Picture showing size of nerve activation currents:
Below is a section of an electrical diagram from a neurobiology textbook. You don't need to be a scientist to understand the point of this diagram. Those electrical current scales on the left of each curve show current in NANOamperes. One NANOampere is one BILLIONTH of one ampere.
Radio signals can induce such currents without much trouble. This shows what the covert weapons developers have done: Just subsitute radio signals for directly connected wires. We all know what a wide and amazing range of effects can be caused when wires are connected to our nervous systems.
Considering the tiny currents helps the reader to see that the TORTURE effects we victims experience are not really that hard to generate from even long distances, when the signals are tightly focussed by dish antennas or masers.