Deep brain stimulation
The internal globus pallidus is the target of deep brain stimulation (DBS) for these diseases. Deep brain stimulation sends regulated electrical pulses to the target. In patients with tardive dyskinesia treated with DBS, most people reported more than a 50% improvement in symptoms. Tourette syndrome patients have also benefited from this treatment, showing over 50% improvement in tic severity (compulsive disabling motor tics are symptoms of Tourette patients). The GPi is also considered a "highly effective target for neuromodulation" when using deep brain stimulation on Parkinson's disease patients.