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Psoas Minor – Functional Anatomy

The anatomy of the psoas minor muscle is highly variable. One study shows that it is present in about 87% of white cadavers and 8% of black cadavers. Other studies vary in their claims, often showing that it is present in 25-40% of cadavers.

Origin – bodies of T12-L1 via vertical fascicles

Insertion – the innominate line of the pubic bone. It connects to the licac fascia which connects it boadly to the arch of the pubic bone from the iliac spine, to the inguinal tendon and around to the

L2-L5 and the sacrum are trapped between them.

Function – Psoas minor is strongly connected to the iliac fascia and seems to tense that fascia to support the activity of psoas. In some studies, it is argued that it does a number of things from assisting flexion of the pelvis to the positioning of psoas major.

Wikipedia entry for psoas minor.



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