Learner's definition of FAMILIARITY. [noncount] 1. : the state of being familiar with something : the state of having knowledge about something â usually + with. His familiarity with local issues helped him during the campaign. The job requires familiarity with current software.
Vastus lateralis. The vastus lateralis muscle is located on the side of the thigh. This muscle is the largest of the quadriceps group (often called quads) which also includes the rectus femoris, the vastus intermedius, and the vastus medialis.
The sartorius muscle in the longest muscle in the body. It is long and thin, running across the thigh in a inferomedial direction. It is found more superficially to the other muscles in the leg. 1  Attachments: Originates from the anterior superior iliac spine, and attaches to the superior, medial surface of the tibia.2  Actions: At the hip joint, it is a flexor, abductor and lateral rotator. 3  At the knee joint, it is also a flexor.he quadriceps femoris is the main extensor of the knee. Vastus Muscles. There are three vastus muscles â vastus medialis, vastus intermedius and vastus lateralis. They are located exactly where their names suggest; the medialis lies on the medial side of the anterior thigh, and the lateralis lies on the lateral side.