Already after the first day without sleep, self-control and reaction rate to what is happening, the ability to make decisions and predict, and the ability to think progressively decrease. After two sleepless nights, immunity deteriorates. After three, the general motor activity decreases, it is almost impossible to perform mental tasks, hallucinations may appear.
From the 5th day, sleep begins with open eyes. Sleep deprivation studies have shown that a person can even walk, but sleep rhythms appear on the encephalogram. At the same time, he cannot speak and perform any tasks.
After 6 days, a person does not understand who he is and where he is. The number of hallucinations increases, delusional statements appear.
If you continue to deprive a person of sleep further, he will soon die. In experiments on rats, it was shown that the cause of death is multiple organ failure, that is, structural changes occur in almost all organs.
The world record of sleep deprivation for 11 days has been documented. It was installed in 1963 by 17-year-old American schoolboy Randy Gardner.
What happens if you don't sleep for a long time.
Many people want to know how long a person can go without sleep and what will happen to him (how he will feel).
So let's start:
Day without sleep:
Fatigue appears, memory and attention deteriorate.
2-3 days without sleep:
Deteriorates concentration of vision, i.e. hard to focus on anything. Deteriorates speech. Movement coordination is impaired. Nausea, nervous tics appear.
4-5 days without sleep:
The person becomes very irritable. Hallucinations and delusional ideas appear.
6-8 days without sleep:
Speech slows down. The limbs begin to shake. Short-term memory loss. Oddities in behavior are observed.
11 days without sleep (This record was set by 17-year-old R. Gardner in 1965):
Fragmented thinking, numbness, indifference to everything.
Obviously, the brain will look for any opportunity to knock out a person. Even just sitting on the sofa, you will feel how soft and pleasant it is, then tilt your head back, and then fall asleep, as if from sleeping pills. This is probably the only plus.
And now about the cons. You are more likely to experience hallucinations, be irritated, and incapable of serious mental activity. You can't solve quadratic equations until you get some sleep. Speaking of sleep, after such a test, you will sleep for a very long time. The whole organism will have the strongest stress, the heart will be worn out, immunity will decrease, the organs will experience a huge load. In short, risking your health and repeating Randy Gardner's experiment is definitely not worth it.