Which point is on the medial side of the foot, in the depression distal and inferior to the base of the first metatarsal bone?

• A. SP 3
• B. SP 2
• C. ST 43
• D. ST 45

Answer: (A)

The point being tested is SP-3 Taibai, located on the plantar (bottom) aspect of the foot, on the medial side in the hollow distal and inferior to the base of the first metatarsal bone. This exact spot is the classic description for SP-3, the yuan-source point of the Spleen channel, and it sits along the medial side where the Spleen line runs toward the big toe.

This is why it’s the best choice: the description matches the known location of SP-3 precisely, on the plantar medial foot near the base of the first metatarsal. The other points lie in different regions—two are on the dorsal/top side of the foot or near the toes, and they do not correspond to that medial plantar depression.