorie low-nutrition foods. Planted obesity risks. Of course, the digestive system will also have a series of questions. Stay up late one day, you will feel significant nausea and sometimes vomiting.
In addition, sleep deprivation reduces the body's immune system, making the body sleep deprivation leukocyte function will be greatly reduced, resulting in the body's resistance to disease is lowered.
When the continuous time over 48 hours without sleep, the brain efficiency is significantly reduced, distractibility, decreased memory. Lack of sleep for 48 hours, the system will be more sympathetic activity, resulting in stress hormone levels rise, not fall, the consequences are increased blood at the same time, it also inhibits the pancreas to secrete more insulin, and insulin is the only body able to lower blood sugar hormones, lack of it, the body's blood sugar will rise. Long past, will be more likely to suffer from diabetes and hypertension. Then the stomach acid reflux may also occur, this is because the lack of sleep after gastric acid secretion increased significantly, if the stomach was bad, it may induce gastric ulcer.
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