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The iliopsoas has an underrated role in spinal stabilization. It makes sense when you see how the psoas attaches all along the lumbar spine, providing compression and stabilization against uncontrolled spinal flexion, lateral flexion, and shear. It’s kind of a big deal like that. Interestingly enough, the psoas also has tremendously important fascial networks, with the medial arcuate ligament providing a continuation directly to the diaphragm. Its lower fibers directly at
