What anatomical landmark corresponds with Du-12?

Du-12, also known as "Shendao," is located on the midline of the back, specifically at the level of the 3rd thoracic vertebra (T3). This anatomical landmark is situated approximately 1.5 cun above the level of the spinous process of T3. In relation to the bladder meridian, this point is closely associated with BL-13, which is located at the same level, just off the midline.

This correspondence is significant for practitioners, as finding Du-12 accurately is essential for effective acupuncture treatment. Du-12 is often regarded as a point that influences the Lung and Qi, hence the need to correlate it perfectly with the appropriate thoracic vertebral levels for clinical efficiency.

Other options do not align with the correct anatomical location of Du-12. For example, option A places Du-12 below T5, which is incorrect since that would not correlate with the designated level of Du-12. Similarly, options C and D involve placement at T2 and T1 respectively, which do not match the anatomical position of Du-12 as defined by T3. This emphasizes the importance of anatomical precision in acupuncture practice.