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Understanding the Iliopsoas Muscle The iliopsoas is a powerful muscle group consisting of the iliacus, psoas major, and psoas minor. These muscles are critical for hip flexion and connecting the upper and lower body. They play a key role in movement and pelvic stability. Anatomy of the Iliopsoas: Psoas Major, Psoas Minor, and Iliacus The iliopsoas muscle group is comprised of three distinct muscles: the psoas major, psoas minor, and iliacus. The psoas major is a large muscle that originates from the lumbar vertebrae and engages in almost any movement, including walking and running. The psoas minor, a thinner muscle, lies on the front of the psoas major. The iliacus… Read More