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.
This site is undergoing changes. Starting in early 2020, we began changing the format of the posts to include more extensive self-care, illustrations, therapist notes, anatomy, and protocols. We appreciate your input and feedback. You will see us adding posts and updating older posts as time permits.
Tony Preston has a practice in Atlanta, Georgia where he sees clients. He has written and taught about anatomy, trigger points, and cranial therapies since the mid-90s.
*This site is undergoing major changes. We are reformatting and expanding the posts to make it easier to read, more accessible, and
to include more patterns with better self-care. In the meanwhile, there will be inconsistency in formatting, content, and readability until we get the old posts updated. Please excuse our mess.