Artificial organ almost always preceded by extensive experiments with animals. Initial testing in humans is frequently limited to those either already facing death or who have exhausted every other treatment possibility. Artificial arms and legs, or prosthetics, are intended to restore a degree of normal function to amputees. Mechanical devices that allow amputees to walk again or continue to use two hands have probably been in use since ancient times, the most notable one being the simple peg leg. Since then, the development of artificial limbs has progressed rapidly. New plastics and other materials, such as carbon fiber have allowed artificial limbs
Nobel Committee for Physiology or Medicine working body that invites nominations and evaluates candidates nominated for the Nobel Prize. The final decision to award the Nobel Prize for Physiology or Medicine is taken by the Nobel Assembly at Karolinska Institutet and based on a proposal from the Nobel Committee. Over the years, there have been many controversies concerned with the process by which nominations and awards of the Nobel Prize. To avoid any possible appearance of bias, the Nobel Committee states that once 50 years has passed since the time of nomination, it will make the criteria for the selection of award recipients public. Currently (August