title: Noise measurements in axon membranes.
abstract: A fluctuation (noise) component, which arises from spontaneous microscopic conductance perturbations, about the mean conduction characteristics of small areas of axon membrane has been measured and appears to relate to voltage-dependent potassium-ion movements. Since the kinetics of relaxing membrane structures which produce ion permeation noise may be deduced from the form of power density spectra of fluctuations, a comparison of measured and theoretical noise spectra may lead to direct tests of conduction of models.
mesh_terms: D000818:Animals; D001369:Axons / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism*; D002463:Cell Membrane Permeability; D049832:Decapodiformes; D004594:Electrophysiology; D066298:In Vitro Techniques; D007700:Kinetics; D008433:Mathematics; D008954:Models, Biological; D009622:Noise; D011188:Potassium / Q000378:metabolism*
chemical_list: D011188:Potassium