The Lateral rotator group are a group of muscles of the hip consisting of the externus obturator, the internus obturator, the piriformis, the superior gemellus, the inferior gemellus, and the quadratus femoris. These six originate at or below the acetabulum of the ilium and insert on or near the greater trochanter of the femur. In human anatomy, the muscles of the hip joint are those muscles that cause movement in the hip. ... The piriformis (from Latin piriformis = pear shaped) is a muscle in the gluteal region of the lower limb. ... The quadratus femoris muscle is a muscle of the human body. ... Categories: Anatomy stubs | Skeletal system ... The term Illion, Ilium has several meanings, including in legends, in anatomy, and in the arts: Ilion or Ilium is an alternative name for the legendary city of Troy. ... Bones of the Hip In anatomy, the hip is the bony projection of the femur, known as the greater trochanter, and the overlying muscle and fat. ... The femur or thigh bone is the longest, most voluminous and strongest bone of the human body (able to withstand over 550 pounds of force). ...