Anatomy

Psoas Muscles

A powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the Greek psoa, the plural meaning muscles of the loin. It is a common site of infection manifesting as abscess (PSOAS ABSCESS). The psoas muscles and their fibers are also used frequently in experiments in muscle physiology.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the Greek psoa, the plural meaning muscles of the loin. It is a common site of infection manifesting as abscess (PSOAS ABSCESS). The psoas muscles and their fibers are also used frequently in experiments in muscle physiology.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • Muscle, Psoas
  • Muscles, Psoas
  • Psoas Muscle

MeSH Record

Aspects Covered

24 allowable subheadings

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

MeSH Record

Indexing Annotation

IM for anat & site of dis; NIM in studies on muscle tissue & fibers; infection = probably PSOAS ABSCESS; /growth: coord with MUSCLE DEVELOPMENT; /embryol: coord with MUSCLE DEVELOPMENT if pertinent

MeSH Record

History Note

92

MeSH Record

Previous Indexing

  • Muscles (1968-1991)

MeSH Hierarchy

Tree Number

AMA Style

References

  1. National Library of Medicine. Psoas Muscles. Medical Subject Headings (MeSH). 2026. Unique ID D016658. http://id.nlm.nih.gov/mesh/2026/D016658
  2. Psoas Muscles. In: Wikidata. https://www.wikidata.org/wiki/Q68800232