Deep Brain Stimulation (DBS): Electrode Placement
Strip recording of electrical interference

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As the surgeon threads the electrode into place, watch this Essential Tremor patient's hand tremor almost stop when the electrode reaches target. This is called a "thalamotomy effect". Also notice that the patient is awake and fairly comfortable during the procedure. With the electrode in place testing is done with different stimulation settings. The patient now has good tremor control with the current stimulation settings.
To see a movie testing a Parkinson's Disease patient while placing the electrode, go to Electrode Placement-4Electric Strip Recording