Anatomy

Third Ventricle

A narrow cleft inferior to the CORPUS CALLOSUM, within the DIENCEPHALON, between the paired thalami. Its floor is formed by the HYPOTHALAMUS, its anterior wall by the lamina terminalis, and its roof by EPENDYMA. It communicates with the FOURTH VENTRICLE by the CEREBRAL AQUEDUCT, and with the LATERAL VENTRICLES by the interventricular foramina.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A narrow cleft inferior to the CORPUS CALLOSUM, within the DIENCEPHALON, between the paired thalami. Its floor is formed by the HYPOTHALAMUS, its anterior wall by the lamina terminalis, and its roof by EPENDYMA. It communicates with the FOURTH VENTRICLE by the CEREBRAL AQUEDUCT, and with the LATERAL VENTRICLES by the interventricular foramina.

MeSH Record

Classification

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Synonyms

7 entry terms
  • 3rd Ventricle
  • 3rd Ventricles
  • Third Ventricles
  • Ventricle, 3rd
  • Ventricle, Third
  • Ventricles, 3rd
  • Ventricles, Third

MeSH Record

Aspects Covered

23 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

History Note

2000

MeSH Record

Previous Indexing

  • Cerebral Ventricles (1965-1999)

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References

  1. National Library of Medicine. Third Ventricle. Medical Subject Headings (MeSH). 2026. Unique ID D020542. http://id.nlm.nih.gov/mesh/2026/D020542
  2. Third Ventricle. In: Wikipedia. https://en.wikipedia.org/wiki/Third_ventricle
  3. Third Ventricle. In: Wikidata. https://www.wikidata.org/wiki/Q662322