Anatomy

Arachnoid

A delicate membrane enveloping the brain and spinal cord. It lies between the PIA MATER and the DURA MATER. It is separated from the pia mater by the subarachnoid cavity which is filled with CEREBROSPINAL FLUID.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A delicate membrane enveloping the brain and spinal cord. It lies between the PIA MATER and the DURA MATER. It is separated from the pia mater by the subarachnoid cavity which is filled with CEREBROSPINAL FLUID.

MeSH Record

Classification

Broader headings

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Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • Arachnoid Mater
  • Arachnoid Maters
  • Arachnoids

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

Indexing Annotation

inflammation = ARACHNOIDITIS

MeSH Record

History Note

2015; for TENTORIUM CEREBELLI use SPINAL CORD 2015-2019

MeSH Hierarchy

Tree Number

  1. A08w.186w.566w.166w

MeSH Record

NLM Classification

WL 200

AMA Style

References

  1. National Library of Medicine. Arachnoid. Medical Subject Headings (MeSH). 2026. Unique ID D001099. http://id.nlm.nih.gov/mesh/2026/D001099
  2. Arachnoid. In: Wikipedia. https://en.wikipedia.org/wiki/Arachnoid_mater
  3. Arachnoid. In: Wikidata. https://www.wikidata.org/wiki/Q1647112