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Neurosci Lett. 1999 Nov 5;275(1):61-4.

Dendritic Ca2+ transient increase evoked by wind stimulus in the cricket giant interneuron.

Author information

1
Kawachi Millibioflight Project, ERATO, Meguro, Tokyo, Japan. hogawa@saitama-med.ac.jp

Abstract

In vivo Ca2+ imaging was applied to the cricket median giant interneuron (MGI), to visualize the dendritic processing of mechanosensory signals. Wind stimulation (air-puff) to the cerci induced a transient increase in the cytosolic Ca2+ concentration ([Ca2+]i) in the MGI with a latency of a few seconds, suggesting the release of Ca2+ from the intracellular store site in the MGI. The amplitude of the transient increase in [Ca2+]i in the dendrites depended on the direction of the air-puff, and the increase in [Ca2+]i evoked by the air-puff was suppressed by the hyperpolarizing current injection which blocked the generation of action potentials. These results indicate that the action potential is necessary to the direction-sensitive increase in [Ca2+]i induced by wind stimulation.

PMID:
10554985
DOI:
10.1016/s0304-3940(99)00744-2
[Indexed for MEDLINE]

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