It is the key stabilizing muscle of the lower leg.
The tendon of tibialis posterior descends posterior to the medial malleolus and to the plantar surface of the foot where it inserts on to the tuberosity of the navicular, the first and third cuneiforms, the cuboid and the second, third and fourth metatarsals.
Tibialis posterior also has a major role in supporting the medial arch of the foot and therefore dysfunction can lead to flat feet in adults (as well as unopposed eversion as inversion is lost, leading to a valgus deformity).
New foot deformity study findings have been reported by researchers at University of Texas.(Clinical report)
Jan 21, 2009; According to recent research from the United States, "The purpose of this study was to analyze the prevalence of spring ligament...
Research results from University College, Institute of Rehabilitation Medicine update knowledge of life sciences.(Report)
Mar 17, 2010; Research findings, 'Needle insertion into the tibialis posterior: ultrasonographic evaluation of an anterior approach,' are...