3 The human foot has a dynamic design that adjusts continually during each part of a step. Drawings by Elftman and Manter (1935), photos by DeSilva, via American Journal of Physical Anthropology. It is commonly held that the human midfoot remains rigid and, like this foot, does not have a midtarsal break.
Both orthopedic and anthropological literature reveals “considerable variation in human midfoot mobility.” 1Īs the human foot rocks forward, its fulcrum shifts from the heel to the ball of the foot. However, two podiatrists commenting on the study report they’ve seen the midtarsal break but don’t call it by that name. I mean, 80 years of research has argued that humans don't do this,” DeSilva said. They call the resulting bend a midtarsal break and believe it reflects common ancestry with apes. DeSilva and Gill surmised from video analysis that these 32 hyperpronators also had more flexibility in the middle part of their feet than normal for humans. Plantar pressure sensors showed that some people place much heavier pressure on the outside of the sole and then hyperpronate the foot inward as they roll it forward. While no humans have opposable big toes like apes, Jeremy DeSilva and Simone Gill report in the American Journal of Physical Anthropology that eight percent of 398 adult visitors who walked across a 20-foot long mechanized gait carpet made a footprint reminiscent of their ape-like forebears. National Geographic: “ A New Feet in Primate Research”īarefoot Boston Museum visitors reportedly reveal that some humans are not so far removed from ape-like ancestors as previously thought.
NewScientist: “ 1 in 13 People Have Bendy Chimp-Like Feet”.
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