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Neuronal maps of the frontal ganglion of the cockroach, Periplaneta americana , prepared by heavy metal iontophoresis
Author(s) -
Jagota Anita,
Habibulla M.
Publication year - 1992
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1052130302
Subject(s) - periplaneta , cockroach , biology , iontophoresis , blattidae , commissure , anatomy , ganglion , anterior commissure , staining , american cockroach , electrophysiology , dictyoptera , suboesophageal ganglion , silver stain , neuroscience , microbiology and biotechnology , ecology , genetics
Neurons in whole mount preparations of the frontal ganglion (FG) of the cockroach, Periplaneta americana , were mapped with the aid of cobalt chloride staining and silver intensification techniques. Eighty‐six neurons were counted in the FG after staining with reduced methylene blue. The cell size ranged between 20 to 35 μm in diameter. Of the somata located in the FG, 44 were found to contribute their fibers to the nervus recurrens, 26 to the right frontal commissure, 28 to the left frontal commissure, and 6 to the nervus connectivus. In addition, a few neurons presumably from the tritocerebral region also contribute their fibers in the formation of nervus connectivus. The present study has helped delineate the neuronal connections of the FG with the brain and neuroendocrine system (corpora cardiaca and corpora allata). This information will be useful in facilitating the positioning of microelectrodes in our future electrophysiological experiments. © 1992 Wiley‐Liss, Inc.