title: Proceedings: Humoral control of periodical changes of nervous excitability.
mesh_terms: D000161:Acoustic Stimulation; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000502:physiology*; D002022:Bufo arenarum / Q000502:physiology; D002025:Bufonidae / Q000502:physiology*; D002369:Castration; D004569:Electroencephalography; D004958:Estradiol / Q000494:pharmacology; D004967:Estrogens / Q000502:physiology*; D006605:Hibernation; D008027:Light; D009431:Neural Conduction; D009812:Odorants; D010812:Physical Stimulation; D012621:Seasons; D012726:Sexual Behavior, Animal; D009435:Synaptic Transmission
chemical_list: D004967:Estrogens; D004958:Estradiol