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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-, meso-, and metathoracic areas (LD I-III). Cell bodies are located in the dorsal protocerebral lobes and pars intercerebralis, except the PS II neuron and three LD cells, which are located in the ipsilateral posterior protocerebrum. This is the first report about ocellar pathways in Hemiptera. Their adaptive function is discussed with reference to the bugs' behavior as Chagas disease vectors.

Registro:

Documento: Artículo
Título:Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
Autor:Insausti, T.C.; Lazzari, C.R.
Filiación:Lehrstuhl für Biokybernetik, Universität Tübingen, Tübingen, Germany
Departamento de Biología, Facultad de Cs. Exactas y Naturelles, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Departamento de Biologia, Facultad de Cs Exactas y Naturales, Crudad Universitaria, 1428 Buenos Aires, Argentina
Año:1996
Volumen:229
Número:2
Página de inicio:161
Página de fin:169
DOI: http://dx.doi.org/10.1002/(SICI)1097-4687(199608)229:2<161::AID-JMOR2>3.0.CO;2-4
Título revista:Journal of Morphology
Título revista abreviado:J. MORPHOL.
ISSN:03622525
CODEN:JOMOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03622525_v229_n2_p161_Insausti

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Citas:

---------- APA ----------
Insausti, T.C. & Lazzari, C.R. (1996) . Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae). Journal of Morphology, 229(2), 161-169.
http://dx.doi.org/10.1002/(SICI)1097-4687(199608)229:2<161::AID-JMOR2>3.0.CO;2-4
---------- CHICAGO ----------
Insausti, T.C., Lazzari, C.R. "Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)" . Journal of Morphology 229, no. 2 (1996) : 161-169.
http://dx.doi.org/10.1002/(SICI)1097-4687(199608)229:2<161::AID-JMOR2>3.0.CO;2-4
---------- MLA ----------
Insausti, T.C., Lazzari, C.R. "Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)" . Journal of Morphology, vol. 229, no. 2, 1996, pp. 161-169.
http://dx.doi.org/10.1002/(SICI)1097-4687(199608)229:2<161::AID-JMOR2>3.0.CO;2-4
---------- VANCOUVER ----------
Insausti, T.C., Lazzari, C.R. Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae). J. MORPHOL. 1996;229(2):161-169.
http://dx.doi.org/10.1002/(SICI)1097-4687(199608)229:2<161::AID-JMOR2>3.0.CO;2-4