This is referred to as biphasic sleep. Prior to biphasic sleep, some historians believe that hunter-gatherer societies slept in one smaller stretch throughout the night — closer to how we do now.

Biphasic anaphylaxis is a secondary anaphylactic reaction. Get the facts on symptoms, risk factors, prevention, and more.

A regular, sufficient sleeping pattern is vital to good physical and mental health. This MNT Knowledge Center article explores and explains biphasic and polyphasic sleep patterns. MNT looks at how ...

For millennia, people slept in two shifts – once in the evening, and once in the morning. But why? And how did the habit disappear?

Biphasic sleep refers to a sleep schedule where a person sleeps for two segments per day. Learn what research tells us about biphasic sleep.

Today’s sleep writers often wield Ekirch’s research to suggest that segmented sleep (or, as Ekirch calls it, biphasic —two-phase—sleep) is old, and one-sleep is new, and therefore today ...

There is evidence that people used to regularly sleep in two shifts. Whether this could improve your sleeping pattern is up in the air.

Characterization of dynamic changes in cardiac microstructure after reperfused ST-elevation myocardial infarction by biphasic diffusion tensor cardiovascular magnetic resonance ...