The present disclosure provides a modular neurostimulator system. The system includes a stage one implant that can be externally powered and controlled. The stage one implant is made of one or more leads as well as a passive receiver and an external controlling and powering device. The receiver and the external device can be utilized either as a long-term trial system, or as a permanent system (depending on the patients wishes, reimbursement, payor policy, etc). Since the receiver and the external device can have limited costs and features, they are a good vehicle for a long-term trial without risk of infection and excessive upfront cost. The length of the trial assures extreme accuracy in the evaluation of the efficacy of the modality. The system may also include a stage two implant that includes an implantable power supply and/or control elements connectable to one or more previously implanted stage one implants.
