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[–] 26601223? ago  (edited ago)

https://en.wikipedia.org/wiki/Navicular_bone

The human navicular is not a commonly broken bone but it breaks due two reasons. The first mechanism is a stress fracture which happens commonly in athletes [7] and the other mechanism is a high energy trauma. The navicular bone is a keystone of the foot: it is part of the coxa pedis and articulates with the talus, first, second and third cuneiform, cuboid and calcaneus. It plays an important role in the biomechanics of the foot helping in inversion, eversion and motion; it is a structural link between midfoot and forefoot and it is part of the longitudinal and transverse arch of the foot.

https://www.msn.com/en-us/news/politics/doctor-says-biden-sprained-a-foot-while-playing-with-his-dog/ar-BB1btn6q

Earlier in the afternoon, doctors said they found “no obvious fracture,” but a follow-up CT scan confirmed hairline fractures of Biden’s “lateral and intermediate cuneiform bones, which are in the mid-foot,” according to a statement from his doctor, Kevin O’Connor.

https://en.wikipedia.org/wiki/Cuneiform_bones