Which point is located on the anterior aspect of the arm, 2 cun below the anterior axillary fold, between the two heads of the biceps brachii?

• A. PC 2
• B. PC 3
• C. PC 4
• D. PC 5

Answer: (A)

Locating points on the Pericardium channel uses clear arm landmarks and a cun measurement. The description—anterior aspect of the arm, 2 cun below the anterior axillary fold, between the two heads of the biceps brachii—matches the point in the upper arm segment of the PC channel, known as PC 2 (Ximen). This spot sits in the groove between the two heads of the biceps, about 2 cun down from the front armpit fold, along the inner aspect of the arm. The other PC points in this region are located at different landmarks (for example, PC 3 is at the elbow crease, and PC 4 and PC 5 lie further down the forearm), so they don’t fit the described location.