Which statement about the lateral arcuate ligament extension is correct?

Which statement about the lateral arcuate ligament extension is correct?

• A. From L1 TP to lower border of 12th rib
• B. From L2 TP to 12th rib
• C. From L1 TP to upper border of 12th rib
• D. From L1 TP to 11th rib

Answer: (A)

The lateral arcuate ligament extension is the fascial band that arches over the quadratus lumborum, running from the transverse process of the first lumbar vertebra (L1) to the lower border of the twelfth rib. This attachment pattern explains its position forming the lateral arch of the diaphragm’s extensions into the posterior abdominal wall. The other options misstate either the vertebral level (L2) or the rib border (upper border or the 11th rib), which is why they are not correct.

The lateral arcuate ligament extension is the fascial band that arches over the quadratus lumborum, running from the transverse process of the first lumbar vertebra (L1) to the lower border of the twelfth rib. This attachment pattern explains its position forming the lateral arch of the diaphragm’s extensions into the posterior abdominal wall. The other options misstate either the vertebral level (L2) or the rib border (upper border or the 11th rib), which is why they are not correct.