Phenomena and Processes

Ultradian Rhythm

A biological rhythm with a period shorter than 24 hours.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A biological rhythm with a period shorter than 24 hours.

MeSH Record

Classification

Broader headings

Narrower headings

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MeSH Record

Synonyms

7 entry terms
  • Rhythm, Ultradian
  • Rhythms, Ultradian
  • Ultradian Rhythms
  • Ultradian Cycle
  • Ultradian Cycles
  • Cycle, Ultradian
  • Cycles, Ultradian

MeSH Record

Aspects Covered

5 allowable subheadings

Indexed with the subheadings drug effects, genetics, immunology, physiology, radiation effects.

MeSH Record

History Note

2017; for ULTRADIAN RHYTHMS use CIRCADIAN RHYTHM 2016; for ULTRADIAN CYCLES use ACTIVITY CYCLES 1985-2016

MeSH Hierarchy

Tree Number

  1. G07.180.562.797w

AMA Style

References

  1. National Library of Medicine. Ultradian Rhythm. Medical Subject Headings (MeSH). 2026. Unique ID D000071218. http://id.nlm.nih.gov/mesh/2026/D000071218
  2. Ultradian Rhythm. In: Wikipedia. https://en.wikipedia.org/wiki/Ultradian_rhythm
  3. Ultradian Rhythm. In: Wikidata. https://www.wikidata.org/wiki/Q377893