Erfan Bashar
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Epilepsy

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Educational scope notice: This is a study note for medical students, not medical advice, diagnosis, or treatment guidance. Clinical management should follow local protocols and current guidelines.

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.

The notes below move from vocabulary to mechanism, then workup and treatment decisions, then longer-term outcomes and the emergency, with two notes on mimics to use whenever the story does not quite fit.

Choose a route through the topic

  • Epilepsy Classification gives the shared vocabulary: focal versus generalized onset, awareness and motor features, the main generalized types, and the six etiological categories.
  • Epilepsy Pathophysiology explains the two mechanisms behind every seizure, membrane depolarization and hypersynchrony, and why seizure threshold sits on a continuum.
  • Epilepsy Diagnosis and EEG covers the history-led workup, the EEG 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, 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.

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