[Jean-martin charcot].

: Charcot created a system for the classification and diagnosis of neurological patients in the 1850s. His methodology consisted of listening to a patient's family history and present history, observing the patient scrupulously, and confirming lesions by autopsy once the patient was dead. He compared two different diseases in order to make their differences clear. Once he understood the fundamental form of a disease, he proceeded to study less perfect forms that had a single symptom. By this process, Charcot developed many new symptomatologies in Neurology.