PROJECTIONS OF SUBESOPHAGEAL DESCENDING INTERNEURONS IN THORACIC GANGLIA OF THE GRASSHOPPER OMOCESTUS-VIRIDULUS L (ORTHOPTERA, ACRIDIDAE)

ROTH, U and KIEN, J and ALTMAN, JS (1994) PROJECTIONS OF SUBESOPHAGEAL DESCENDING INTERNEURONS IN THORACIC GANGLIA OF THE GRASSHOPPER OMOCESTUS-VIRIDULUS L (ORTHOPTERA, ACRIDIDAE). INTERNATIONAL JOURNAL OF INSECT MORPHOLOGY & EMBRYOLOGY, 23 (3). pp. 275-291. ISSN 0020-7322,

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Abstract

Descending interneurons (DINs) from the suboesophageal ganglion (SOG) and some from the brain of the grasshopper Omocestus viridulus L. (Orthoptera: Acrididae) were stained intracellularly with Lucifer Yellow, and the details of their projections in SOG, prothoracic, and, where possible, mesothoracic ganglion were examined. DINs could be followed through the prothoracic ganglion in only c.10% of the preparations. Several SOG DINs terminated in the prothoracic ganglion, while some terminated in the mesothoracic ganglion. The few DINs, which could be followed through the mesothoracic ganglion, had the same projections in both thoracic ganglia. Three major thoracic projection forms were found: lateral, mediolateral and medial. Most DINs, both from the brain and SOG, branch dorsally in thoracic motor integration neuropiles, although not necessarily exclusively. Two DINs with branches only in the ventral sensory integration areas were found. The arborisation or depth profile of the DINs in the SOG does not correlate with the projection in the thoracic ganglia. The functional consequences for the role of the SOG in suprasegmental motor control are discussed.

Item Type: Article
Uncontrolled Keywords: SUBESOPHAGEAL GANGLION; SCHISTOCERCA-GREGARIA; SPONTANEOUS WALKING; NEURONAL-ACTIVITY; HEAD MOVEMENTS; LOCUST; FLIGHT; ORGANIZATION; MORPHOLOGY; ANATOMY; INSECT DESCENDING INTERNEURONS; THORACIC GANGLION; NEUROPIL; NEURONAL BRANCHING; MOTOR INTEGRATION
Depositing User: Dr. Gernot Deinzer
Last Modified: 19 Oct 2022 08:40
URI: https://pred.uni-regensburg.de/id/eprint/53211

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