Directional sensitivity of dendritic calcium responses to wind stimuli in the cricket giant interneuron

Hiroto Ogawa, Yoshichika Baba, Kotaro Oka

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We examined directional sensitivities in the dendritic activity of the identified giant interneurons (GIs) in the cricket, using in vivo Ca 2+ imaging during different directional air-current stimuli. Air current stimulus evoked action potential burst and quick Ca2+ increase in GI. The stimulus direction of the maximal Ca2+ responses corresponded to that of the maximal voltage response. However, the shapes of the directional tuning curves based on the Ca2+ responses for each dendritic branch were different from the overall tuning curve based on spike counts for the cell. Moreover, different dendritic branches displayed distinct directional sensitivity profiles to the air-current stimuli. We propose that postsynaptic activities will influence the local Ca2+ signals in the distal dendrites, and produce the difference in directional sensitivity of the dendritic Ca2+ response.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalNeuroscience Letters
Issue number3
Publication statusPublished - 2004 Apr 1


  • Air current stimulus
  • Ca imaging
  • Cricket
  • Dendritic activity
  • Directional sensitivity
  • Giant interneuron
  • Oregon Green 488 BAPTA-1
  • Voltage-dependent calcium channel

ASJC Scopus subject areas

  • Neuroscience(all)


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