By displaying the physiological counterpart to clinical disorders involving the central nervous system, EEG remains in the forefront of neurological evaluation. In addition to epilepsy, EEG may clarify clinical situations related to dementia, stroke, and some movement disorders. Moreover, through notable advances in neurological intensive care by G. Bryan Young and others, we foresee an ever-enlarging role of EEG for these critical moments of patients' lives.
This atlas is intended for everyone interested in clinical central neurophysiology, particularly young electroencephalographers, general neurologists, and pediatric neurologists, in whose practices EEG plays a significant role.
Lippincott Williams & Wilkins very appropriately requested a merger of our pediatric (1982, 1999) and adult (1995, 2002) atlases. This is a fortunate opportunity, as many normal and abnormal EEG patterns evolve gradually with age; therefore, a considerable overlap exists between these child and adult EEG disciplines. Other morphologies, such as bisynchronous spike–waves, remain consistent with age. Moreover, pediatric-like diffuse patterns may emerge in adults suffering from acute central nervous system illnesses.
The current atlas contains a substantially larger portion of digitally obtained illustrations while preserving the more informative among analog obtained ones. Sixteen channel recordings are the source of all material in this atlas. However, for greater clarity, some illustrations contain only channels relevant to the particular phenomenon(a) shown.
We present clinically relevant EEG patterns in the manner in which they appear in clinical practice—often dissimilar to “ideal” appearances. The appreciation of such phenomena requires knowledge of the following: (a) waveforms, (b) morphologies of superimposed waveforms, (c) principles of localization (i.e., polarity), and (d) artifacts. Therefore the reader is advised to review carefully the initial sections of our atlas devoted to these fundamental aspects. We recommend a thorough review of the succinct chapter on technology–essential knowledge for EEG interpretation.
We have devoted much care to the selection of these figures and particularly to the legends by which the figures can be fully appreciated. In some instances, normal features appear in chapters of abnormality for more direct comparison. Please pay special attention to the summaries in point form of electrographic features preceeding the illustrations in chapters 2 through 5.
Chapters devoted to the roles of EEG in child and adult neurology will enhance the ability of the neurologist–EEGer to relate its findings meaningfully to the clinical disorder in question.
That high quality EEG performance is requisite for accurate waveform identification is reflected in the presence of two EEG technologists as authors. Giannina M. Holloway selected, classified and appropriately displayed a great proportion of new digital features, supplementing the original contributions of Masako Kaibara.