Knee Joints

Description/Movement

• The knee joint is a hinge joint, meaning it is able to bend back and forth. In addition, the knee joint support the body's weight and move the leg relative to the thigh
• Walking, running, sitting, and standing are movements all associated with this joint, as they require bending and extending.
• The femur, patella, and tibia support this joint. Two ligaments also support this joint; they are the anterior and posterior cruciate ligament (ACL/PCL)

MUSCles,Tendons,Ligaments,Bones, Tissue

• As mentioned before, the tibia, fibula, patella, and femur are the bones associated with the joint. In addition, the ACL and the PCL are the ligaments associated with the joint.
• The muscles of the knee joint include the vastus medialis/lateralis, gastrocnemius, tibialis anterior, and the short head of the biceps femoris

An Abnormal Condition

• The abnormal condition that will be described will be the ACL tear
• This is the most common abnormality found in many athletes. The ACL tears by a sudden twisting motion
• The tear will split the ligament and will cause the knee joint to become unstable. Some times, a brace of some kind will suffice, but an ACL tear is so severe that reconstructive surgery is required.

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Sources

• "Knee Joint." InnerBody. Inner Body, n.d. Web. 23 Nov. 2015.
• "Knee (Human Anatomy): Images, Function, Ligaments, Muscles." WebMD. WebMD, n.d. Web. 23 Nov. 2015.
• "Knee Joint." Knee Joint. N.p., n.d. Web. 23 Nov. 2015.
• "Anterior Cruciate Ligament (ACL) Injuries-OrthoInfo - AAOS." Anterior Cruciate Ligament (ACL) Injuries-OrthoInfo - AAOS. N.p., n.d. Web. 23 Nov. 2015.