Ligaments of the leg, ankle and foot Flashcards
Attachments of ligaments and function (action prevention)
4 ligaments of the deltoid ligament
- tibionavicular
- tibiocalcaneal
- anterior tibiotalar
- posterior tibiotalar
Tibionavicular ligament
Tibia + Navicular
- limits excessive eversion in plantar flexion
- prevents inward displacement of head of talus
Tibiocalcaneal ligament
Tibia + Calacanues
- limits eversion
- prevents valgus displacement of ankle
Posterior tibiotalar ligament
Tibia + talus
- resists dorsiflexion
Anterior tibiotalar ligament
Tibia + talus
- resists plantarflexion
- limits eversion in dorsiflexion
Spring ligament (plantar calcaneonavicular ligament)
Sustentaculum tali + navicular
Maintains the longitudinal arch of the foot
Anterior talofibular ligament
lateral malleolus + talus
- resists foot inversion
- resists medial (internal) rotation of the talus within the ankle mortise
- resists anterior shift of the foot in anatomical position (anterior shift of the talus)
Calacaneofibular ligament
lateral malleolus + lateral part of calcaneus
- resists extreme inversion and dorsiflexion
Posterior talofibular ligament
back of lateral malleolus + back of talus
- limits posterior shift of the talus (or anterior shift of the fibular-tibia)
- limits external rotation of the talus (or internal rotation of the fibula)
Short plantar ligament (plantar calcaneocuboidal)
plantar side of calcaneus + cuboid
- helps maintain the longitudinal arches of the foot
Long plantar ligament (plantar calcaneometatarsal)
plantar side of calcaneus + bases of lateral metatarsals
- helps support the longitudinal arches of the foot
- converts the groove of cuboid into a tunnel for tendon of fibularis longus to pass
Bifurcate ligament
calcaneus + cuboid + navicular
just attaches bones
Interosseous talocalcaneal ligament
inside the tarsal sinus
calcaneal sulcus + talar sulcus
- serves as a fulcrum about which movements between the talus and calcaneus take place
Plantar fascia (plantar aponeurosis)
underside of calcaneus + base of proximal phalanges
- heightens the arch of the foot by lengthening when the metatarsophalangeal joint passively extends during walking
- windlass effect*
Intertarsal ligaments
join tarsals together