biological rhythm
biologically inherent cyclic variation or recurrence of an event or state, such as the sleep cycle, circadian rhythms, or periodic diseases
circadian rhythm
natural internal process that regulates the sleep-wake cycle
heart rhythm
rhythm of heart beat
olfactory rhythm
synchronized, rhythmic electrical activity in the brain's olfactory regions, believed to help encode and process smells across a range of vertebrate species
neural rhythm
various forms of rhythm generated by the central nervous system
diel cycle
pattern that recurs every 24 hours as a result of one full rotation of the Earth with respect to the Sun
theta rhythm
neural oscillatory pattern