Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)

Journal of Morphology
T C Insausti, C R Lazzari

Abstract

The projections of first-order ocellar interneurons were analyzed in the hematophagous bug Triatoma infestans by cobalt filling. The axons run between the calyces of the mushroom bodies and dorsal of the central body to different regions of the brain and the subesophageal and thoracic ganglia. The interneurons can be grouped into large L cells and small S cells. The L cells have cell bodies ranging from 11.5 to 25 μm and axons ranging from 8 to 25 μm diameter (measured in the ocellar nerve); the S cells have smaller cell bodies of 9 μm or less and axon diameters less than 5 μm. The projections of ten L cells are described in detail; they project to the protocerebral posterior slope (PS), the other ocellus (O), the optic neuropile, and the subesophageal, pro-, meso-, and metathoracic ganglia, either to ipsi- (PS I, II), or contra- (PS IV, V), or bilateral areas. In this case projections occur to the same areas (PSO, PS III) or different areas at each side (PSOE; E = eye). Large-descending (LD) first-order interneurons project to the contralateral posterior slope of the protocerebrum, the deutocerebrum, and subesophageal, pro-, mesa-, and metathoracic areas (LD I-III). Cell bodies are located in the dorsal protocerebral lobes and...Continue Reading

References

Jan 1, 1992·Medical and Veterinary Entomology·C J SchofieldD E Gorla
Sep 1, 1994·Journal of Morphology·T C Insausti
Apr 12, 1985·Science·K Fent, R Wehner

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Citations

Mar 6, 2002·Microscopy Research and Technique·Peter J Simmons
May 9, 2000·Memórias do Instituto Oswaldo Cruz·T C Insausti, C R Lazzari
Sep 21, 2000·Memórias do Instituto Oswaldo Cruz·T C Insausti, C R Lazzari
Nov 21, 2002·Tissue & Cell·T C Insausti, C R Lazzari
Aug 23, 2011·Journal of Insect Physiology·Claudio R LazzariTeresita C Insausti

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