A tissue stimulation system (100, 101, 102, 103, 150) comprising an implantable end (100, 101, 102, 103) and a stimulation energy source, the implantable end (100, 101, 102, 103) comprising: - an elongated substrate (300, 350), disposed along a longitudinal axis, the substrate having a first and second surface disposed along substantially parallel transverse planes (600, 700); - one or more stimulation electrodes (200, 220), comprised in the second surface and configured to transmit energy, in use, to human or animal tissue; and - one or more proximal return electrodes (400, 401, 402, 403), comprised in the first surface or second surface, disposed proximate the one or more stimulation electrodes (200, 220); the stimulation energy source comprising: - one or more distal return electrodes, disposed distantly from the one or more stimulation electrodes (200, 220); and - a pulse energy controller; the tissue stimulation system (100, 101, 102, 103, 150) further comprising: - one or more interconnections between the implantable end (100, 101, 102, 103) and a stimulation energy source, configured and arranged to connect the output of the pulse generator to the one or more stimulation electrodes whereby electrical energy may be transferred, during use, as one or more electrical stimulation pulses to the one or more stimulation electrodes (200, 220) with respect to an electrical return (400, 450); wherein: - the one or more proximal return electrodes (400, 401, 402, 403) are configured as a first part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); and - the one or more distal return electrodes are configured as a second part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); the pulse energy controller further comprising a ratio controller, configured and arranged to modify the electrical potential and/or current ratio of the first part to the second part. - an elongated substrate (300, 350), disposed along a longitudinal axis, the substrate having a first and second surface disposed along substantially parallel transverse planes (600, 700); - one or more stimulation electrodes (200, 220), comprised in the second surface and configured to transmit energy, in use, to human or animal tissue; and - one or more proximal return electrodes (400, 401, 402, 403), comprised in the first surface or second surface, disposed proximate the one or more stimulation electrodes (200, 220); the stimulation energy source comprising: - one or more distal return electrodes, disposed distantly from the one or more stimulation electrodes (200, 220); and - a pulse energy controller; - one or more distal return electrodes, disposed distantly from the one or more stimulation electrodes (200, 220); and - a pulse energy controller; the tissue stimulation system (100, 101, 102, 103, 150) further comprising: - one or more interconnections between the implantable end (100, 101, 102, 103) and a stimulation energy source, configured and arranged to connect the output of the pulse generator to the one or more stimulation electrodes whereby electrical energy may be transferred, during use, as one or more electrical stimulation pulses to the one or more stimulation electrodes (200, 220) with respect to an electrical return (400, 450); - one or more interconnections between the implantable end (100, 101, 102, 103) and a stimulation energy source, configured and arranged to connect the output of the pulse generator to the one or more stimulation electrodes whereby electrical energy may be transferred, during use, as one or more electrical stimulation pulses to the one or more stimulation electrodes (200, 220) with respect to an electrical return (400, 450); wherein: - the one or more proximal return electrodes (400, 401, 402, 403) are configured as a first part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); and - the one or more distal return electrodes are configured as a second part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); - the one or more proximal return electrodes (400, 401, 402, 403) are configured as a first part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); and - the one or more distal return electrodes are configured as a second part of the electrical return (400, 450) for the one or more stimulation electrodes (200, 220); the pulse energy controller further comprising a ratio controller, configured and arranged to modify the electrical potential and/or current ratio of the first part to the second part.