Since 1948, it became customary to publish the proceedings of the International Congresses of Electroencephalography and Clinical Neurophysiology and later of the International Federation of Clinical Neurophysiology (IFCN) in a supplement book series to the Journal. First in soft cover, later in hard cover.
Besides the proceedings of the IFCN congresses, the series also covers International Evoked Potentials Symposia and some smaller symposia on, e.g., epilepsy, current trends in event-related and evoked potentials, recent advances in clinical neurophysiology, with special emphasis on studies of cognitive functions, etc.
Also the newer developments, such as "transcranial magnetic stimulation" and "digital EEG", are covered in the series.
In principle, the series represents in clinical neuroscience all fields of human physiology and pathophysiology of both the peripheral and the central nervous systems, from electrophysiology to integrated neuroimaging, from functional MRI to cognitive neuroscience.