LEA Joints of the Foot and Ankle Part 1 Flashcards
Distal (inferior) tibiofibular joint
- Fibular notch and medial triangular area of fibula
- Syndesmosis, amphiarthrosis
Ligaments prevent
separation of tibia and fibula, and talar wedging
Distal anterior tibiofibular ligament (trapezoid shape)
Anterior border of fibular notch to anterior edge of triangular area (fibula)
Interosseous tibiofibular ligament is a continuation of
the Interosseus membrane
Interosseous tibiofibular ligament is a strong ligament found
centrally, within the articulation
Distal posterior tibiofibular ligament (triangular shape)
Posterior border of fibular notch to posterior edge of triangular area(fibula)
Inferior transverse tibiofibular ligament is the most inferior aspect of
distal posterior tibfib, located posterior to ankle joint
inferior transverse tibiofibular ligament attaches
- to posterior-inferior aspect of fibular notch (sometimes reaches medial malleolus)
- lateral malleolar fossa (superior edge) on the fibula
Articular cartilage on deep surface of inferior transverse tibiofibular ligament that articulates with
- posterior lateral aspect of trochlea
- Deepens articular surface
distal tibiofibular joint blood supply:
perforating fibular,
anterior and posterior lateral malleolar arteries
posterior intermalleolar ligament is located
- posterior to ankle joint
- between transverse tibiofibular and posterior talofibular ligaments
posterior intermalleolar ligament attaches
- superior edge fibular malleolar fossa and:
- Posterior tibia and medial malleolus (via septa of flexor retinaculum
- Lateral and medial talar processes
the posterior intermalleolar ligament is tensed during
dorsiflexion
the posterior intermalleolar ligament can be cause of
posterior impingement
articulation between talus and the tibia and fibula
the talocrural/tibiotalar/ ankle joint
the talocrural joint is a __ joint
synovial hinge joint
diarthrosis
primarily dorsi and plantar flexion
the ankle joint is more mobile/less stable in
plantar flexion
trochlea is more narrow __
posteriorly
arterial supply of the ankle joint
the medial and lateral malleolar plexuses
ankle mortise
concavity formed by the tibia, fibula, and inferior transverse tibio-fibular ligament
talus articulates with
mortise
the ankle joint capsule attaches to
Borders of tibia and malleoli
articular margins of trochlea,
talar neck on the dorsum
the joint capsule is weak
anteriorly and posteriorly
joint capsule is reinforced by
collateral ligaments of the ankle medially and laterally
the joint capsule anteriorly attaches to
the neck of the talus
__ lines fibrous capsule
synovium
medial collateral ligament of the ankle function (deltoid ligament)
- stabalizes the ankle
2. limits the ankle eversion and external rotation and lateral translation
the deltoid (MCL of the ankle) ligament is divided into
superficial and deep layers consisting of 3-6 ligaments (blends with the capsule, thick and strong)
the superficial MCL of the ankle
- tibionavicular ligament
- Tibiospring Ligament
- Tibiocalcaneal Ligament
- Superficial posterior tibiotalar ligament
Tibionavicular ligament
From the anterior border of anterior colliculus to the dorsal navicular tuberosity
Tibionavicular ligament crosses
ankle joint & talonavicular portion of mid tarsal joints
tibiospring
Anterior colliculus (proximal and posterior to tibionavicular) to the spring ligament (plantar calcaneonavicular ligament)
the tibiospring crosses
the ankle joint and subtalar joint
Tibiocalcaneal ligament
from the anterior colliculus and intercollicular groove to the medial and posterior aspect of sustentaculum tali
Tibiocalcaneal ligament is located deep to
FDL nd TP
the strongest superficial deltoid ligament is
tibiocalcaneal
tibiocalcaneal ligament crosses the
ankle joint and subtalar joint
superficial posterior tibiotalar ligament
From the posterior colliculus and intercollicular groove to the medial tubercle of posterior process of talus
superficial posterior tibiotalar ligament can blend with
deep posterior talotibial
superficial posterior tibiotalar ligament is taut when
dorsiflexion: limits dorsiflexion and posterior displacement of the talus
superficial posterior tibiotalar ligament crosses
the ankle joint
the deep layer of the MCL of ankle only crosses
the ankle joint