BIO 105 Lecture Notes - Lecture 9: Anterior Cruciate Ligament Injury, Posterior Cruciate Ligament, Medial Collateral Ligament
Document Summary
All have general features, but some also have unique structural features, abilities, and weaknesses. Consists of three joints surrounded by single cavity: femoropatellar joint. Allows gliding motion during knee flexion: lateral joint and 3. Lateral and medial joints together are called tibiofemoral joint. Joint between femoral condyles and lateral and medial menisci of tibia. Hinge joint that allows flexion, extension, and some rotation when knee partly flexed. Joint capsule is thin and absent anteriorly. Anteriorly, quadriceps tendon gives rise to three broad ligaments that run from patella to tibia. Medial and lateral patellar retinacula that flank the patellar ligament. Doctors tap patellar ligament to test knee-jerk reflex. At least 12 bursae associated with knee joint. Capsular, extracapsular, or intracapsular ligaments act to stabilize knee joint. Capsular and extracapsular ligaments help prevent hyperextension of knee. Fibular and tibial collateral ligaments: prevent rotation when knee is extended. Intracapsular ligaments reside within capsule, but outside synovial cavity.
