Which BL point lies at the level of the lower border of the spinous process of the third thoracic vertebra (T3)?

• A. BL 41
• B. BL 43
• C. BL 44
• D. BL 42

Answer: (D)

Bladder channel points on the back are aligned with thoracic vertebrae, and each point sits at the level of a specific vertebra’s spinous process. The point at the level of the lower border of the spinous process of the third thoracic vertebra is BL-42. That’s why this option is correct. The other nearby points align with the adjacent vertebral levels (one level above or below), so they wouldn’t correspond to the T3 level. In practice, locate T3 by feeling the spine, then identify the point along the bladder channel at that level.