1. A device for measuring an electrical signal occurring in body cells of an animal, including a human animal, comprising: a picafina generally cylindrical device body with a proximal extremity, a distal extremity, an inner lumen and an outer surface; a plurality of measuring electrode tips on the outer surface of the picafina in fixed relative positions to the distal extremity; a first plurality of wires running inside the lumen wherein the first plurality of wires have wires comprising at least one element from the group: electric power wires, binary information wires, and signal carrying wires; a plurality of first on/off switches, each of the first on/off switches associated with one of the measuring electrode tips for selecting the associated measuring electrode tip; a plurality of second on/off switches, each of the second on/off switches associated with one of the signal carrying wires running inside the lumen; a device connector at the proximal extremity of the picafina to connect the first plurality of wires in the lumen to additional wires outside the picafina device body, the additional wires outside the picafina for connecting to at least one element of the group: a measuring and/or recording instrument, an electric energy storage, a control electronics; wherein the measuring electrode tips are configured to measure the electrical signal values at the body cells next to the respective electrode tips.