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

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 i...

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Detalles Bibliográficos
Autores principales: Insausti, T.C., Lazzari, C.R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03622525_v229_n2_p161_Insausti
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03622525_v229_n2_p161_Insausti
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spelling todo:paper_03622525_v229_n2_p161_Insausti2023-10-03T15:26:51Z Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae) Insausti, T.C. Lazzari, C.R. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03622525_v229_n2_p161_Insausti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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.
format JOUR
author Insausti, T.C.
Lazzari, C.R.
spellingShingle Insausti, T.C.
Lazzari, C.R.
Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
author_facet Insausti, T.C.
Lazzari, C.R.
author_sort Insausti, T.C.
title Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
title_short Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
title_full Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
title_fullStr Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
title_full_unstemmed Central projections of first-order ocellar interneurons in the bug Triatoma infestans (Heteroptera: Reduviidae)
title_sort central projections of first-order ocellar interneurons in the bug triatoma infestans (heteroptera: reduviidae)
url http://hdl.handle.net/20.500.12110/paper_03622525_v229_n2_p161_Insausti
work_keys_str_mv AT insaustitc centralprojectionsoffirstorderocellarinterneuronsinthebugtriatomainfestansheteropterareduviidae
AT lazzaricr centralprojectionsoffirstorderocellarinterneuronsinthebugtriatomainfestansheteropterareduviidae
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