Differing afferent connections of spiking and nonspiking wind-sensitive local interneurons in the terminal abdominal ganglion of the cricket Gryllus bimaculatus |
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Authors: | Y Baba K Hirota T Yamaguchi T Shimozawa |
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Institution: | (1) Department of Biology, Faculty of Science, Okayama University, 700 Okayama, Japan;(2) Neuro-Cybernetics Laboratory, Section of Informatics and Processing, Research Institute for Electronic Science, Hokkaido University, 060 Sapporo, Japan;(3) Present address: Neuro-Cybernetics Laboratory, Section of Informatics and Processing, Research Institute for Electronic Science, Hokkaido University, 060 Sapporo, Japan;(4) Present address: Supermolecular Science Division, Electrotechnical Laboratory, Tsukuba, 305 Ibaraki, Japan |
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Abstract: | Fifteen local spiking interneurons (LSIs) and twentyone local non-spiking interneurons (LNIs) were identified in the terminal abdominal ganglion (TAG) of the cricket Gryllus bimaculatus on the basis of intracellular recording and staining (Figs. 1, 5, 6). Although the majority of LNIs showed sharp directionalities (Fig. 7) the LSIs did not (Fig. 3). The directionality of LNIs varied with the recording sites within a single cell (Fig. 8). Electrical stimulations of the cereal sensory nerve suggested that the LNIs are connected monosynaptically with the sensory afferents of both the cerci, and that LSIs may possess a variety of bilateral combinations of polysynaptic connections with the sensory afferents. We found that the spiking and the non-spiking local interneurons in the cereal sensory system differ not only in their membrane properties, but also in their afferent connections, and concluded that their differing connectivity to the sensory afferents will associate them with different roles in signal processing.Abbreviations
TAG
terminal abdominal ganglion
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LSI
local spiking interneuron
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LNI
local non-spiking interneurons
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CNS
central nervous system
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PSP
post synaptic potential
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GI
giant interneuron |
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Keywords: | Local interneuron Wind-sensitive cereal system Cricket |
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