Subgenual Cingulate Deep Brain STIMulation for Apathetic Behavioral Variant FRONtotemporal Dementia

Deep Brain Stimulation (DBS) is a neurosurgical procedure involving the implantation of deep brain electrodes, connected via a subcutaneous extension wire, to an implantable pulse generator (IPG, or 'battery') that is implanted below the collarbone. All patients will receive deep brain stimulation (DBS) targeting the subgenual cingulate (SGC) bilaterally. No other changes to pre-existing treatment will be made. This is the only arm in this experiment.