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Physical Phenomena > Time > Periodicity > Ultradian Rhythm > Activity Cycles
Physiological Phenomena > Chronobiology Phenomena > Periodicity > Ultradian Rhythm > Activity Cycles

Preferred term

Activity Cycles  

Type

  • Topical Descriptor

Broader concept

Scope note

  • Bouts of physical irritability or movement alternating with periods of quiescence. It includes biochemical activity and hormonal activity which may be cellular. These cycles are shorter than 24 hours and include sleep-wakefulness cycles and the periodic activation of the digestive system.

History note

  • 91(75); was see under CIRCADIAN RHYTHM 1975-90

In other languages

URI

http://www.yso.fi/onto/mesh/D000204

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