Since robots and robotics are still in the developing stages, a considerable amount of research is being pursued in this line. Depending on the area in which robots are to be used, robotics includes disciplines such as biology, medical science, psychology, agriculture, mining, outer space engineering etc.
Powered prosthetic leg. Source: M. Goldfarb, Vanderbilt U. Rehabilitation engineering is the use of engineering principles to 1) develop technological solutions and devices to assist individuals with disabilities and 2) aid the recovery of physical and cognitive functions lost because of disease or injury.