Ilioinguinal Nerve

The Ilioinguinal nerve innervates the internal abdominal oblique and transversus abdominus muscles, and provides general sensation to the medial one third of the subinguinal area and the anterior aspect of the genitalia.

The cutaneous part of the ilioinguinal nerve is susceptible to injury during surgical repair of inguinal hernia. Severing the nerve leads to an unpleasant numbness over the anterior scrotal/labial area. This nerve is vulnerable in bone marrow aspirations of the anterior iliac crest.