To me it seems everyone is fixed sated on the brain but all we need to doo is look for the basic then work from there. I am a electrician by trade and we all the body is gust another electrical device. I propose that every won consider my ideas. If we look at this electrically and not the biology side of it. An electrical system has some basic parts that we need to look at.
First is the voltage applied to the nerves
Second is the amperes moving through the nerves
Third is the frequency of the voltage
Since the body is an AC (alternating current) circuit so if we in theory hook up an oscilloscope and recorded the frequency changes as well as the changes in the ampacity. Then we could start to decode it once it has been decoded we could replicate and or block it using a magnetic field applied to the back of the neck.