cluneal nerve

Inferior cluneal nerves (pink region, not designated with its own section)

The superior cluneal nerves innervate the skin of the upper part of the buttocks.

The pain is due to the cluneal nerve that runs right along the iliac crest, which makes this a very debilitating injury.

Superior cluneal nerves (yellow) - labeled as "post."

The cluneal nerves (or clunial nerves) are cutaneous nerves of the buttocks.

"Superior Cluneal Nerve Entrapment - An Overlooked Cause of Low Back Pain," Dynamic Chiropractic, 16(10).

The medial branch of the superior cluneal nerve passes over the iliac crest through a tunnel formed by the thoracolumbar fascia and the superior rim of the iliac crest.

This branch of the superior cluneal nerve may become restricted in its osteofibrous tunnel against the iliac crest, just as osteofibrous tunnels affect other nerves, such as in carpal tunnel syndrome.