Which BL point lies over the fourth posterior sacral foramen?

• A. BL 34
• B. BL 31
• C. BL 32
• D. BL 33

Answer: (A)

The location of Bladder points in the sacral region follows the sequence of the posterior sacral foramina. As you move down the sacrum, each foramen corresponds to one Bladder point: the first foramen is Bladder point 31, the second is 32, the third is 33, and the fourth is 34. So the point over the fourth posterior sacral foramen is Bladder 34. This mapping makes it easy to memorize by counting downward along the sacral foramina.