Bathed in light
By Anne Locker The development of electricity for medical therapy and devices dates back to the beginnings of the science of electromagnetism and the beginnings of modern medicine. In 1791, Luigi Galvani discovered the role electricity plays in the body – at first, by twitching frogs’ legs – a phenomenon he called ‘animal electricity’. His fellow scientist Alessandro Volta built on Galvani’s work (although he disagreed with the nature of electricity) and developed the first electric battery in 1800, which meant an electric current could be easily produced for further experimentation and research. Michael Faraday ’s description of a ‘dark space’ around the cathode in his electrical experiments led to the discovery of X-rays by Wilhelm Roentgen in 1895, and the development of the telephone…