KIN-10 Chapter Notes - Chapter 12: Collagen, Sprain, Joint Stability
Document Summary
Unlike muscles, ligaments are noncontractile tissues (they cannot contract or shorten) They resist stretching and are typically damaged when forces are exerted that. May also damage surrounding blood vessels, muscles, tendons, or nerves. Caused by the forcible wrenching or twisting of a joint that stretches or tears its ligaments but does not dislocate the bones. Results in considerable swelling, which results from hemorrhage of ruptured blood vessels. Most often sprained joint is the ankle joint. The numerous small joints between the vertebrae of the lower back are also sites of frequent strains. Ligament injuries are graded on a scale of i to iii. Involve stretching of a ligament with microscopic tearing. Little swelling, little or no loss of function of joint stability, of collagen fibers and the person can fully or partially bear weight. Involve stretching of a ligament with partial tearing, moderate to severe swelling, bruising, moderate functional loss, mild to moderate joint instability, and difficulty bearing weight.
