perineal branches of posterior femoral cutaneous nerve perineal branches of posterior femoral cutaneous nerve the perineal branches of the posterior femoral cutaneous nerve are distributed to the skin at the upper and medial side of the thigh. not to be confused with perineal nerve. perineal branches of posterior femoral cutaneous nervenerves of the right lower extremity. posterior view. (perineal branch labeled at upper left.)the superficial branches of the internal pudendal artery. (nerve visible at bottom right, but not labeled.)detailsfromposterior femoral cutaneous nerveidentifierslatinrami perineales nervi cutanei femoris posteriorista98a14.2.07.035ta26568fma21847anatomical terms of neuroanatomy one long perineal branch, inferior pudendal (long scrotal nerve), curves forward below and in front of the ischial tuberosity, pierces the fascia lata, and runs forward beneath the superficial fascia of the perineum to the skin of the scrotum in the male, and of the labium majus in the female. it communicates with the inferior anal nerves and the posterior scrotal nerves.