Nerves of the Anterior Abdominal Wall

Subcostal nerve Is the ventral ramus of the twelfth thoracic nerve and innervates the muscles of the anterior abdominal wall. Has a lateral cutaneous branch that innervates the skin of the side of the hip. Iliohypogastric nerve Arises from the first lumbar nerve and innervates the internal oblique and transverse muscles of the abdomen. Divides into a lateral cutaneous branch to supply the skin of the lateral side of the buttocks and an anterior cutaneous branch to supply the skin above the pubis. Ilioinguinal nerve Arises from the first lumbar nerve , pierces the internal oblique muscle near the deep inguinal ring, and accompanies the spermatic cord through the inguinal canal and then through the superficial inguinal ring. Innervates the internal oblique and transverse muscles. Gives rise to a femoral branch , which innervates the upper and medial parts of the thigh, and the anterior scrotal nerve , which innervates the skin of the root of the penis (or the skin of the mons pubis) and the anterior part of the scrotum (or the labium majus). ◄.....Go back to the Gross Anatomy homepage