flexor retinaculum of lower limb (lacinate ligament, retinaculum of flexor muscles)

Introduction

A wide band passing from the medial malleolus to the medial & upper border of the calcaneus & to the plantar surface as far as the navicular bone.

Function

To hold in place the tendons of:

• tibialis posterior
• flexor digitorum longus
• flexor hallucis longus

More general terms

• flexor retinaculum (transverse carpal ligament)