Shíqǐzhǔixìa is located on the midline of the lower back, below the spinous process of which vertebra?

• A. L3
• B. L4
• C. L2
• D. L5

Answer: (D)

In locating midline back points, the description uses the vertebral landmarks to pin down exact levels. Shíqǐzhǔixìa is described as being on the midline of the lower back and specifically positioned below the spinous process of a vertebra. That place is just beneath the fifth lumbar vertebra, so you identify the L5 spinous process and then move a little bit inferior along the midline to reach the point. This level makes sense because it sits lower on the lumbar region, near the transition to the sacrum. The higher options would place you above L5, which would not match the given description.