Which nerves innervate the posterior scrotum?

Which nerves innervate the posterior scrotum?

• A. Superficial perineal branches of pudendal nerve
• B. Perineal branch of posterior cutaneous nerve of the thigh
• C. Both of the above
• D. Ilioinguinal nerve

Answer: (C)

The posterior scrotum gets sensory input from two separate nerve sources. One route comes from the pudendal nerve through its perineal branches, especially the superficial perineal nerves, which supply the skin of the posterior aspect of the scrotum. The other route comes from the posterior femoral cutaneous nerve, whose perineal (posterior scrotal) branch travels to the perineum and provides innervation to the posterior scrotal skin. The ilioinguinal nerve supplies the anterior scrotum, not the posterior, so it’s not involved here. Since both pathways contribute to posterior scrotal sensation, the combined sources are responsible for its innervation.

The posterior scrotum gets sensory input from two separate nerve sources. One route comes from the pudendal nerve through its perineal branches, especially the superficial perineal nerves, which supply the skin of the posterior aspect of the scrotum. The other route comes from the posterior femoral cutaneous nerve, whose perineal (posterior scrotal) branch travels to the perineum and provides innervation to the posterior scrotal skin. The ilioinguinal nerve supplies the anterior scrotum, not the posterior, so it’s not involved here. Since both pathways contribute to posterior scrotal sensation, the combined sources are responsible for its innervation.