Gustav Fechner
Fechner, along with Wilhelm Wundt and Hermann von Helmholtz, is recognized as one of the founders of modern experimental psychology. His clearest contribution was the demonstration that because the mind was susceptible to measurement and mathematical treatment, psychology had the potential to become a quantified science. Theorists such as Immanuel Kant had long stated that this was impossible, and that therefore, a science of psychology was also impossible.
Jean-Martin Charcot
Jean-Martin Charcot (; 29 November 1825 – 16 August 1893) was a French neurologist and professor of anatomical pathology. He is best known today for his work on hypnosis and hysteria, in particular his work with his hysteria patient Louise Augustine Gleizes. Also known as "the founder of modern neurology", his name has been associated with at least 15 medical eponyms, including Charcot–Marie–Tooth disease and Charcot disease. Charcot has been referred to as "the father of French neurology and one of the world's pioneers of neurology". His work greatly influenced the developing fields of neurology and psychology; modern psychiatry owes much to the work of Charcot and his direct followers. He was the "foremost neurologist of late nineteenth-century France" and has been called "the Napoleon of the neuroses".