Glossary

Arch - The arch of the foot is the area of the bottom of the foot between the heel pad and toe pad.

Acrokeratosis verruciformis - a hereditary dermatosis characterized by the presence of numerous flat wart-like papules on the dorsal aspect of the hand, foot, elbow, and knee.

Ankle - the part of the leg just above the foot; the joint between the leg and the foot. It is a hinge joint formed by the junction of the tibia and fibula with the talus, or ankle bone. The bones are cushioned by cartilage and connected by a number of ligaments, tendons, and muscles that strengthen the joint and enable it to be moved. Because it is in almost constant use, the ankle is particularly susceptible to injuries, such as sprain and fracture. It is also often one of the first joints to be affected by arthritis or gout.

Ankle clonus - a series of abnormal reflex movements of the foot, induced by sudden dorsiflexion, causing alternate contraction and relaxation of the triceps surae muscle.

Athlete's foot - a fungal infection of the skin of the foot; called also tinea pedis. It causes itching and often blisters and cracks, usually between the toes. Causative agents are Candida albicans, Epidermophyton floccosum, and species of Trichophyton, which thrive on warmth and dampness. If not arrested, it can cause a rash and itching in other parts of the body as well. It is likely to be recurrent, since the fungus survives under the toenails and reappears when conditions are favorable. Although Athlete''s foot is usually little more than an uncomfortable nuisance, its open sores provide excellent sites for more serious infections. Early treatment and health care supervision insure correct diagnosis and prevention of complications. Specific diagnosis is made by microscopic examination or culture of skin scrapings for the fungus.

Pain in the area between the arch and toes, or ball of the foot, is generally called metatarsalgia. The pain usually centers on one or more of the five bones (metatarsals) in this mid-portion of the foot. Also known as dropped metatarsal heads, metatarsalgia can cause abnormal weight distribution due to overpronation.

Metatarsalgia occurs when one of the metatarsal joints becomes painful or inflamed. People often develop a callus under the affected joint. Metatarsalgia also can be caused by arthritis, foot injury (from sports, a car accident, or repeated stress), hard surfaces (cement or tile floors), and specific footwear (rigid-soled work boots).

A simple change of shoes may solve the problem. In more severe cases, custom orthotics may be prescribed to alleviate the pain and prevent overpronation.

 




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