Ankle Joint_Inversion and Eversion Flashcards
What type of joint is the ankle joint?
The ankle joint is a synovial hinge joint.
What bones form the ankle joint?
The ankle joint is formed by the tibia, fibula, and talus.
What are the primary movements of the ankle joint?
The primary movements of the ankle joint are dorsiflexion and plantarflexion.
What is inversion of the foot?
Inversion is the movement that turns the sole of the foot medially.
What is eversion of the foot?
Eversion is the movement that turns the sole of the foot laterally.
What joints contribute to inversion and eversion of the foot?
The subtalar joint and transverse tarsal joint contribute to inversion and eversion.
What ligaments support the ankle joint during inversion and eversion?
The deltoid ligament, lateral ligament complex, and interosseous ligaments support the ankle joint.
What is the role of the subtalar joint in foot movements?
The subtalar joint allows movements of inversion and eversion by permitting gliding between the talus and calcaneus.
What bones form the subtalar joint?
The subtalar joint is formed by the talus and calcaneus.
What are the primary ligaments stabilizing the subtalar joint?
The primary ligaments stabilizing the subtalar joint include the interosseous talocalcaneal, cervical, and lateral talocalcaneal ligaments.
What are the main muscles responsible for inversion of the foot?
The main muscles responsible for inversion are the tibialis posterior and tibialis anterior.
What are the main muscles responsible for eversion of the foot?
The main muscles responsible for eversion are the fibularis longus, fibularis brevis, and fibularis tertius.
What is the innervation of the muscles responsible for inversion?
The tibial nerve innervates the tibialis posterior, and the deep fibular nerve innervates the tibialis anterior.
What is the innervation of the muscles responsible for eversion?
The superficial fibular nerve innervates the fibularis longus and fibularis brevis, while the deep fibular nerve innervates the fibularis tertius.
Which nerve injury can impair foot inversion?
Damage to the deep fibular nerve can impair foot inversion.
Which nerve injury can impair foot eversion?
Damage to the superficial fibular nerve can impair foot eversion.
What role does the transverse tarsal joint play in foot movements?
The transverse tarsal joint enhances foot inversion and eversion by increasing the range of motion.
What bones form the transverse tarsal joint?
The transverse tarsal joint is formed by the talonavicular and calcaneocuboid joints.
How do the calcaneocuboid and talonavicular joints contribute to foot movements?
The talonavicular joint aids in inversion, while the calcaneocuboid joint stabilizes the lateral foot during eversion.
What is the clinical significance of excessive inversion of the foot?
Excessive inversion can cause sprains or rupture of the lateral ankle ligaments.
What is the clinical significance of excessive eversion of the foot?
Excessive eversion can lead to deltoid ligament injuries or avulsion fractures.
Which ligaments are most commonly injured during excessive inversion?
The anterior talofibular ligament is the most commonly injured ligament in excessive inversion.
Which ligaments are most commonly injured during excessive eversion?
The deltoid ligament is commonly injured in excessive eversion.
What is the function of the deltoid ligament in ankle stability?
The deltoid ligament stabilizes the medial side of the ankle and resists eversion forces.
What is the function of the lateral ligament complex in ankle stability?
The lateral ligament complex stabilizes the lateral side of the ankle and resists excessive inversion.
What are the components of the lateral ligament complex of the ankle?
The lateral ligament complex includes the anterior talofibular, posterior talofibular, and calcaneofibular ligaments.
How does the orientation of the foot affect the efficiency of inversion and eversion?
A plantarflexed foot is more prone to inversion injuries, while a dorsiflexed foot provides greater stability.
What is the role of the fibularis muscles in maintaining foot balance?
The fibularis muscles maintain foot balance by preventing excessive inversion and supporting the lateral arch.
How does the tibialis posterior muscle contribute to foot inversion?
The tibialis posterior muscle supports the medial arch and controls foot inversion.
What is the role of the tibialis anterior muscle in foot movements?
The tibialis anterior muscle assists in dorsiflexion and inversion of the foot.
