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Psoas minor

Other Terms: Psoas minor muscle, Musculus psoas minor, Muscle petit psoas

Muscle parts

None

Latin name

Musculus psoas minor

Latin muscle parts

None

Group

Abdominal wall – subvertebral muscle

Etymology

The English name for this muscle is the lesser muscle of the loin region. The word psoas comes from the Greek psoa meaning the “loin region.” The term minor comes from the Greek meion meaning “lesser.” As is typical in anatomical terminology, this comparative reference clues you into the fact that this is a smaller version of a similar placed larger muscle.

Origin

Lateral aspect of vertebral body of 12th thoracic and 1st lumbar vertebrae

Insertion

Pectineal line of pubis

Action

Assists with flexion of the lumbar vertebral column

Nerve supply

Small branch from the initial part of the lumbar ventral ramus(L1)

Blood supply

Lumbar arteries, lumbar branch of the iliolumbar artery.

Latin

Musculus psoas minor

French

Muscle petit psoas

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