A fifth and very important ligament in the spine, which is frequently overlooked, is the iliolumbar ligament. |
The iliolumbar ligament, as it's name implies, connect the lower lumbar spine to the ilium at the iliac crest and the inner concave surface of the iliac fossa. |
In one case the iliolumbar was a branch of the obturator, itself a branch of the internal iliac. |