Which BL point is on the lower leg, 2 cun inferior to Weizhong BL-40, on the line to Chengshan BL-57, in the depression between the two heads of the gastrocnemius muscle?

Which BL point is on the lower leg, 2 cun inferior to Weizhong BL-40, on the line to Chengshan BL-57, in the depression between the two heads of the gastrocnemius muscle?

• A. Bl 55
• B. Bl 54
• C. Bl 53
• D. Bl 50

Answer: (A)

The key idea is locating bladder points on the back of the leg using clear anatomical landmarks. Starting at Weizhong (BL-40) at the center of the popliteal crease, move 2 cun downward along the line toward Chengshan (BL-57). The point sits in the shallow hollow between the two heads of the gastrocnemius muscle. This exact spot—2 cun below BL-40, on the line to BL-57, in that depression between the gastrocnemius heads—identifies the BL point in question. The other options do not occupy this precise combination of distance, alignment, and muscular landmark, so they don’t fit this description.

The key idea is locating bladder points on the back of the leg using clear anatomical landmarks. Starting at Weizhong (BL-40) at the center of the popliteal crease, move 2 cun downward along the line toward Chengshan (BL-57). The point sits in the shallow hollow between the two heads of the gastrocnemius muscle. This exact spot—2 cun below BL-40, on the line to BL-57, in that depression between the gastrocnemius heads—identifies the BL point in question. The other options do not occupy this precise combination of distance, alignment, and muscular landmark, so they don’t fit this description.