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June 02 2015

stephinesvedine

Overpronation Of The Foot

Overview

n a normal functioning ankle and foot there should be 15- to 20-degrees of ankle dorsiflexion present (leg moving forward on top of the foot; or, same as the foot bending backward toward the leg) as well as 60- to 65-degrees of first toe extension (bending backward). Foot pronation (turning downward or inward) and supination (turning upward or outward) are normal and needed movements for proper function during the gait cycle. All feet must do this and do it well in order to minimize the forces that the body has to deal with during walking or running, and also to create the lever that is needed for propulsion.Over-Pronation

Causes

For those not familiar with the term pronation, you might be familiar with terms related to shoes and pronation such as ?motion control?, ?stability,? and ?neutral cushioned.? The terms motion control and stability are typically associated with the word ?over-pronation? or a foot that is supposedly pronating too much and needs correction. According to the running shoe industry, ?over-pronation? is a biomechanical affliction evident when the foot and or ankle rolls inward past the vertical line created by your leg when standing.

Symptoms

If ignored, overpronation can lead to complications such as hammer toes, corns and calluses, shin splints, hallux rigidus and many more foot and lower leg problems. Hammer toes appear when the toes are placed under too much pressure and the ligaments and muscles in the toes begin to reduce in size, leading to the curvature of the toes and making them look like little hammers. Overpronators can develop hammertoes if they don?t wear an appropriate pair of shoes. Corns and calluses also appear as a result of overpronation. They form in response to excess pressure, and overpronators may find that they have excessive hard skin on the balls of the feet and inside edge of the big toe. It is the body?s way of protecting against excessive forces and friction. They can be painful.

Diagnosis

Your healthcare provider will ask about your symptoms, medical history, and activities and examine your feet. Your provider may watch you walk or run. Check the motion of your feet when they strike the ground. Look at your athletic shoes to see if they show an abnormal pattern of wear.Pronation

Non Surgical Treatment

Overpronation is usually corrected with orthotics and/or strengthening exercises for the tibialis posterior. Massage treatment can relieve myofascial trigger points in the tibialis posterior, and other muscles, and address any resulting neuromuscular dysfunction in the leg or foot. Biomechanical correction of overpronation might require orthotics, neuromuscular reeducation, or gait retraining methods, as well. Stretching the gastrocnemius and soleus muscles will reduce hypertonicity in these muscles and also is essential for effective treatment. Because of impacts throughout the remainder of the body, the detrimental effects of overpronation should not be overlooked.

Surgical Treatment

Subtalar Arthroereisis. The ankle and hindfoot bones/midfoot bones around the joint are fused, locking the bones in place and preventing all joint motion. This may also be done in combination with fusion at other joints. This is a very aggressive option usually reserved for extreme cases where no joint flexibility is present and/or the patient has severe arthritic changes in the joint.

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