Ictal EEG
EEG recording captured during an actual seizure event, showing characteristic electrical patterns.
Full Definition
Ictal EEG refers to electroencephalographic recordings obtained during the actual occurrence of a seizure, capturing the electrical brain activity that corresponds to the clinical event. These recordings are crucial for seizure localization, classification, and distinguishing epileptic seizures from non-epileptic events. Ictal patterns vary by seizure type and location but typically show rhythmic activity, spike-and-wave complexes, or other distinctive patterns. Obtaining ictal EEG often requires prolonged monitoring in an epilepsy monitoring unit, as seizures must occur during the recording period.
Usage
Usage note: Always distinguish temporal relationship to seizure; specify if recording captures seizure onset or propagation.
In Context
- "The ictal EEG demonstrated rhythmic theta activity over the right temporal region corresponding to the patient's complex partial seizure." — EEG interpretation report
- "Capturing ictal EEG was essential for confirming the epileptic nature of the patient's spells." — EMU discharge summary