The nerves in the groin and pelvis comprise a complex group of nerves loosely known as the lumbosacral plexus. These nerves all originate from the nerve roots of the lumbar and sacral spine and then travel through the abdominal wall and pelvis on their way to innervating the lower torso, pelvis, groin and legs. Similar to other peripheral nerves elsewhere in the body, these nerves are susceptible to injury following trauma or surgical procedures in the area.