Psoas minor is an inconstant slender muscle, which lies anterior to psoas major within the abdomen.  It is absent in about 40% of people.

Proximal Attachment
It arises from the sides of the bodies of the adjacent margins of T12 and L1 and the intervening intervertebral disc.

Distal Attachment
It has a short belly and a long tendon, which attaches to the pecten pubis, iliopubic eminence and iliac fascia laterally.

Nerve Supply
A branch of the ventral ramus of the first lumbar nerve supplies psoas minor.

Action
Psoas minor is a weak flexor of the lumbar spine.