Change in spike initiation stie in Helix pacemaker neurones.
D000200:Action Potentials; D000818:Animals; D001369:Axons / Q000502:physiology; D004558:Electric Stimulation; D006372:Helix, Snails / Q000502:physiology*; D008564:Membrane Potentials; D009474:Neurons / Q000502:physiology*; D012908:Snails / Q000502:physiology*