# 3.2: Non-Metric Traits of the Appendages

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Bipartite patella - Division of the patella at the insertion site for the vastus lateralis muscle. Similar to the vastus notch, but has an accessory bone present. The area of division will be porous, centrally roughened, and smooth margins. Seen at a higher frequency among males.

Septal aperture - Perforation of the olecranon process, may be large or small. Seen at a slightly higher frequency among females.

Supratrochlear spine - Bony projection a the attachment site for the pronator teres muscle on the inferior portion of the anterior aspect of the humeral shaft.

Vastus Notch - Division of the patella at the insertion site for the vastus lateralis muscle. The notch area is smooth, flat, and lacking in porosity.

Femur and Patella

Tibia (medial) and Fibula (lateral)