Scientists have used magnetic nanoparticles to directly control physical movements of mice. Using a technique called Magneto-Thermal Stimulation, researchers activate sections of the brain that cause mice to run, rotate or lose control of the extremities.
Researchers at the University of North Carolina at Chapel Hill have developed a method which uses light to control protein activity inside live cells with the flick of a switch. According to the researchers, the technique, developed in the early 2000s, uses light to activate and deactivate proteins that could turn brain cells on and off.
One of the biggest cause of disability is the nerve damage which is also irreversible as nerve cells do not have the ability to divide or regenerate.