ANAT30007 Lecture Notes - Lecture 20: Triceps Surae Muscle, Tarsometatarsal Joints, Popliteal Fossa

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT30007
• Professor: All

Document Summary

Interosseous membrane connects the shafts of the tibia and fibula (obliquely oriented fibres) Fibula lies posterolateral to tibia: main role: attachment site for muscles, no weight bearing role, distal end enlarges forms lateral malleolus (more prominent and posterior than medial malleolus) Superior tibiofibular joint plane type synovial joint: allows for gliding movement b/w tibia and fibula, restricted by tense joint capsule, strengthened by anterior and posterior ligaments of fibula head. Inferior tibiofibular syndesmosis: fibrous joint with bony elements united by ligaments, strengthened anteriorly by anterior tibiofibular ligament and posteriorly by posterior tibiofibular ligament. Distal ends of tibia and fibula articulates with trochlea of talus -> form ankle mortis: hinge joint flexion/extension. Inferior surface of tibia forms roof (main mechanism of weight transfer to talus) Medial and lateral malleolus form medial and lateral walls: malleoli grip either side of the talus tightly. Anterior talofibular ligament (flat, weak band from lateral malleolus to neck of talus)