While a few people have gone as long as 11 days (264 hours ... driving in the United States. The effects can worsen as you continue to go without sleep. Here are the symptoms you may experience ...

Learn the critical time limits of sleep deprivation and the dangerous consequences for the human body and mind.

In humans, falling asleep ... that the findings show sleep doesn’t have to be in one long block to be helpful. For some animals, even small bits of sleep can add up and be useful (see graphic).