Washington: Two studies by University of Alabama at Birmingham researchers have suggested that deep-brain stimulation (DBS) may stop uncontrollable shaking in patients with Parkinson’s disease and essential tremor by imposing its own rhythm on the brain. DBS uses an electrode implanted beneath the skin to deliver electrical pulses into the brain more than 100 times per second. Although this technology was approved by the Food and Drug Administration more than 15 years ago, it remains unclear how it reduces tremor and other symptoms of movement disorders.With the help of electroencephalography or EEG — electrodes placed on the scalp — study authors used new techniques to suppress the electrical signal associated with the DBS electrode. That enabled the first clear, non-invasive EEG measurements of the underlying brain response during clinically effective, high-frequency brain stimulation in humans.
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