ABSTRACT
Nervus cutaneus femoris posterior originates from the posterior surface of the sacral plexus by two or three roots,
alone or together with the nervus gluteus inferior, in which case it is called (according to Bichat) nervus gluteus minor. Running between the piriformis muscle and plexus sacralis, it leaves the basin together with the nervus gluteus inferior, posterior to the nervus ischiadicus, and through the foramen infrapiriforme. In the gluteal region, the nerve is covered by the gluteus maximus muscle, posterior to the ischiadicus nerve. In the thigh, it runs between the biceps femoris and semitendinosus muscles below the fascia lata. The nerve gives off terminal branches that pierce the fascia lata and ramify in the skin of the posterior surface of the thigh. Besides its terminal branches, the nerve gives off collateral branches: clunium inferiores nervi for the skin and distal gluteal area and rami perineales for the perineum and posterior part of the labia majora.
