ictal
Pronunciation: IK-tal
Relating to or occurring during an actual seizure episode.
Full Definition
Ictal refers to the period during which an actual seizure is occurring, encompassing all electrical and clinical manifestations of the seizure event itself. Ictal EEG recordings capture the real-time electrical activity during seizures, showing characteristic patterns that help determine seizure type, localize the seizure focus, and guide treatment decisions. Ictal phenomena include both the electrical changes visible on neurophysiological monitoring and the observable clinical symptoms experienced by the patient, such as motor movements, altered consciousness, or sensory disturbances. Documentation of ictal events requires precise timing and detailed description of both electrographic and clinical features for accurate diagnosis and treatment planning.
Usage
Usage note: Use consistently with interictal and postictal to describe seizure phases; avoid confusion with 'ictus' (stroke).
In Context
- "Ictal EEG changes showed rhythmic spike activity originating from the left frontal region." — Seizure monitoring report
- "The patient's ictal semiology included focal motor symptoms with preserved awareness." — Epilepsy classification documentation