title: Section I. The cholinergic system.
authors.forename: John
authors.initials: J
authors.lastname: Smythies
mesh_terms: D000818:Animals; D001921:Brain / Q000502:physiology*; D002799:Cholinergic Fibers / Q000502:physiology*; D006801:Humans; D009434:Neural Pathways / Q000033:anatomy & histology / Q000502:physiology; D009473:Neuronal Plasticity / Q000502:physiology; D011976:Receptors, Muscarinic / Q000502:physiology*; D011978:Receptors, Nicotinic / Q000502:physiology*
chemical_list: D011976:Receptors, Muscarinic; D011978:Receptors, Nicotinic