On the excitability change during the rhythmic excitatory state of the single optic nerve-ending of horseshoe crab.
D000818:Animals; D001181:Arthropods; D003445:Crustacea / Q000502:physiology*; D006737:Horseshoe Crabs; D009411:Nerve Endings / Q000502:physiology*; D009900:Optic Nerve / Q000502:physiology*
CRUSTACEA/physiology; NERVE ENDINGS/physiology; OPTIC NERVE/physiology