Muscles of the hip the ilium. Together these muscles are commonly referred to as the "iliopsoas". This group consists of the externus and internus obturators, the piriformis, the superior and inferior gemelli, 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. Additional muscles, such as the rectus femoris and the sartorius, can cause some movement in the hip joint. However these muscles primarily move the knee, and not generally classified as muscles of the hip. The hamstring muscles, which originate mostly from the ischial tuberosity inserting on
Absence of gluteal muscle Absence of gluteal muscle The congenital absence of the gluteal muscle was described in 1976, as occurring in a brother and sister with absence of gluteal muscles and with spina bifida occulta. It was thought to be caused by an autosomal recessive gene. Edgar "et al." (2012) reported the case of a 15-year-old white male with congenital absence of the "gluteus maximus" muscles associated with spina bifida occulta, learning disability, optic nerve hypoplasia, scoliosis, and central nervous system hamartomas. If gluteal muscles were absent the following actions would not be possible. The "gluteus maximus" extends the thigh at the hip