Tuning the Brain...Deep-brain stimulation is allowing neurosurgeons to adjust the neural activity in specific brain regions to treat thousands of patients with myriad neurological disorders.

DEEP-BRAIN STIMULATION (DBS): Electrodes implanted into targeted brain regions deliver electrical stimulation to either excite or inhibit activity in a neural circuit of interest. DBS patients are also fitted with battery-powered implanted pulse generators, typically placed subcutaneously below the clavicle and connected to the electrodes via insulated wires. These pulse generators can deliver electrical stimulation from 20 to 200 times per second.




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http://www.the-scientist.com/?articles.view/articleNo/38047/title/Tuning-the-Brain/