eccentric definition anatomy
eccentric contraction, a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion.The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch.sotonic contraction muscle contraction without appreciable change in the force of contraction; the distance between the origin and insertion becomes lessened. lengthening contraction eccentric contraction.