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.
Synonyms: Cycles, Activity, Activity Cycle, Cycle, Activity, Activity Cycles
Instance information
comment
91; was see under CIRCADIAN RHYTHM 1975-90 ,search CIRCADIAN RHYTHM 1968-74 ,91(75); was see under CIRCADIAN RHYTHM 1975-90
identifier
D000204
Instance relations
Types