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Psoas Major – Functional Anatomy

Psoas major varies a great deal in size and shape. It originates in the last thoracic and all lumbar vertebrae and inserts on the lesser trochanter of the femur. This muscle traps the coxal bone and sacrum between its attachments. It has two sections. One originates on vertebral bodies or T12-L4, and the other originates on the …

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