Biphasic sleep, or bimodal sleep, is a sleep pattern that involves two periods of sleep. For example, a biphasic sleep ...

Biphasic sleep is a pattern that is followed for 24 hours, where a person sleeps in two cycles or segments. Also known as bimodal sleep, it is a concept that divides nighttime sleep into two blocks.

A study of sleep in the pre-industrial era found that there was a bimodal pattern of sleep: given the opportunity humans will go to sleep, wake up after a few hours and interact, then have another ...