Stereoelectroencephalography

Stereoelectroencephalography (SEEG) is a medical procedure used to identify areas of the brain where epileptic seizures originate. This invasive procedure involves drilling small holes into the skull to insert electrodes, which record electrical activity from deep within the brain.

Procedure

The SEEG procedure begins with a detailed preoperative evaluation, including magnetic resonance imaging (MRI), computed tomography (CT) scans, and positron emission tomography (PET) scans. These imaging studies help to guide the placement of the electrodes.

During the procedure, the patient is under general anesthesia. The surgeon uses a stereotactic frame, a device used to precisely target areas within the brain, to guide the placement of the electrodes. The electrodes are then connected to a recording device, which monitors the brain's electrical activity for a period of one to two weeks.

Uses

SEEG is primarily used in patients with epilepsy who have not responded to medication and are being considered for epilepsy surgery. The goal of the procedure is to identify the exact location of the seizure onset zone, the area of the brain where seizures begin. This information is crucial in planning surgical treatment for epilepsy.

Risks and Complications

As with any surgical procedure, SEEG carries some risks. These include infection, bleeding, and damage to brain tissue. However, the risk of serious complications is relatively low.

See Also

• Epilepsy
• Neurosurgery
• Electroencephalography