The work of neurologist Robert S. Fisher includes the operational definition and classification of epilepsy. He led the international task force responsible for the 2014 practical clinical definition. [ref]
A practical clinical definition of epilepsy by Robert S. Fisher and others. 2014, ILAE official report, byline and Summary
The contribution distinguishes an enduring predisposition to seizures from a count of isolated observed events. The report set out circumstances in which recurrence risk or a recognized epilepsy syndrome can support a diagnosis after fewer than two unprovoked seizures. Defining such criteria makes clinical classification reproducible while exposing its assumptions; the diagnostic category is not itself a complete explanation of the underlying neural mechanism.
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