The patella, or kneecap, is a key anatomical landmark for defining the front plane of the leg. Its triangular shape helps artists divide the thigh and shin, observe surface anatomy, and capture movement. When the leg is extended, the patella is prominent, aiding in the depiction of light, shadow, and contour. Classical artists often emphasized the patella to highlight athleticism.
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The term patella comes from Latin, where “patella” is a diminutive of “patina,” meaning a shallow pan or dish—reflecting the bone’s dish‑like shape.