These five Metatarsals are long and convex in shape, consisting of three parts: Shaft or Body, Base and Head.
- Shaft or Body is prism in shape forming a cone from Tarsal to Phalangeal Extremity.
- Base is joined with tarsal bones proximally and its side with Contiguous Metatarsal Bones. The dorsal and palmar surfaces of base are rough due to the attachment of ligaments.
- Head is a convex joint surface, sides are smooth and on each smooth side is a Tubercle (a rough outgrowth on bone) for the attachment of ligaments.
ARTICULATIONS OR JOINTS
The articulations of Metatarsal joints are as follows.
- First Metatarsal joins with Medial (First) Cuneiform and a little with Middle Cuneiform.
- Second Metatarsal makes joints with all of three Cuneiforms.
- Third Metatarsal joins with Lateral (Third or External) Cuneiforms.
- Fourth Metatarsal attaches to Lateral Cuneiform and Cuboid (Tarsal bone of foot)
- Fifth Metatarsal Joins with Cuboid.
Eight muscles are attached to Metatarsal bones. These eight muscles in order are as follows.
- Tibialis Interior
- Peroneous Tertius
- Peroneous Longus
- Peroneous Brevis
- Adductor Hallucis
- Flexor Digiti Minimi Brevis
- Plantar Interossei
- Dorsal Interossei