Ilioinguinal Nerve Entrapment

Abstract

Entrapment of the ilioinguinal nerve gives rise to a varied symptomatology, the nerve having both muscular and sensory elements, and displays many of the characteristics of an intercostal nerve involvement. Originating from the first and second lumbar segments, the nerve has an extensive path terminating as the motor supply to the lower portions of the transversus and internal oblique muscles, and supplying sensation to the iliac crest, the base of the scrotum (or labia), and the inguinal region. The point of entrapment is usually medial to the anterior superior spine, where the nerve enters the transversus abdominis, and internal oblique muscles in an angular fashion, where it is subject to trauma or irritation.