Deep brain stimulation treats intention tremors but does not help related diseases or disorders such as dyssynergia and dysmetria. Deep brain stimulation involves the implantation of a device called a neurostimulator, sometimes called a 'brain pacemaker'. It sends electrical impulses to specific parts of the brain, changing brain activity in a controlled manner. In the case of an intention tremor, the thalamic nuclei is the region targeted for treatment. This form of treatment causes reversible changes and does not cause any permanent lesions. Since it is reversible, deep brain stimulation is considered fairly safe: Reduction in tremor amplitude is almost guaranteed and sometimes resolved. Some individuals with multiple sclerosis have seen sustained benefits in MS progress.