Which point is on the flexor aspect of the forearm, 3 cun proximal to Da Ling P-7, between the tendons of palmaris longus and flexor carpi radialis?

• A. PC 6
• B. SJ 2
• C. PC 4
• D. PC 5

Answer: (D)

The key idea here is locating a forearm point by using palpable tendon landmarks and a precise distance along the channel. On the flexor (inner) aspect of the forearm, the tendons of palmaris longus and flexor carpi radialis create a clear groove. Three cun up from the wrist crease at Da Ling (the Pericardium channel point PC-7) sits a point exactly in that groove between those two tendons. That defining spot corresponds to Pericardium point three cun proximal to PC-7, between palmaris longus and flexor carpi radialis, which is PC-5. This is why it’s the best match for the description.

The other options don’t fit this specific anatomical position: they are either at different distances from PC-7 or located on different parts of the hand or other channels, so they wouldn’t be described as three cun up on the flexor forearm between those two tendons.