The midfoot is the middle region of the foot that connects the back (hindfoot) with the front (forefoot). The midfoot bones and ligaments help to form the arch of the foot. The midfoot is supported by five bones: the cuboid, navicular, and the three cuneiform bones as well as a number of ligaments. An injury to one or more of the ligaments that connect these bones is called a midfoot sprain.
A midfoot sprain can occur in different grades, each one classified by the severity of the injury:
- Grade I: There is stretching and microscopic tearing of the ligaments.
- Grade II: The ligaments are partially torn.
- Grade III: The ligaments are completely torn.
One type of severe midfoot sprain is called a Lisfranc injury .