ankle joint ppt
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Introduction Synovial joint- Hinge variety Involves: 1.Talus of foot
2.Tibia
3.Fibula Movements- Dorsi flextion of foot &
Planter flexion of foot
Ankle joint
Tibia
Lower end Includes 5 surfaces
1. Ant surface
2.medial surface
3. Lateral surface
4. Inferior surface
5. Posterior surface Blood supply: Nutrient artery
Fibula
Lower end ( lateral malleolus) It has 4 surfaces
1. Anterior
2. Posterior
3. Medial
4. Lateral
Talus Parts- 1.Head 2.Neck 3.Body Head Anterior surface articulates with navicular bone . Inferior surface articulates with calcaneum & spring
ligament. Body Superior surface Inferior surface Medial surface Lateral surface
Attachments of Talus:
Dorsal surface – Capsular ligament Neck of talus – Ant.talofibular ligament Medial tubercle – Deltoid ligament
Articular surfaces of ankle joint :Upper Articular surface :
1. Lower end of tibia
2. Lower end of fibula
3. Transverse tibiofibular ligament
Inferior Articular surface :
Upper , medial & lateral aspects of tibia
Stability of Ankle joint is ensured by :
1.Close interlocking of articular surfaces.
2.Strong collateral ligaments.
3.Tendons that cross the joint.
Depth of superior articular socket is formed by :
1.Medial & Lateral malleoli.
2.Transverse tibiofibular ligament
Factors that tend to displace tibia & fibula forward over the talus are :
1.Forward pull of tendons. 2.Pull of gravity.
Displacement is prevented by : 1.Talus (wedge shape ) 2.Posterior border of lower end of tibia. 3.Inf.transverse tibio fibular ligament. 4.Tibio calcaneum,post.tibio talar,calcaneofibular
& post.talofibular ligaments
Ligaments of Ankle Joint : Joint is supported by : 1.Fibrous capsule 2.Medial/Deltoid ligament 3.Lateral ligament.
Medial /Deltoid ligament : Attachments : Apex attached to medial malleolus. Based on inferior point of attachments medial ligament is
divided into: 1.Tibio navicular part 2.Tibio calcaneal part 3.Post.tibiotalar part 4.Ant.tibiotalar part
Deltoid ligament
Lateral Ligament :
Consists of three separate ligaments :
1.Ant.talofibular ligament.
2.Post.talofibular ligament.
3.Calcaneofibular ligament.
Lateral ligament
Relations of Ankle Joint : Anteriorly :
Posterior Relations of Ankle Joint:
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