title: Diffusion in brain extracellular space.
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology / Q000502:physiology*; D001923:Brain Chemistry / Q000502:physiology; D004058:Diffusion; D005110:Extracellular Space / Q000737:chemistry / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D009457:Neuroglia / Q000502:physiology; D009474:Neurons / Q000502:physiology; D000644:Quaternary Ammonium Compounds; D011877:Radionuclide Imaging
chemical_list: D000644:Quaternary Ammonium Compounds; C027917:tetramethylammonium