There are so many examples of ultradian rhythms in the body – our sleep cycles, brain activity and blood circulation are just three – so there is no one way to support all your ultradian rhythms.

We have been elucidating that the transcription factors Hes1 and Hes7 function as ultradian clocks and that there are other ultradian oscillators, but their whole picture is not known.In this research ...

The alternation of SWS and REMS forms what is known as the ultradian sleep rhythm ... After such a unilateral perturbation, ...