Page "Homo floresiensis" Paragraph 24

This could be an advantage when arm-swinging, but it complicates activities associated with modern people, such as tool-making.

As for the pectoral girdle of H. floresiensis, they studied a broken clavicle of LB1 and a shoulder blade of LB6.

The clavicle was relatively short, which in combination with the shape of the shoulder blade and the low twist of the arm bone resulted in the shoulder being moved slightly forward, as if it was shrugged.

Thus H. floresiensis could bend the elbow in the way modern people do and Larson concluded that it was able to make tools.