ultradianrytmer
Ultradian rytmer (ultradian rhythms) are recurrent biological cycles with a period shorter than 24 hours. They occur across physiology and behavior and can interact with circadian rhythms to shape daily patterns.
In humans, the most familiar ultradian rhythm appears in sleep. The sleep cycle repeats roughly every 90
Beyond sleep and hormones, ultradian processes include digestive activity, fluctuations in appetite-related hormones, and variations in
Mechanisms underlying ultradian rhythms involve multiple oscillator systems, including neural pacemakers in the hypothalamus and brainstem,