Lumbar vertebrae to lesser trochanter of the femur.
Transverse processes of T12-L5 and the lateral aspects of the discs between them. The psoas major is divided into a superficial and deep part. The deep part originates from the transverse processes of lumbar vertebrae I-V. The superficial part originates from the lateral surfaces of the last thoracic vertebra, lumbar vertebrae I-IV, and from neighboring intervertebral discs. Wiki
In the lesser trochanter of the femur.
Flexion in the hip.
At the coxal joint, it flexes, laterally rotates, and adducts the hip.
Innervation – Nerve control
Lumbar plexus via anterior branches of L1-L3 nerves.
Lumbar branch of iliolumbar artery.
The lumbar branch of the iliolumbar artery (ramus lumbalis) supplies the psoas major and quadratus lumborum, anastomoses with the last lumbar artery, and sends a small spinal branch through the intervertebral foramen between the last lumbar vertebra and the sacrum, into the vertebral canal to supply the cauda equina. Wiki
The gluteus maximus is the main extensor muscle of the hip. It is the largest and most superficial of the three gluteal muscles and makes up a large portion of the shape and appearance of each side of the hips. Wiki
Pictures of muscles
Trigger Point Referrals