Epilepsy has a fascinating history. To the medical historian Oswei Temkin it was 'the paradigm of the suffering of both body and soul in disease'. It is justifiably considered a window on brain function. And yet its story is more than simply a medical narrative, but one influenced also by scientific, societal and personal themes. Written for a medical and non-medical readership, this book describes the major developments in epilepsy between 1860-2020, a turbulent era in which science dominated as an explanatory model, medical theories and practices steered an erratic course, and societal attitudes and approaches to epilepsy fluctuated dramatically. In the middle of this maelstrom was the person with epilepsy at the mercy of social attitudes and legislation, and at times harmed as well as helped by medicine and science. So entangled is the history that intriguingly, as an entity, epilepsy may now be thought not even to exist.

It was only in 1980 that the first recognisable magnetic resonance images of the human brain were published, by Moore and Holland from Nottingham University in England. There then followed a number of clinical trials of brain imaging, the most notable from the Hammersmith Hospital in London using a system designed by EMI, the original manufacturers of the first CT machines. A true revolution in medicine has ensued; in only a few years there are thousands of scanning units, and magnetic resonance imaging (MRI) has assumed a central importance in medical investigation. It is an extraordinary fact that within a few years of development, the esoteric physics of nuclear spin, angular momentum, and magnetic vector precession were harnessed to provide exquisite images of living anatomy; modem science has no greater tribute. That indisputable king of neurology and the oldest of recorded conditions, epilepsy, has not been untouched by the new technology; indeed, it is our view that the introduction of MRI of electroencephalography (EEG) in the late has been as important to epilepsy as was that 1930s. Now, for the first time, the structural and aetiological basis of the condition is susceptible to thorough investigation, and MRI can provide structural detail to parallel the functional detail of EEG. MRI has the same potential as had EEG over 50 years ago, to provide a new level of understanding of the basic mechanisms, the clinical features and the treatment of epilepsy.