title: A three-channel swivel for electrical brain stimulation in unrestrained rodents.
abstract: The construction of an inexpensive, three-channel commutator is described. The unit maintains uninterrupted contact with unrestrained rodents. Rotation requires the application of very little torque because tension is low and because the rotor, weighing about 2.5 g, has negligible inertia.
mesh_terms: D000818:Animals; D001921:Brain / Q000502:physiology*; D004558:Electric Stimulation / Q000295:instrumentation*; D009482:Neurophysiology / Q000295:instrumentation*; D012377:Rodentia