6. The Flat Triangular Forefoot

It was Locke who identified the flat triangular forefoot as a separate entity, describing a triangular appearance of the forefoot with transverse splaying of the metatarsals in the same horizontal plane associated with atrophy of the loading area. It becomes accompanied by irreducible complex joint displacements maintained by contractures of the soft tissues and consequent development of metatarsalgia. The convergence of the toes is striking (see Figs.5.9C, E, I, K, L; 18.2D; 18.7B, G, H, J, L).