Structure passing deep to flexor retinaculum is
The flexor retinaculum is a thickened band of deep fascia on the posteromedial aspect of ankle. The deep relations of flexor retinaculum from above downwards or medio laterally are tibialis posterior, flexor digitorum longus , posterior tibial aery , tibial nerve ,flexor hallucis longus. Reference: clinical anatomy for students a problem-solving approach, Neeta v Kulkarni, page no. 865
Post tibial aery
Long saphenous vein
Tibialis anterior tendon
Peroneus teius
Upper limb