thumb to move thereafter ohmic contact is maintained between the aperture of axon 50 and the aperture of axon 51 axon 50 is blocked distally at layer 36 axon 51 is blocked proximally at layer 34 there results a restoration of normal motor control a further application of the chip disclosed herein is in improving the function of an ailing or deficient nervous system many neurological researchers have been able to trigger end organs with externally synthesized nerve impulses which are injected into the nervous system through point electrodes of various materials the chip of the present invention when combined with appropriate circuitry may be used as a multiple switchboard and injection grid for externally generated signals to trigger an end organ or inhibit an undesirable nerve transmission such as 34 phantom pain 34 it may also be used as a monitoring interface for receiving signals from distal sensors and stimulating the appropriate proximal pathways to the brain means for achieving these effects will be readily apparent to those skilled in the art for example blocking may be achieved by lowering the potential at one of the contacts for a given axon hyperpolarization to a level sufficiently far below the threshold level for an action potential in that axon such that all normal nerve impulses propagating from the region surrounding that contact will remain below the threshold alternately or in conjunction with the blocking potential externally or artifically generated impulses can be transmitted to either the motor side or the sensory side by supplying then to the appropriate contact on the other hand boosting or amplification can be achieved by raising the axon potential.