Invasive Studies (Phase II)

epilespy invasive monitoring

Information for Patients

Phase II video-EEG monitoring requires invasive monitoring. Types of invasive monitoring include subdural electrodes or depth electrodes and stereo EEG monitoring. Phase II monitoring is similar to Phase I monitoring except the electrodes are either placed directly on or implanted in the brain.

Subdural Electrode MonitoringIn this procedure, a very thin plastic strip of electrodes is placed on the surface of the brain through a craniotomy (opening of the brain).

Stereo EEG Monitoring (SEEG)Stereo EEG is a less invasive procedure where electrodes are strategically inserted into the brain to determine a seizure focus.