This edition presents invasive depth EEG techniques, in four rather that two chapters. The section on evoked potentials has been enlarged with the addition of chapters on neurometric analysis and P300 response. The section on computerized EEG analysis has grown to four chapters and includes not only the principles but the clinical use of EEG topography. A new chapter presenting the principles of computerized epilepsy monitoring also includes the foundations of digitized (paperless) EEG recording. A special MEG chapter addresses the importance of magnetoencephalography at both the fundamental and clinical level.