The first 2 editions of this book established it as a standard textbook for physiotherapy and manual therapy students. Originally co-authored by Bogduk and Twomey there is now a single author - Nikolai Bogduk. An understanding of the clinical anatomy of the lumbar spine and sacral area is now acknowledged as being an essential foundation for all practitioners working in the field of back pain management. This book aims to provide that foundation on which an understanding of the various treatment and therapy techniques of the different specialties involved can be built. In one volume it provides all of the elements of anatomy and biomechanics which are clinically relevant to the study of lumbar spinal pain. It has been designed for use by physiotherapists, medical practitioners and other therapists and practitioners involved in the management of back pain. Features: * Completely rewritten and revised to take account of the recent research developments in anatomy, biochemistry, anaesthesiology and radiology * Extended in scope to cover sacrum and sacro-iliac joint as well as the lumbar spine * New chapter on low back pain * 3 Completely new chapters on The Sacrum, The Sacroiliac Joint, and Instability * The author is internationally known and respected * Makes the link between the pure anatomy and the clinical problems encountered by practitioners