Seizure types

In the field of neurology, seizure types refer to clinically and electrographically defined categories of seizures, based on observable features, underlying mechanisms, and diagnostic findings. A seizure is a paroxysmal episode of altered behavior, sensation, awareness, or autonomic function resulting from abnormal, excessive, or synchronous neuronal activity in the brain.

Seizure classification plays a central role in the diagnosis and treatment of epilepsy and related disorders. It guides therapeutic decisions, informs prognosis, and supports communication among clinicians, researchers, and patients. The International League Against Epilepsy (ILAE) is the primary body responsible for defining seizure classifications. Its frameworks have evolved to reflect advances in neuroimaging, electrophysiology, and clinical semiology. The most recent system, published in 2025, introduces refined seizure categories aimed at improving diagnostic accuracy and clinical utility.

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