Evoked potential and single unit responses to olfactory nerve volleys in the isolated turtle olfactory bulb

U. Waldow, M. C. Nowycky, G. M. Shepherd

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

An in vitro preparation of the whole olfactory bulb of the turtle has been investigated using extracellular evoked potentials and unitary spikes. The compound action potential has a slow conduction velocity (0.15 mm/msec), brief relatively refractory period (10 msec) and prolonged supernormality (several hundred msec). The evoked potentials undergo prolonged periods of partial and complete suppression, as tested by the responses to paired volleys in the olfactory nerves. The suppression has a complex temporal pattern, and lasts more than 4 sec. Similar periods were revealed by the unitary spike responses of presumed mitral cells to olfactory nerve volleys. The results are similar to those reported in in vivo stuides of turtle and other species. They suggest that the basic properties of mitral cells and their synaptic interactions with local interneurons are maintained in this isolated olfactory bulb preparation.

Original languageEnglish (US)
Pages (from-to)267-283
Number of pages17
JournalBrain research
Volume211
Issue number2
DOIs
StatePublished - May 4 1981
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

Keywords

  • evoked potentials
  • in vitro preparation
  • long-lasting suppression
  • olfactory bulb
  • olfactory nerve
  • single units
  • supernormal period
  • turtle

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