• Mojgan Hodaie, Richard A Wennberg, Jonathan O Dostrovsky, and Andres M Lozano.
• Division of Neurosurgery, University of Toronto, ON, Canada.
• Epilepsia. 2002 Jun 1; 43 (6): 603-8.

PurposeA significant number of patients with epilepsy remain poorly controlled despite antiepileptic medication (AED) treatment and are not eligible for resective surgery. Novel therapeutic methods are required to decrease seizure burden in this population. Several observations have indicated that the anterior thalamic region plays an important role in the maintenance and propagation of seizures. We investigated neuromodulation of the anterior thalamus by using deep-brain stimulation (DBS) in patients with intractable seizures.MethodsFive patients with medically refractory epilepsy underwent stereotactic placement of and received stimulation through bilateral DBS electrodes in the anterior thalamus.ResultsTreatment showed a statistically significant decrease in seizure frequency, with a mean reduction of 54% (mean follow-up, 15 months). Two of the patients had a seizure reduction of > or =75%. No adverse effects were observed after DBS electrode insertion or stimulation. Unexpectedly, the observed benefits did not differ between stimulation-on and stimulation-off periods.ConclusionsDBS of the anterior thalamus is a safe procedure and possibly effective in patients with medically resistant seizures.

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