title: A simple, inexpensive circuit to add current balance to microiontophoresis apparatus.
mesh_terms: D000818:Animals; D005071:Evoked Potentials; D007478:Iontophoresis / Q000295:instrumentation*; D009046:Motor Neurons / Q000502:physiology; D009482:Neurophysiology / Q000295:instrumentation*; D051381:Rats; D012666:Semiconductors; D013126:Spinal Nerve Roots / Q000502:physiology