Question:medium
Which of the following statements is NOT true about the iliolumbar ligament?
Which of the following statements is NOT true about the iliolumbar ligament?
Show Hint
Its vertebral attachment is L5, not T12.
Updated On: Jun 24, 2026
- Upper fibres attached to iliac crest
- Lower fibres attached to base of sacrum
- Helps in maintaining lumbosacral joint stability
- Upper attachment to transverse process of T12
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Locate the structure. The iliolumbar ligament is a stout band stretching from the tip of the L5 transverse process to the inner lip of the iliac crest behind.
Step 2: Restate its anatomy. Its upper fibres anchor onto the iliac crest, its lower fibres reach the base of the sacrum, and overall it braces the lumbosacral junction against shearing forces.
Step 3: Check each claim. The statements about iliac-crest attachment, sacral attachment, and lumbosacral stability all match the true anatomy.
Step 4: Catch the error. The ligament springs from the transverse process of L5, not from T12, so claiming a T12 origin is incorrect. That false statement is the answer.
\[\boxed{\text{Upper attachment to transverse process of T12}}\]
Step 2: Restate its anatomy. Its upper fibres anchor onto the iliac crest, its lower fibres reach the base of the sacrum, and overall it braces the lumbosacral junction against shearing forces.
Step 3: Check each claim. The statements about iliac-crest attachment, sacral attachment, and lumbosacral stability all match the true anatomy.
Step 4: Catch the error. The ligament springs from the transverse process of L5, not from T12, so claiming a T12 origin is incorrect. That false statement is the answer.
\[\boxed{\text{Upper attachment to transverse process of T12}}\]
Was this answer helpful?
0
