Which point lies directly below the outer canthus, in the depression at the lower border of the zygomatic bone?

Which point lies directly below the outer canthus, in the depression at the lower border of the zygomatic bone?

• A. SI 15
• B. SI 16
• C. SI 17
• D. SI 19

Answer: (C)

The key idea here is precise surface anatomy for point location. SI 17 is located in the depression directly below the outer canthus, at the lower border of the zygomatic bone. That exact landmark match is why this point is the correct choice. The other options lie in different facial or neck regions and do not correspond to the cheekbone depression below the outer canthus.

The key idea here is precise surface anatomy for point location. SI 17 is located in the depression directly below the outer canthus, at the lower border of the zygomatic bone. That exact landmark match is why this point is the correct choice. The other options lie in different facial or neck regions and do not correspond to the cheekbone depression below the outer canthus.