Capabilities of a toroid-amplifier system for magnetic measurement of current in biological tissue.
D000818:Animals; D001369:Axons / Q000502:physiology; D001698:Biomedical Engineering; D004560:Electricity; D004594:Electrophysiology; D009132:Muscles / Q000502:physiology; D010210:Papillary Muscles / Q000502:physiology