Are You Sleep Deprived?

Sleep and wakefulness is regulated not just by the homeosthatic sleep drive, but also by the cicadian drive. If you fall asleep very quickly and easily under those conditions, there's a good chance that you are sleep deprived. We don't really know what the function of sleep is - we still don't know. There are a number of hypotheses, which of which i will mention a few of the main ones. But it's still very preliminary and not entirely clear why this would need to happen.