History of the International Neuropsychological Symposium: a reflection of the evolution of a discipline.

The International Neuropsychological Symposium is the name of a group which, since 1951, meets every year for the purpose of promoting knowledge and understanding of brain functions and cognate issues on the borderland of neurology, psychology and psychiatry. This paper summarizes the history of the International Neuropsychological Symposium and is intended as a tribute to Henry Hécaen, co-founder and major advocate of the group throughout his entire scientific life. It is felt that the evolution of the Symposium may be considered a reflection of the evolution of the discipline of Neuropsychology and may help to understand the evolution of the field in the past fifty years.