Topics: Knee, Anterior cruciate ligament, Tendon Pages: 3 (1167 words) Published: April 11, 2013
Ligament injuries
The dictionary definition of a ligament is ‘’ A short band of tough, flexible, fibrous connective tissue that connects two bones or cartilages or holds together a joint.’’ This basically means a ligament is a connective tissue that unlike a tendon which connects muscle to bone a ligament connects bone and also stabilised a joint. When someone damages a ligament it’s called a sprain. An example of a ligament injury is an ACL injury (Anterior cruciate ligament injury). This type of injury occurs in twisting and cutting sports and usually non-contact sport an example is basketball; in the picture Lebron James is trying to get away from the opposite defender. Both feet are planted on the floor and he’s rotating in the opposite way, this is how most ACL injuries occur. Some signs and symptoms of an ACL injury are, Pain, delayed swelling and bruising and you might here a pop or crack. To further understand the injury you have look at the anatomy of the knee. In the picture you can see the tibia and the top part of the leg the femur, and then the patella that makes up a knee joint. The knee joint is a hinge joint but unlike the hinge joint in the elbow which only allows flexion and extension the knee joint also can pivot as well. An ACL injury can occur on the anterior cruciate ligament which is between the joint. It can also occur on the Medial meniscus which cushions the 2 bones. Muscle injuries

A muscle is a bundle of tissue that can contract which makes movement or keeping a part of the body in a certain position. To understand a muscle injury you have to understand how a muscle contracts and relaxes. In the picture the Z line, actin and myosin are spaced apart when a muscle is relaxed. When the muscle contracts the Z line, Actin and myosin come further together. An example of a muscle injury is a strain, a strain occurs when the muscle fibres stretch or tear to far as when doing exercise your muscles need to far to become bigger...
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