BIOMETRIC SENSOR

An access control unit having a novel structure and arrangement, including a first layer comprising an electrostimulation contact interface, a second layer including a biometric sensor coupled to the electrostimulation contact interface, and a third layer including a microprocessor unit in communication with the electrostimulation contact interface. The second layer is sandwiched between the first layer and the third layer. The electrostimulation contact interface comprises one or more anode/cathode arrays configured to deliver neurostimulative excitations to the electrostimulation contact interface to elicit behavior modification.