He, a genus of the birds, crane in general name; ding, the highest point of humen body or object such as the vertex. The knee joint looks like a crane's head. So it was called "Heding".
Above the knee, in the depression of the midpoint of the upper border of the patella.
Pain in the lower extremities, weakness of the leg and foot, paralysis.
Puncture perpendicularly 0.3-0.5 inch. Moxibustion is applicable.