KINES 300 Lecture Notes - Lecture 7: Lower Extremity Of Femur, Lateral Meniscus, Common Peroneal Nerve
22 May 2020
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Document Summary
Rom: 10 of hyperextension to 145 of flexion. 10 of rotation occurs in last 30 of extension. Screw home mechanism is caused by: medial femoral condyle shape, tension in the acl and lateral pull of the quads. Open chain- tibia is concave mover: flexion: tibia glides posterior, extension: tibia glides anterior. Closed chain- femur is convex mover: flexion: femur rolls posterior, glides anterior, extension: femur rolls anterior, glides posterior. Descending stairs requires more mobility of the leg left on the stair. When injured, step-to pattern involves bad leg going down first (only requires 0 flexion) Essentially a plane joint that is not very functionally significant. Peroneal nerve wraps around head of fibula so nerve involvement with injury, bad sprain or fracture. Function: protect the capsule, shock absorption, increase wb area, increase joint congruency, facilitate joint lubrication, guide femoral motion. Coronary ligaments attach to capsule at periphery. Anterior horn of medial meniscus connected to acl.
