Flashcards in Joints of the leg, ankle and foot Deck (18):
What happens at the tibiofibular joints on dorsiflexion/plantarflexion.
Passive movement to accommodate talus.
Classify and locate proximal tibiofibular joint.
Synovial plane. Head of fibula + opsterolateral aspect of lateral tibial condyle.
Classify and locate distal tibiofibular joint.
Fibrous. (syndesmosis). Inferior ends of tibia and fibula. Prevents tibia and fibula separating in weight-bearing.
What are the functions of the interosseous membrane?
Unite tibia and fibula. Increase surface area for muscle attachment. Separate muscle compartments.
What joints are there in the foot?
Talocrural, intertrasal, tarsometatarsal, intermetatarsal, metatarsophalangeal and interphalangeal.
Classify, name and locate the ankle joint. Which movements are permitted?
Synovial hinge, talocrural, between tight mortise of tibia+fibula (held by inf. tibiafibular joint), and talus. Flexion/extension.
Where is the ankle joint capsule weakest? What ligaments strengthen it and where do they go?
Anteriorly and posteriorly to accomodate for dorsiflexion and plantarflexion. Strengthened laterally by medial and lateral collateral ligaments.
Where does the medial collateral ligament run?
Called the DELTOID LIGAMENT - very strong. Between medial malleolus of tibia to talus, cancaneus and navicular. Remember it is triangle shaped.
Where does the lateral collateral liagment run?
Lateral malleolus of fibula to the talus (talofibular ligaments) and calcaneus (cancaeofibular ligament)
Why are inversion sprains more common than eversion?
Because lateral collateral ligament is weaker than the deltoid ligament.
Which joints fall under the category of intertarsal joints?
Subtalar (talocalcaneal), mid-tarsal (talocancaneonavicular, calcaneocuboid), and others.
Which foot joints move on movement of the foot?
Subtalar and midtarsal. Movements here permit inversion/eversion.
Which movements combine to produce inversion and eversion?
inversion - adduction +pronation
Eversion - abduction + supination.
Where does the spring ligament attach?
calcaneus to naviucular
Which joints do the dorsal and plantar ligaments support?
which joints are strengthened by the long and short plantar ligaments?
cancaneus and cuboid.
Summarise the ligaments of the foot (excluding collateral ligaments at the ankle.)
Spring ligament - between calcaneus and navicular.
Long + short plantar ligaments - between calcaneus and cuboid.
Dorsal and plantar ligaments - between intertarsal joints.
Talocalcaneal ligament - between talus and calcaneus in tunnel between capsule of subtalar and talocalcaneonavicular joints.