This book is written by the former Professor of Physiology of Paris and not by Henri Roger, the distinguished Professor of Neurology of Marseille.

Legend says that Lao-tse, the Chinese philosopher, was born at the age of seventy, a fact which explained his great wisdom. Unfortunately, what may have been true for an ancient philosopher does not apply to western culture.

This text cleaves to the old atomic, not to the new dynamic psychology. Sixty-eight years ago Claude Bernard stated that no line of demarcation exists between physiology and psychology. Henri Roger still makes no distinction between the languages of psychology and physiology. The book contains nothing new in either neurology or psychology.