Iliac fascia

The iliac fascia (or Abernethy's fascia) is the fascia overlying the iliacus muscle.

Superiorly and laterally, the iliac fascia is attached to the inner aspect of the iliac crest; inferiorly and laterally, it extends into the thigh to unite with the femoral sheath; medially, it attaches to the periosteum of the ilium and iliopubic eminence near the linea terminalis, and blends with the psoas fascia and - over the quadratus lumborum muscle - with the anterior layer of thoracolumbar fascia.

The iliac fascia overlies the femoral nerve, and lateral femoral cutaneous nerve.