This book, now in its revised and updated third edition, provides a state of the art overview of fMRI and its use in clinical practice. Experts in the field share their knowledge and explain how to overcome diverse potential technical barriers and problems. Starting from the very basics on the origin of the BOLD signal, the book covers technical issues, anatomical landmarks, methods of statistical analysis, and special issues in various clinical fields. Comparisons are made with other brain mapping techniques and their combined use with fMRI is also discussed. Existing chapters have been updated and new chapters have been added in order to account for new applications, further clinical fields and methods, e.g. resting state fMRI.