Between the toes, the dorsal and plantar interossei stretch from the metatarsals to the proximal phalanges of digits two to five. The plantar interossei adduct and the dorsal interossei abduct these digits, and are also plantar flexors at the metatarsophalangeal joints. Clinical significance
Due to their position and function, feet are exposed to a variety of potential infections and injuries, including athletes foot, bunions, ingrown toenails, Mortons neuroma, plantar fasciitis, plantar warts, and stress fractures. In addition, there are several genetic disorders that can affect the shape and function of the feet, including clubfoot or flat feet. This leaves humans more vulnerable to medical problems that are caused by poor leg and foot alignments. Also, the wearing of shoes, sneakers and boots can impede proper alignment and movement within the ankle and foot. For example, high-heeled shoes are known to throw off the natural weight balance (this can also affect the lower back). For the sake of posture, flat soles with no heels are advised. A doctor who specializes in the treatment of the feet practices podiatry and is called a podiatrist. A pedorthist specializes in the use and modification of footwear to treat problems related to the lower limbs.
Fractures of the foot include:

Lisfranc fracture – in which one or all of the metatarsals are displaced from the tarsus
Jones fracture – a fracture of the fifth metatarsal
March fracture – a fracture of the distal third of one of the metatarsals occurring because of recurrent stress
Calcaneal fracture
Broken toe – a fracture of a phalanx
Cuneiform fracture – Due to the ligamentous support of the midfoot, isolated cuneiform fractures are rare. Pronation
In anatomy, pronation is a rotational movement of the forearm (at the radioulnar joint) or foot (at the subtalar and talocalcaneonavicular joints). Pronation of the foot refers to how the body distributes weight as it cycles through the gait. During the gait cycle the foot can pronate in many different ways based on rearfoot and forefoot function. Types of pronation include neutral pronation,  underpronation (supination), and overpronation. Neutral pronationAn individual who neutrally pronates initially strikes the ground on the lateral side of the heel. As the individual transfers weight from the heel to the metatarsus, the foot will roll in a medial direction, such that the weight is distributed evenly across the metatarsus. In this stage of the gait, the knee will generally, but not always, track directly over the hallux. This rolling inward motion as the foot progresses from heel to toe is the way that the body naturally absorbs shock. Neutral pronation is the most ideal, efficient type of gait when using a heel strike gait; in a forefoot strike, the body absorbs shock instead via flexion of the foot.