Posterior Tibial Dysfunction / Tear
Tendons are fibrous tissue bands that connect muscles to bones. The Posterior Tibial Tendon is a strong band of fibrous tissue. It connects the Posterior Tibial Muscle to multiple locations on the inner and bottom sides of the arch. The function of this tendon is to help maintain the arch height (keep it from collapsing), and to help prevent pronation (a rolling out of the foot at the ankle, forcing one to put abnormal amounts of weight on the inner surface of the foot when walking). When this tendon becomes swollen, inflamed, and painful it is “sick,” and it cannot function properly. The terms for this condition are Tendonitis and Dysfunction.
The Posterior Tibial Muscle is situated on the back of the leg. Just above the prominent inner ankle bone, the medial malleolus, the muscle turns into a fibrous tissue band called the Posterior Tibial Tendon. This tendon runs behind the inner ankle bone, and enters the foot, traveling forward along the inner edge of the arch. Its main insertion is into the inner and bottom surfaces of the Navicular bone. The Navicular is a key structural component of our arch. The Posterior Tibial Tendon helps to maintain the height of the arch, and to prevent the foot from pronating, by pulling on the inner and bottom sides of the Navicular. This stabilizes and supports the foot in its normal or neutral position.