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Brain & Nervous System Health Center

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Surgery: Can this be a cure for Epilepsy?

By Patricia E. McGoldrick, NP, MPA
WebMD Feature from “Exceptional Parent” Magazine

In the previous two articles, we have discussed patients with intractable epilepsy who have benefited from epilepsy surgery to remove or disconnect the area of the brain that propagates their seizures. Another group of people who may benefit from epilepsy surgery is those who have generalized seizures - seizures where there is no clear onset in the brain. These children may also have severe developmental delays, worsened by years of seizures. These children are the ones who can benefit from corpus callosotomies or vagal nerve stimulators. In patients who suffer from disabling drop attacks (atonic seizures) where the onset of the seizure activity cannot be localized to one area or one hemisphere, another surgical procedure may be used to prevent the spread of the seizure activity. The corpus callosum is divided in a one-stage operation. While seizure freedom is not as common with this form of surgery, as with focal epilepsy surgery, there are several advantages.

At the American Epilepsy Society Meeting in 2008, we presented a series of 22 children who underwent this procedure over the last four years, and showed that all patients have had a significant reduction in seizure frequency, severity, and the ability to decrease seizure medications and their side effects with very minimal morbidity. Moreover, several of these patients have gone on to have more clearly defined epilepsy: what was thought to be generalized epilepsy became clearly focal once the rapid spread from one hemisphere to another across the corpus callosum was interrupted. These children then returned for staged epilepsy surgery, where grids and strips were used to define their epileptogenic zones, and the seizure focus was removed with better seizure control, improvement in cognitive and motor skills, and a brighter future.

Neurostimulation is being used with varying results. Techniques include vagus nerve stimulation. Vagus nerve stimulation is used for cases where a focal lesion or focal epilepsy cannot be established. In this procedure, the stimulator (or pacemaker) is placed in the chest through a small incision near the armpit. A second incision is made in the neck to wrap a wire around the vagus nerve. The entire unit is then periodically programmed to send electrical currents that can minimize the severity and frequency of seizures. A special magnet can be used to send additional electricity to stop seizures when they occur.

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