APPARATUS AND SYSTEM FOR STIMULATING AND / OR RECORDING SIGNALS TRAVELLING ALONG NERVE FIBERS

The present disclosure relates to an apparatus, neurostimulation device, system, and computer program for stimulating and / or recording signals travelling along nerve fibers of a spinal cord. According to aspects of the present disclosure, the apparatus comprises one or more first electrode arrangements arranged on an elongated and nonconducting base material, each first electrode arrangement comprising: an elongated first central reference electrode extending along a longitudinal direction of the elongated base material; and a plurality of first electrodes arranged on both sides of the elongated first central reference electrode; wherein a length of the elongated first central reference electrode is at least two times larger or at least three times larger than an average length of the plurality of first electrodes; and wherein the elongated first central reference electrode is configured to provide a counter potential for stimulating and / or a reference potential for recording of the nerve fibers of the spinal cord via the plurality of first electrodes.