title: Synaptic and nonsynaptic transmission: a historical perspective.
mesh_terms: D000818:Animals; D002490:Central Nervous System / Q000502:physiology*; D004553:Electric Conductivity; D009046:Motor Neurons / Q000502:physiology; D009132:Muscles / Q000294:innervation; D009474:Neurons / Q000502:physiology; D018377:Neurotransmitter Agents / Q000502:physiology; D013569:Synapses / Q000502:physiology*; D009435:Synaptic Transmission; D005680:gamma-Aminobutyric Acid / Q000502:physiology*
chemical_list: D018377:Neurotransmitter Agents; D005680:gamma-Aminobutyric Acid