Which San Jiao point is on the dorsum of the wrist at the level of the wrist joint, in the depression between the tendons of extensor digitorum communis and extensor digiti minimi?

• A. SJ-3
• B. SJ-4
• C. SJ-5
• D. SJ-6

Answer: (B)

The main idea is identifying a San Jiao point by its exact anatomical location. The point described is Yangchi, the San Jiao point located on the dorsum of the wrist right at the level of the wrist joint, in the hollow between the tendons of extensor digitorum communis and extensor digiti minimi. That precise spot matches the description, so it’s the best fit. Yangchi is the Yuan-source point of the San Jiao channel, so it’s a primary point for regulating the channel and addressing issues that relate to the hand and wrist, as well as conditions like heat or fever that the SJ channel can affect. The other points lie in different locations—on the forearm or on other parts of the hand—so they don’t correspond to this particular wrist depression.