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Brain stimulation for epilepsy
William H Theodore1, Robert S Fisher
1Clinical Epilepsy Section, National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. theodorw@ninds.nih.gov
The Lancet. Neurology
|January 30, 2004
Summary
Neural stimulation, including vagus-nerve stimulation (VNS), offers a promising treatment for intractable seizures, showing effectiveness comparable to drugs with rare complications. Further research explores deep brain stimulation and adaptive EEG-contingent stimulation for epilepsy.
Area of Science:
- Neuroscience
- Neurology
- Biomedical Engineering
Background:
- Neural stimulation is an emerging therapeutic modality for medically-intractable seizures.
- Vagus-nerve stimulation (VNS) is an approved adjunctive therapy demonstrating efficacy similar to antiepileptic drugs with a low risk of serious complications.
- Other techniques like transcranial magnetic stimulation (TMS) and deep brain stimulation (DBS) are under investigation, with preliminary results for DBS being encouraging but not yet conclusive.
Purpose of the Study:
- To review the current landscape and future directions of neural stimulation techniques for epilepsy treatment.
- To assess the efficacy and safety profiles of various neural stimulation modalities.
- To highlight ongoing research and potential advancements in seizure management.
Main Methods:
- Review of existing literature on neural stimulation for epilepsy.
- Analysis of clinical trial data and preliminary findings for VNS, TMS, and DBS.
- Discussion of risks associated with invasive procedures like electrode implantation.
Main Results:
- Vagus-nerve stimulation (VNS) is effective and safe as an adjunctive therapy for epilepsy.
- Transcranial magnetic stimulation (TMS) has shown equivocal results in limited studies.
- Deep brain stimulation (DBS) applied to various brain regions shows encouraging preliminary outcomes, though further controlled studies are needed.
- Risks of intracranial hemorrhage and infection are associated with electrode implantation.
Conclusions:
- Neural stimulation, particularly VNS, represents a viable treatment option for intractable epilepsy.
- Ongoing research into DBS and adaptive stimulation holds promise for future epilepsy management.
- Careful consideration of risks versus benefits is crucial for invasive stimulation techniques.