IS YOUR HIP PAIN COMING FROM A TIGHT PSOAS MUSCLE? The psoas muscle, (psoas major) is often a muscle that gets blame a lot for people who have both hip and back pain. Unfortunately it gets blamed way too much. The psoas major muscle is a fusiform muscle lateral to the lumbar region of the vertebral column and the pelvis. It attaches by slender fasciculi cranially to the medioventral surface of the vertebral body and disc, and caudally to the ventrocaudal borders of the lumbar transverse processe

Psoas major anatomy: The psoas major is a deep muscle that originates from the transverse processes, vertebral bodies, and intervertebral discs of T12 to L5. It travels downward through the pelvic cavity, passes deep to the inguinal ligament, and inserts into the lesser trochanter of the femur. Along its course, it lies adjacent to the lumbar plexus, ureter, and abdominal aorta. It’s innervated by branches of the lumbar plexus, primarily from spinal nerves L1 to L3, and occasionally L4. Function