The Ligaments Of The Foot Flashcards
What is the cutaneous innervation to the leg?
Saphenous nerve from femoral branch
Lateral sural cutaneous nerve, superficial fibular nerve and deep fibular nerve, a branch of the common fibular nerve
Medial sural cutaneous nerve, a branch of the tibial nerve.
What is the cutaneous innervation to the foot?
Medial plantar nerve and lateral plantar nerve, the terminal divisions of the tibial nerve.
Deep fibular nerve.
What is the sural nerve?
Joining of the common fibular nerve and tibial nerve
What is the flexor retinaculum of the foot?
Sheet of connective tissue from the medial malleolus of the fibula to the Calcaneous, forming the roof of the tarsal tunnel.
What is the plantar aponeurosis?
Connective tissue sheath which covers the sole of the foot, from the calcaneus to the metatarsals.
What is the ankle joint?
Talocrural joint, formed of the articulation between the talus and the tibia and fibula. These are connected via the anterior and posterior talofibular ligaments that limit the talus movements.
It allows dorsiflexion and plantarflexion.
What is the calcaenus?
Heel bone of the foot which contains a bony protuberance called the sustentaculum talis that receives the Spring igament nd deltoid ligament. The calcaenus has attachment posteriorly from the Achilles tendon, formed of the gastrocnemius and soleus muscle.
Which joint in the foot allows for plantar flexion and Doris flexion?
Tibiotalar joint.
Which joint in the foot allows for inversion and eversion?
Subtalar joint between the talus and the calcaenus below.
What are the tarsals of the foot?
Talus
Calcaenus
Medial cuneiform
Intermediate cuneiform
Lateral cuneiform
Cuboid
Navicular
What is the role of the superior extensor retinaculum?
Located between the fibula and tibia which holds the extensor tendons in position of digitorum longus, hallucis longus, peroneus tertius and tibialis anterior.
What is the role of the inferior extensor retinaculum?
Y shaped connective tissue which holds the extensor tendons in position of extensor digitorum longus, extensor hallucis longus, peroneus tertius and tibialis anterior.
What is the tarsal tunnel?
Runs from the medial malleolus to the calcaneous tuberosity. Contains:
Tom: tibialis posterior
Dick: flexor Digitorum longus
And: posterior tibial Artery, tibial Nerve
Harry: flexor Hallucis longus
What does the popliteal artery give rise to?
Anterior tibial artery which passes through spaces in the interosseus membrane between the tibia and fibula to move anteriorly and -> dorsalis pedis artery.
Posterior tibial artery -> Fibular artery
What is the role of the anterior talofibular ligament?
Limits anterior translation of the talus during plantar flexion and prevents inversion of foot during plantar flexion.
From lateral malleolus to talus. It is the most commonly injured
What is the role of the posterior talofibular ligament?
One of the strongest ankle ligaments which limits posterior translation of the foot on the tibia and prevents rotatory subluxation and eversion along with deltoid.
From malleolar fossa of fibula to talus
What is the role of the calcaneofibular ligament?
Limits inversion of ankle in dorsiflexion.
From lateral malleolus to the calcaneus
What actions are involved in ankle supination?
Inversion, dorsiflexion and adduction.
What actions are involved in ankle pronation?
Eversion, plantarflexion and abduction.
What is the spring ligament?
Ligament from calcaenus to navicular bone, involved in supporting talus by distributing weight and maintaining longitudinal arch of foot.
What supports the longitudinal arch of the foot?
Spring ligament
Short and long Plantar ligament
Plantar aponeurosis
What is the malleolar mortise?
Socket between the lateral malleolus and medial malleolus of the tibia and fibula. Here, the trochlea of talus is found where the talocrural joint is fixed.
What is the strongest ankle ligament?
Deltoid ligament.
How does ankle plantarflexion occur?
Muscles of posterior leg compartment such as gastrocnemius, soleus and plantaris, innervated by the tibial nerve
Muscles from lateral leg compartment such as the fibularis longus and fibularis brevis, innervated by the superficial fibular nerve.
How does ankle dorsiflexion occur?
Anterior leg compartment muscles such as tibialis anterior, extensor digitorum longus, fibularis tertius and extensor hallucis longus on the talocrural joint