Spike after-hyperpolarisation of a sympathetic neurone is calcium sensitive and is potentiated by theophylline.
D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D004357:Drug Synergism; D005725:Ganglia, Autonomic / Q000502:physiology*; D008564:Membrane Potentials / Q000187:drug effects*; D013806:Theophylline / Q000494:pharmacology*
D013806:Theophylline; D002118:Calcium