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Three‐dimensional functional capacity of the intrinsic hand musculature in humans and chimpanzees

Accurately interpreting the functional significance of variation in hand morphology has been central to discussions of the evolution of in hominoids, especially humans. Although there is an extensive literature on bony morphology, muscle size and strength, kinematics, and use of the hand, to date it has not been possible to visualize and quantify the mechanics of the of the hand in situ.