What does "ictal EEG" refer to in relation to an event?

"Ictal EEG" refers to the brainwave activity that occurs during a seizure or seizure-like event. The term "ictal" itself is derived from the Latin word "ictus," meaning "attack" or "stroke," which is used in neurology to denote an episode in which a seizure takes place. Therefore, when we talk about ictal EEG, we are specifically focusing on the electrical activity happening at the time of the seizure.

During an ictal event, the EEG will show patterns that are distinct from those observed in the interictal (between seizures) or postictal (after a seizure) periods. Analyzing the ictal EEG can provide crucial information about seizure type, duration, and other characteristics that are essential for diagnosing and managing seizure disorders.