title: Diffusion from an iontophoretic point source in the brain: role of tortuosity and volume fraction.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D002525:Cerebellar Cortex / Q000378:metabolism; D004058:Diffusion; D005110:Extracellular Space / Q000378:metabolism; D007478:Iontophoresis / Q000379:methods*; D011188:Potassium / Q000008:administration & dosage / Q000378:metabolism; D051381:Rats; D013757:Tetraethylammonium Compounds / Q000008:administration & dosage / Q000378:metabolism
chemical_list: D013757:Tetraethylammonium Compounds; D011188:Potassium