Epilepsy means recurrent unprovoked seizures: brief episodes of abnormal function caused by excessive synchronous discharge of groups of brain neurons. A seizure is the event; epilepsy is the enduring predisposition to have more of them. A single seizure provoked by a transient trigger such as fever, intoxication, or a severe metabolic disturbance is not epilepsy once the trigger is gone.
Epilepsy is learned by following a patient’s path: name the kind of seizure, understand why neurons produce it, decide whether an event was a seizure at all, choose treatment, and plan for outcomes and emergencies. Two topics on mimics sit alongside this path for whenever the story does not quite fit.
Choose a route through the topic
- Epilepsy Classification gives the shared vocabulary: focal (one hemisphere) versus generalized onset, awareness and motor features, the main generalized types, and the six etiological categories, meaning the groups of causes.
- Epilepsy Pathophysiology explains the two mechanisms behind every seizure, membrane depolarization (a neuron firing when it should not) and hypersynchrony (many neurons firing together), and why seizure threshold, the amount of provocation needed to trigger a seizure, sits on a continuum.
- Epilepsy Diagnosis and EEG covers the history-led workup, the electroencephalogram (EEG, a scalp recording of cortical electrical activity) protocol with activation procedures and characteristic findings, and why MRI is the outpatient imaging choice.
- Epilepsy Treatment covers when a first seizure warrants treatment, drug selection by seizure type, and how therapy is monitored, switched, and stopped.
- Epilepsy Prognosis, Surgery, and Driving answers the endpoint questions: expected courses and drug resistance, surgery referral and yield, and driving rules with safety counselling.
- Status Epilepticus covers the emergency that will not stop on its own: the 5-minute definition, convulsive versus non-convulsive forms, and phased treatment with resuscitation first.
- Seizure versus Syncope compares the most common mimic: cortical hypersynchrony against cerebral hypoperfusion (too little blood flow to the brain), with the bedside clues and the overlap trap.
- Epileptic Seizure versus Non-Epileptic Events widens the differential to syncope, psychogenic, metabolic, sleep, and movement mimics, with the patterns that separate them and the cost of mislabelling either way.
Start with classification for the vocabulary, then mechanism and diagnosis, then treatment and its endpoints, keeping the emergency and the two mimic notes at hand for the cases that do not fit.