The medial longitudinal arch of the foot is maintained by all of the following structures except :

Peroneus longus muscle maintains the lateral longitudinal arch and not medial arch. Features Medial Longitudinal arch Lateral longitudinal arch Anterior pillar Talus, navicular, 3 cuneiform and 1st, 2nd and 3rdmetatarsal Cuboid and 4th, 5thmetatarsals Posterior pillar Medial half of calcaneum Lateral half of calcaneum Main joint involved Talo calcaneonavicular joint (TCN) Calcaneocuboid joint Summit Superior aicular surface of Talus Superior aicular surface of calcaneum at the leveled Subtalar joint Extremities (piers) Tuberosity of calcaneum posteriorly and Heads of 1st, 2nd, 3rdmetatarsal anteriorly Plantar surface of calcaneum posteriorly and Heads of 4th, 5thmetatarsals anteriorly Ligament/intersegmental ties Plantar calcaneonavicular ligament (spring ligament) Long and sho plantar ligaments Tie beams Plantar aponeurosis (medial pa)Abductor hallucisMedial pa of flexor digitorum brevis Plantar aponeurosis (lateral pa)Abductor digiti minimi Slings Tibialis posteriorFlexor hallucis longusFlexor digitorum longusSling formed by tibialis anterior and peroneus longus Peroneus longus Peroneus brevis medial longitudinal arch lateral longitudinal arch