This book is a guide that embraces the essentials necessary to the understanding of the sympathetic nervous system, with emphasis on surgery. It outlines anatomic relationships, surgical techniques, and certain disorders related to sympathetic function. The text is supplemented by simplified drawings. Surgical procedures are briefly outlined. This book is a condensed and simplified manual. It is not a reference work or a source for specific information relative to detail of anatomy, surgical techniques, or clinical problems related to the sympathetic nervous system.