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.
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Abbreviations
- TAG :
-
terminal abdominal ganglion
- LSI :
-
local spiking interneuron
- LNI :
-
local non-spiking interneurons
- CNS :
-
central nervous system
- PSP :
-
post synaptic potential
- GI :
-
giant interneuron
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Baba, Y., Hirota, K., Yamaguchi, T. et al. Differing afferent connections of spiking and nonspiking wind-sensitive local interneurons in the terminal abdominal ganglion of the cricket Gryllus bimaculatus . J Comp Physiol A 176, 17–30 (1995). https://doi.org/10.1007/BF00197749
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DOI: https://doi.org/10.1007/BF00197749