Patent ID: 8670837

Claim:
A device for electrical stimulation of animal tissues, comprising an electrical energy storage unit and controlling electronics housed in an hermetically enclosure at a first location, and an electrode at a second location which is capable of dispersing electric current in its surrounding tissues, wherein the second location comprising the electrode is located at the distal extremity of a plurality of wires connected at their proximal extremity to the electrical energy storage unit and controlling electronics at the first location; the device further comprising: a. a screw-shaped structure at the distal extremity of the wire which is capable of being screwed into animal tissues to apply an electrical stimulation signal, b. the screw-shaped structure having a proximal extremity and a distal extremity, an inner lumen and a surface enclosing the inner lumen, c. the surface of the screw-shaped structure having a plurality of electrodes which are capable of being connected by wires passing from the inner lumen to the proximal extremity of the screw-shaped structure, then to the wires connecting to the electrical energy storage unit and controlling electronics at the first location, the electrodes being distributed over the surface of the screw-shaped structure in such a way that the electrodes are at several angular positions and several distances from the distal extremity on the surface of the screw-shaped structure, d. in which the screw-shaped structure is shaped as a generally conical shape with the apex at the distal extremity, on the surface of which there are threads of progressively larger radius and on the surface of which the electrodes are located, e. the screw-shaped structure being capable of being screwed into the animal tissue which is intended to receive the electrical stimulation, such that progressive turning of the wire connecting the screw-shaped structure to the electrical energy storage unit and controlling electronics at the first location causes that the screw-shaped structure to encase itself deeper inside the surrounding tissue, thereby allowing deeper cells in the target location to receive electrical stimulation.