The research about placing the stimulator in the lower spine rather than in the brain. It is supposed to be less expensive and easier surgery. It is based on the premise that Parkinsonism is a nerve disorder rather than a brain disorder. Somehow a poison enters the nervous system via the lungs or digestive tract and makes its way to the nerves via the blood. Then travels up the spine, destroying or blocking the pathways through which the neurons travel from the brain down to the spinal chord. I do not think they are experimenting on people yet, only rats, which I had the time to try it.