Question

Which of the following statements is NOT true about the iliolumbar ligament?

• A. Upper fibres attached to iliac crest
• B. Lower fibres attached to base of sacrum
• C. Helps in maintaining lumbosacral joint stability
• D. Upper attachment to transverse process of T12

Hint:

Its vertebral attachment is L5, not T12.

Answer 1

The Correct Option is D

Step 1: The iliolumbar ligament is a strong band that runs from the tip of the transverse process of the fifth lumbar vertebra (L5) to the posterior part of the inner lip of the iliac crest. Step 2: Its upper band attaches to the iliac crest (option a is true) and its lower band attaches to the base of the sacrum (option b is true). Step 3: Its principal role is to strengthen and stabilise the lumbosacral joint, so option c is also true. Step 4: The medial (vertebral) attachment is the L5 transverse process, NOT the transverse process of T12. Therefore option d is the false statement and the correct answer.