title: Optical measurement of membrane potential.
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology; D004396:Coloring Agents; D066298:In Vitro Techniques; D007202:Indicators and Reagents; D008564:Membrane Potentials / Q000187:drug effects; D009132:Muscles / Q000502:physiology; D009474:Neurons / Q000502:physiology; D013347:Subcellular Fractions / Q000502:physiology; D013997:Time Factors
chemical_list: D004396:Coloring Agents; D007202:Indicators and Reagents