As soldiers and combat veterans have returned from the wars in Iraq and Afghanistan traumatic brain injury (TBI) has been identified as the "signature injury" of those wars. TBI is also in the news on a daily basis due to sports injuries. This new edition has been revised and updated from the 2005 first edition to reflect the exponential expansion of research and clinical data amassed in the intervening years. Each chapter was written and reviewed by the foremost authorities in neuropsychiatry, neurology, rehabilitation medicine, and the other specialties who assess, diagnose, and treat these patients. The revisions and additions to this comprehensive volume were made to ensure that the scope and coverage is both up-to-date and down-to-earth. Key features include: New chapters on epidemiology, neuropathology, and genetics of TBI; new chapter on TBI in the military emphasizing the unique feature of blast injury; A new chapter on posttraumatic stress disorder (PTSD), which emphasizes the common co-occurrence of TBI and PTSD in both combat and other settings; Enhanced coverage of psychopharmacology and psychotherapy for the psychiatric symptoms associated with TBI; Information on the social ramifications of TBI so that clinicians will better understand and help their patients cope with the complex legal, financial, and insurance-based struggles their patients who have sustained TBI encounter; Each chapter concludes with essential points and key references to focus attention and consolidate learning; A foreword written by Bob Woodruff (the ABC World News correspondent who sustained a TBI while covering the war in Iraq) and his wife, Lee Woodruff, who underscore that although this volume is intended to be read primarily by professionals, patients and families may also find the information in the textbook to be of keen interest and practical application.