The document discusses the muscles of the anterior compartment of the thigh. It describes the sartorius muscle, which runs down the length of the thigh over the hip and knee joints. It then discusses the quadriceps femoris, which consists of four muscles - the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. Together they form the bulk of the thigh and are among the most powerful muscles. The document provides details on the origin, insertion, innervation and actions of each of these muscles.