Neurostimulation assemblies, systems, and methods make possible the providing of short-term therapy or diagnostic testing by providing electrical connections between muscles or nerves inside the body and stimulus generators or recording instruments mounted on the surface of -the skin or carried outside the body. Neurostimulation assemblies, systems, and methods may include a carrier and a removable electronics pod, the electronics pod including stimulation generation circuitry, a power input bay to hold a disposable power source, and user interface components. The assemblies, systems, and methods are adapted to provide coordinated neurostimulation to multiple regions of the body.