KNES 315 Lecture Notes - Lecture 9: Ultimate Tensile Strength, Myocyte, Fibroblast
Document Summary
Repair/ proliferative phase (approx 3 days following injury- 6-8 weeks) Begins when the hematoma size decreases enough to permit room for growth of new tissue. Fibroblasts- immature connective tissue cells released into area by tge exudate. By day 4-5, a weak, vascular connective tissue in area. Key-- fibroblasts need to know where to lay down the collagen. Movement provides natural tensions in the healing tissue, increasing strength. Relatively less tensile strength (30% less) than normal healthy tissue and less functional. Shortening of tissue yielding a decrease in flexibility. Muscle fibers do not reproduce in response to injury but can regenerate some of the fibers. As such, adhesions develop within the muscles. Severe cases, may only re gain 50% of pre injury strength. Ligaments and tendons have minimal repair cells. As such, healing can take more than a year. Significant tensile force can cause elongation of fibers. In case of ligaments, this can be problematic.
