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17 Cards in this Set
- Front
- Back
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How many joints are in the knee? |
3: Two modified hinge & 1 planar |
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Describe the function of the patella as part of the knee joint. |
Reduces wear on quadriceps tendon, keeps tendon centered, protects main joint, increases leverage of quadriceps |
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Describe the function of the femur, tibia, and their articular cartilage as part of the knee joint. |
Enlarged ends of bones increase articular surface area and articular cartilage reduces friction between bones and absorbs shock |
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Describe the role of the fibula as part of the knee joint. |
Not directly involved with joint; site of connective tissue attachments |
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Describe the role of articular discs as part of the knee joint. |
Fibrocartilage that function to improve "fit" of femur, absorb shock, and spread synovial fluid |
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What is the function of the tibial (medial) collateral ligament? |
Prevents abduction |
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What is the function of the fibular (lateral) collateral ligament? |
Prevents adduction |
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What structures help prevent hyperextension of the knee joint? |
Tendon of semimembranosus, oblique popliteal ligament, arcuate popliteal ligament, hamstrings, popliteus, and gastrochnemius |
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What two ligaments prevent gliding of the tibia? |
Anterior and posterior cruciate ligaments |
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Describe the bursa. |
(13) Connective tissue sacs lined with synovial membrane and function is to reduce friction |
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What is the function of the infrapatellar fat pad? |
Provide additional cushion |
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Why is the knee the most commonly injured joint in the body? |
Long levers and no socket. |
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What are the three C's that are commonly injured? |
Collateral- medial, Cruciate (ACL), and cartilage- medial meniscus |
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What structures strengthen the knee joint anteriorly? |
Tendon of quadriceps femoris (medial and lateral patellar retinaculum) |
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What structures strengthen the knee joint laterally? |
Tibial (medial) collateral ligament, fibular (lateral) collateral ligament, and tendons of hamstrings |
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What structures strengthen the knee joint posteriorly? |
Tendon of semimembranosus, oblique popliteal ligament, arcuate popliteal ligament, hamstrings, popliteus, and gastrochnemius |
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What structures strengthen the knee internally? |
Anterior cruciate ligament and posterior cruciate ligament |
