What is the anatomical reference point for Ren-15?

Ren-15, also known as "Jiuwei," is an acupuncture point located on the Ren meridian, which runs along the midline of the body. The anatomical reference for Ren-15 is positioned 7 cun above the umbilicus. In traditional Chinese medicine, "cun" is a unit of measurement based on body proportions, with one cun typically being the width of a person's thumb.

The location of Ren-15 is significant as it lies close to the heart and serves important functions within acupuncture practice, such as aiding in the treatment of emotional issues, digestive disorders, and respiratory conditions. Understanding the precise measurement from a key landmark like the umbilicus is crucial for accurate needle placement, ensuring the effectiveness of treatment.

The other options suggest measurements that do not correspond to the established location of Ren-15, thus indicating a different anatomical reference point. Understanding the placement of acupuncture points is essential for practitioners in delivering safe and effective treatments.