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

Iori Ito, Tetsuya Kimura, Etsuro Ito

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

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
Volume304
Issue number3
DOIs
Publication statusPublished - 2001 May 25
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Neuroscience(all)

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