IX. Ligaments and Tendons（第九。）.pdfVIP

Ligaments and Tendons IX . Ligaments and Tendons [See a/so pg. 199] Affects of Immobilization and Motion in the Injured Tendon (Chicken) Albert J . Banes Purpose Tendon injuries constitute an increasing proportion of trauma cases University of North Carolina reported at our hospital, yet research in tendon healing has been neglected . There Chapel Hill, NC 27514 is a strong clinical impression that exercise speeds healing in an injured tendon. Sponsor : National Institutes of Health Early motion of the affected tendon favorably influences collagen synthesis and maturation, particularly the quantity of and types of collagen crosslinks formed. The variety and amount of collagen crosslinks present are directly related to the strength and mobility of the healing tendon . Without the appropriate types of crosslinks in the appropriate locations within collagen molecules, connective tissue would literally fall apart . On the other hand, too many crosslinks in joint tissue or tendon can restrict mobility . Since the tensile strength of tendons is dependent on the nature of the collagen, and physical activity strengthens tendons, exercise must favorably alter the crosslink chemistry of healing tendons. Moreover, a study of how cultures of tendon cells react biochemically to stress in vitro will indicate how stress in vivo acts to strengthen healing tendons. Exercise Effects on Tendon Repair (Rabbits, Chicken