stereoencephalography

Stereoelectroencephalography, often abbreviated as SEEG, is a neurophysiological monitoring technique used to precisely locate the origin of epileptic seizures. It involves surgically implanting deep electrodes into specific brain structures to record electrical activity over an extended period. Unlike electroencephalography (EEG) which records from the scalp, SEEG provides intracranial recordings, allowing for a more detailed and accurate mapping of seizure foci. The electrodes, which are thin wires, are guided by advanced imaging techniques such as MRI and CT scans to reach target areas.

The recorded data from SEEG is analyzed to identify patterns of abnormal electrical discharges that characterize epilepsy. This information is crucial for neurosurgeons when planning resective surgery to remove the part of the brain responsible for seizures. The depth and placement of the electrodes allow for the investigation of complex neural networks involved in seizure generation and propagation, which might not be detectable with less invasive methods. SEEG is typically reserved for patients with complex or refractory epilepsy whose seizure origin cannot be clearly identified by other diagnostic tools. The procedure carries risks associated with any invasive surgery, including infection and bleeding.