"Other astragalar facets include a narrow convex articular surface for the cuboid adjacent to the deeply notched surface for the navicular, a small curved surface laterally for articulation with the ectal facet of the calcaneum, a proximodistally elongated convex facet ventrally for long excursion on the calcaneal sustentacular surface, and a small facet adjacent to the cuboid facet for articulation with the calcaneum."