Metatarsal Base, Inferior View

Description

Metatarsal bases form the proximal, broadened ends of the pedal rays, and this inferior (plantar) view emphasizes the articular surfaces that meet the tarsal bones at the tarsometatarsal (Lisfranc) joints. From medial to lateral, the plantar contour transitions from the robust first metatarsal base toward the narrower lesser metatarsals, with the lateral column terminating at the fifth metatarsal base. Plantar roughening and ligamentous attachment areas are apparent around the margins of the base, bordering the smoother cartilage-bearing facets oriented proximally toward the medial cuneiform (first ray), intermediate and lateral cuneiforms (second and third rays), and cuboid (fourth and fifth rays). Orientation is unambiguous. This is the region where midfoot stability is won or lost: disruption of the Lisfranc ligament complex classically involves the second metatarsal base and produces diastasis between the first and second rays, a pattern you can explain directly by the mortise-like fit of the second metatarsal between the cuneiforms. Plantar viewing also supports teaching of force transmission through the longitudinal and transverse arches, because the base geometry and attachment sites for plantar tarsometatarsal ligaments read more naturally from the weightbearing side. For trauma and sports medicine, the same anatomy frames common problems such as tarsometatarsal post-traumatic arthritis and fractures around the fifth metatarsal base, where lateral column loading and tendon traction can complicate management. Use this illustration in gross anatomy and lower limb musculoskeletal courses to anchor terminology for the metatarsal base, tarsal articulations, and plantar versus dorsal surface features. It also suits orthopedic and podiatry texts discussing Lisfranc injury mechanisms, midfoot fixation planning, and radiographic correlation of plantar-sided anatomy in operative reports and patient education. Anatomical accuracy verified by SciePro's Medical Advisory Board.