Abstract
Neuromodulation (deep brain stimulation; DBS) has become an established treatment for movement disorders (e.g., Parkinson's disease), and is in trials for refractory epilepsy, headache, and certain mood disorders. Two main themes will advance DBS significantly in the next five years: closed-loop DBS, that is, feedback from brain electrical activity to direct the stimulation; and computational analysis (CA)--electrophysiological modeling to enhance DBS. Closed-loop DBS is currently in clinical trials for refractory epilepsy. New imaging techniques offer preoperative modeling for DBS surgery, including nerve fiber tracts (diffusion tensor imaging), and imaging of volume of tissue activated by a specific electrode. CA techniques for DBS include mathematical models of the abnormally synchronized electrical activity which underlies epilepsy, movement disorders, and likely many mood disorders as well. By incorporating feedback loops and multiple recording and/or stimulating sites, the abnormally synchronized brain electrical activity can be desynchronized, then "unlearned" ("unkindling" in epilepsy). Characteristics of DBS utilizing CA include low frequency rather than high frequency stimulation; multiple stimulation and/or recording...Continue Reading
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