UC San Francisco scientists have discovered a possible mechanism for how deep-brain stimulation (DBS), a widely used treatment for movement disorders, exerts its therapeutic effects. Few medical treatments show results as rapid and dramatic as those seen with DBS, in which surgically implanted devices deliver electrical pulses to inner brain structures involved in movement. In most Parkinson's disease (PD) patients who receive the treatment, symptoms of slow movement, tremor, and rigidity sharply diminish soon after the stimulation device is activated, and quickly return if the device is turned off. But surprisingly, there has been very little understanding of precisely why and how DBS works so well--a lack of knowledge that has held back efforts to further improve the therapy. Despite the great success of DBS, some significant problems remain. Customizing the stimulation delivered by DBS devices for each patient to maximally reduce symptoms is challenging and time-consuming. And a minority of patients never obtains the full benefit their physicians expect. With a better understanding of how DBS acts on brain circuits, researchers hope to address these shortcomings and make DBS an even more effective treatment. The new research, published online April 13, 2015 in Nature Neuroscience, reveals that DBS keeps … Continue reading
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