Psoas Minor

Region: Back Muscles · All back muscles

Psoas Minor at a glance

OriginBodies of T12 and L1 vertebrae
InsertionPectineal line of the pelvis and iliopectineal eminence
ActionsWeakly flexes the lumbar spine; Tenses the iliac fascia
Nerve supplyVentral ramus of L1

◆ Good to know

It is absent in roughly half of all people, and its long flat tendon is a useful landmark on the front of psoas major.

Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.