Psoas Major Muscle

**Semantic type:** Anatomical Structure

**Definition:** A striated muscle located in the iliac region that originates both on the transverse processes of the twelfth thoracic through fifth lumbar vertebrae and the lateral aspects of the discs between them, and inserts on the lesser trochanter of the femur; it functions to flex the hip joint.

**Synonyms:** - MUSCLE, PSOAS MAJOR - Musculus Psoas Major - Psoas Magnus