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• W2151501184 startingPage "20140432" @default.
• W2151501184 abstract "Hymenoptera possess voluminous mushroom bodies (MBs), brain centres associated with sensory integration, learning and memory. The mushroom body input region (calyx) is organized in distinct synaptic complexes (microglomeruli, MG) that can be quantified to analyse body size-related phenotypic plasticity of synaptic microcircuits in these small brains. Leaf-cutting ant workers ( Atta vollenweideri ) exhibit an enormous size polymorphism, which makes them outstanding to investigate neuronal adaptations underlying division of labour and brain miniaturization. We particularly asked how size-related division of labour in polymorphic workers is reflected in volume and total numbers of MG in olfactory calyx subregions. Whole brains of mini, media and large workers were immunolabelled with anti-synapsin antibodies, and mushroom body volumes as well as densities and absolute numbers of MG were determined by confocal imaging and three-dimensional analyses. The total brain volume and absolute volumes of olfactory mushroom body subdivisions were positively correlated with head widths, but mini workers had significantly larger MB to total brain ratios. Interestingly, the density of olfactory MG was remarkably independent from worker size. Consequently, absolute numbers of olfactory MG still were approximately three times higher in large compared with mini workers. The results show that the maximum packing density of synaptic microcircuits may represent a species-specific limit to brain miniaturization." @default.
• W2151501184 created "2016-06-24" @default.
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• W2151501184 date "2014-06-22" @default.
• W2151501184 modified "2023-10-08" @default.
• W2151501184 title "Density of mushroom body synaptic complexes limits intraspecies brain miniaturization in highly polymorphic leaf-cutting ant workers" @default.
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• W2151501184 doi "https://doi.org/10.1098/rspb.2014.0432" @default.
• W2151501184 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4024300" @default.
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• W2151501184 hasPublicationYear "2014" @default.
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