What muscles attaches to the lumbar vertebrae and femur?

The primary muscles that attach to the lumbar vertebrae and the femur include the psoas major and the iliacus, which together form the iliopsoas muscle. The psoas major originates from the lumbar vertebrae and inserts onto the lesser trochanter of the femur, playing a crucial role in hip flexion. Additionally, the quadratus lumborum muscle, which stabilizes the lumbar spine, indirectly influences the femur's position through its connection to the pelvis.