Which of the following muscles will the posterior divisions of the lumbosacral plexus innervate?

D. One of the nerves that form from the posterior divisions of the lumbosacral plexus is the femoral nerve. Posterior divisions of the lumbosacral plexus will innervate muscles derived from the posterior condensation (extensors). Rectus femoris muscle is an extensor at the knee joint. Note that rectus femoris muscle and the femoral nerve are related embryologically to the posterior condensation and posterior divisions even though in the adult they are located anterior. This occurs because of the medial rotation of 90.