My personal record without sleep was only 39 hours. It was necessary to deliver the project on time. The first time wildly cuts to sleep, distracting yourself as best you can. The most terrible thing for me in this situation is the loss of concentration and attention, I am constantly distracted. Then the moment comes when the desire to sleep disappears and you start working as usual. True, if you need to get from home to the office by public transport, then this is torture. If you sit down, it starts to cut down in the literal sense. You sit and fight with the fact that you stagger and close your eyes. Walking to work is invigorating. It happened that I could remain vigorous and with a clear mind for a long time, and sometimes I still went to bed and it felt like I was turned on like an electrical appliance from the socket - I immediately fell asleep. Once I had to go to bed right in the office, as I literally began to fall asleep in front of the monitor. I woke up at the moment when my head was about to fall into the monitor or keyboard: D
After such tortures I feel like a boiled dumpling. But there were hallucinations only once, when I was preparing a diploma for the delivery and slept for 3-4 hours a day. And it looked like this: you turn on music on your computer, listen to it for a couple of hours, turn it off and hear it all the time until you go to sleep. Once I fell asleep. I woke up with a keyboard print on my cheek)))
Because a person needs sleep not only to put away the extra 8 hours a day. During sleep, the nervous system "restarts", and many functions of the body work in a mode that compensates for the daytime costs. Excessive (with a prolonged lack of sleep) load on the brain creates those unpleasant effects that you could observe.
Some special services that used torture did not allow a person to fall asleep for 2 or more days, and this was the most "affordable" way to make a person lose control over himself and give out all the necessary information or agree to something that a person might initially strongly disagree with.
There are hypotheses that hallucinations and other special effects are not just a result fatigue, and one of the mechanisms that force a person to fall asleep, so that his body would normally recover and be in better shape the next day.
From my own experience, I have not noticed such symptoms on myself .. I used to often have to stay awake for 48 hours (but not more) in order to have time to close a project on time, or invest in a deadline. I think such symptoms appear if we are talking not about one sleepless night, but several, but this is already a pure kind of self-torture, tk. in his right mind, no matter what the case, it is almost impossible to force yourself not to sleep for more than 2 nights. What can I say about one sleepless night ... A turning point in psychological time occurs when, according to the biological clock, a person usually sleeps at this time, but here you have to control yourself. After several hours of the struggle of consciousness with its body, the process of habituation takes place and the absence of sleep is more easily tolerated. But the lack of control from one sleepless night I never lost.