Differing afferent connections of spiking and nonspiking wind-sensitive local interneurons in the terminal abdominal ganglion of the cricketGryllus bimaculatus

✍ Scribed by Y. Baba; K. Hirota; T. Yamaguchi; T. Shimozawa

• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 972 KB
• Volume: 176
• Category: Article
• ISSN: 0340-7594
• DOI: 10.1007/bf00197749

✦ Synopsis

Fifteen local spiking interneurons (LSIs) and twenty-one local nonspiking 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 cercal 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 nonspiking local interneurons in the cercal 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.