Search on: CIRCADIAN RHYTHM 
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Descriptor English:   Circadian Rhythm 
Descriptor Spanish:   Ritmo Circadiano 
Descriptor Portuguese:   Ritmo Circadiano 
Synonyms English:   Diurnal Rhythm
Nyctohemeral Rhythm
Twenty-Four Hour Rhythm  
Tree Number:   G07.180.562.190
Definition English:   The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, and feeding. 
Indexing Annotation English:   drug administration based on circadian rhythm = DRUG CHRONOTHERAPY: do not coordinate with CIRCADIAN RHYTHM or DRUG ADMINISTRATION SCHEDULE; jet lag: index JET LAG SYNDROME
See Related English:   Biological Clocks
Chronotherapy
Circadian Clocks
Photoperiod
 
History Note English:   66(64); DIURNAL RHYTHM was see under CIRCADIAN RHYTHM 1975-85 (Prov 1969-74) 
Allowable Qualifiers English:  
DE drug effects GE genetics
IM immunology PH physiology
RE radiation effects  
Record Number:   2966 
Unique Identifier:   D002940 

Occurrence in VHL: 		 

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