Calcium wave propagation in the giant axon of the earthworm

Hiroto Ogawa, Kotaro Oka, Shozo Fujita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We examined a spatio-temporal pattern of intracellular free Ca2+ concentration in the giant axons of the earthworm, Eisenia foetida, with a fluorescent imaging technique using conforcal laser-scanning microscope and calcium indicator, 'Calcium Green 1'. Electrical tetanic stimulation applied to the nerve cord induced calcium waves along the giant axon. The calcium waves propagated both anteriorly and posteriorly with various speeds, and sometimes were split into several waves with different velocities. The results suggest that some types of calcium-releasing mechanisms may be associated with the calcium wave propagation.

Original languageEnglish
Pages (from-to)45-49
Number of pages5
JournalNeuroscience Letters
Issue number1-2
Publication statusPublished - 1994 Sept 26
Externally publishedYes


  • Ca-induced Ca release
  • Calcium imaging
  • Calcium wave
  • Earthworm
  • Lateral giant fiber
  • Median giant fiber

ASJC Scopus subject areas

  • General Neuroscience


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