Ligaments

Recently we talked generally about what is a sprain and as it is, since it is a very common injury, but i'm not sure if everyone knows what we mean when we talk about it. To be an injury that affects the ligaments, i think it is interesting also to clarify, if anyone has, the doubt of what are the ligaments?
Thus, in a general way, we can say that the ligaments structures are formed by fibrous tissue. Have qualities of elasticity and resistance, and are forming a very important part of the joints. The ligaments are important for their function:
are responsible for uniting the bony segments that form the joints. In addition, limiting the movement of the joint, not to go beyond what can be moved without being damaged, and also act by directing the movement, so that occurs within normal physiological limits.
The ligaments vary from one person to another in terms of its flexibility. There are those who have any more tense, and in other cases hyperlaxity exists: people who are highly mobile, they are very agile and can reach a articular mobility very wide, but have a higher risk of injury, since their ligaments do not hinder the movement that can cause damage.
The ligaments have certain similarities in your composition with the muscle tendons. That is why, in the operations of ligaments, such as the knee, often used a tendon to create a new ligament that replace the one damaged. Are delicate structures that, as we have already spoken in vitonica, if injured suffer from what is called as sprains.
In the video who heads the text displays a 3d animation of the ligaments of the knee, and looks like behave during the movement of flexion and extension.