Anatomy
Attaches from the posterior surface of the medial malleolus, pacing obliquely backwards to the inferiomedial margin of the calcaneus.
Functions
Provides static stability to the medial ankle joint. Acts as a pulley for the flexor halluces longus, flexor digitorum longus and tibials posterior tendons. Vessels of the foot pass under the flexor retinaculum.
Clinical
A common sign of rupture to this tendon can be seen when the tendons passing under it pop out over the medial malleolus during evertion and planter flexion.
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