Noun
An internal muscle arising from the lumbar vertebrae and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas.
Source: Webster's dictionaryLizard variation with quad stretch (stretches outer hips, hip flexors, psoas, and quads): From Lizard, come up off the forearms and onto the hands. Source: Internet
Thieme Atlas of anatomy (2006), pp 472-473 The genitofemoral nerve (L1, L2) leaves psoas major below the two former nerves, immediately divides into two branches that descends along the muscle's anterior side. Source: Internet
The psoas major originates from the last vertebra and along the lumbar spine to stretch down into the pelvis. Source: Internet
With larger diameter nerves (such as the interscalene block for upper limbs or psoas compartment block for lower limbs) the nerve and position of the needle is localized with ultrasound or electrical stimulation. Source: Internet
I have that same nagging hip/groin pain; for me, it’s my psoas. Source: Internet