In this edition the few changes that have been made are for the purpose of making descriptions simpler and clearer. There are a few monographs in every field that become classics; this small publication is one of them. Although the author describes the book as an introduction and although it is relatively short, each of the chapters is an individual essay. The chapters on the motor system, on muscle tone and coordination of movement, and on the visual system have never been surpassed. This volume is one that can be fully appreciated only by those who have spent some years in this field. The more experienced in clinical neurology the reader is the more he will appreciate this monograph.