Odor responses and spontaneous oscillatory activity in tentacular nerves of the terrestrial slug, Limax marginatus

Iori Ito, Tetsuya Kimura, Etsuro Ito

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We studied the neural oscillatory activity in the peripheral olfactory system of the tentacles in the terrestrial slug, Limax marginatus, by extracellular recording. Recordings from the cut-ends of the inferior tentacular nerves connected to the inferior tentacular ganglia and sensory epithelia showed spontaneous oscillatory activity at frequencies of 0.1-30 Hz. This spontaneous activity was dominated by the 0.6-6 Hz band. Ethanol odor stimulation decreased the amplitude in the 0.6-6 Hz band and increased those in the 6-15 and 15-30 Hz bands. Antagonists of the γ-aminobutyric acid (GABA) receptor, bicuculline and picrotoxin, resulted in suppression of spontaneous activity and modulated the odor response in the 0.6-6 Hz band. Our results indicate the involvement of GABA-mediated oscillatory activity in the tentacular nerves in the olfactory processing in molluscs.

Original languageEnglish
Pages (from-to)145-148
Number of pages4
JournalNeuroscience Letters
Issue number3
Publication statusPublished - 2001 May 25



  • Bicuculline
  • Invertebrate olfaction
  • Local field potential
  • Neural oscillation
  • Picrotoxin
  • γ-amino butyric acid

ASJC Scopus subject areas

  • Neuroscience(all)

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