what are the 4 major ligaments of the knee?
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['Anterior cruciate ligament (ACL). ... ', 'Posterior cruciate ligament (PCL). ... ', 'Medial collateral ligament (MCL). ... ', 'Lateral collateral ligament (LCL).']
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The MCL splits slightly at the knee joint and some fibers also insert onto the medial meniscus (cushion inside the knee). Due to attachment of the MCL on the medial meniscus, MCL sprains may also have an associated medial meniscus tear.
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The main cause of LCL injuries is direct-force trauma to the inside of the knee. This puts pressure on the outside of the knee and causes the LCL to stretch or tear.
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['Anterior cruciate ligament (ACL). The ligament, located in the center of the knee, that controls rotation and forward movement of the tibia (shin bone).', 'Posterior cruciate ligament (PCL). ... ', 'Medial collateral ligament (MCL). ... ', 'Lateral collateral ligament (LCL).']
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Tearing of the ACL or anterior cruciate ligament is a typical snowboarding knee injury. The ACL forms part of four major knee ligaments. The ACL can tear when a snowboarder lands on a bent knee then twisting it or landing on an overextended knee. A popping sound can be heard and the knee will give out.
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Today, we're going to look at the four main organs of the skeletal system: bones, cartilage, ligaments, and tendons.
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The muscles of the knee include the quadriceps, hamstrings, and the muscles of the calf. These muscles work in groups to flex, extend and stabilize the knee joint.
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['Fractures. Any of the bones in or around the knee can be fractured. ... ', 'Anterior cruciate ligament injuries. Share on Pinterest ACL injuries can range from grade 1 to 3 in severity. ... ', 'Dislocation. ... ', 'Meniscal tears. ... ', 'Bursitis. ... ', 'Tendonitis. ... ', 'Tendon tears. ... ', 'Collateral ligament injuries.']
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['Gliding joints (or planar joints) – e.g. the carpals of the wrist.', 'Hinge joints – e.g. the elbow (between the humerus and the ulna) and knee.', 'Pivot joints – e.g the wrist.', 'Condyloid joints (or ellipsoidal joints) – e.g. the thumb (between the metacarpal and carpal)', 'Saddle joints – e.g. the shoulder and hip joints.']
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The muscles surrounding the knee function to both move and stabilize the joint. The two main muscle groups are the quadriceps on the anterior side of the knee and femur, and the hamstrings on the posterior side.
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The knee is composed of 4 bones: the femur, tibia, fibula and patella. All these bones are functional in the knee joint, except for the fibula.
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['Synarthroses (immovable). These are fixed or fibrous joints. ... ', 'Amphiarthroses (slightly movable). ... ', 'Diarthroses (freely movable).']
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['Swelling and stiffness.', 'Redness and warmth to the touch.', 'Weakness or instability.', 'Popping or crunching noises.', 'Inability to fully straighten the knee.']
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The PCL and ACL are intracapsular ligaments because they lie deep within the knee joint. They are both isolated from the fluid-filled synovial cavity, with the synovial membrane wrapped around them. The PCL gets its name by attaching to the posterior portion of the tibia.
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['Achilles Tendonitis or Tear. The largest tendon in the body, the Achilles connects the two primary calf muscles to the bone in the heel. ... ', 'Ankle Sprain. ... ', 'Stress Fractures of the Foot. ... ', 'Fractures of the Ankle. ... ', 'Plantar Fasciitis.']
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The most common causes of knee pain are related to aging, injury or repeated stress on the knee. Common knee problems include sprained or strained ligaments, cartilage tears, tendonitis and arthritis.
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['abdominals.', 'back muscles.', 'gluteal muscles.', 'quadriceps.', 'hamstrings.', 'calves.']