Structure and development of the insect antennodeutocerebral system

Rospars, Jean-Pierre

doi:10.1016/0020-7322(88)90041-4

Cited by 168 publications

(104 citation statements)

References 163 publications

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“…Data from the spider mite, Phytoseiulus persimilis Athias-Henriot, also suggest that the olfactory lobe of mites have a glomerular organisation (Van Wijk et al 2006). Sexual dimorphism on the basis of particular specialised glomeruli and on varying glomeruli numbers has been described in species belonging to Dictyoptera, Hymenoptera, Lepidoptera, and Diptera (Anton and Homberg 1999, Hansson and Anton 2000, Rospars 1988). The functional significance of the observed sexual dimorphism in mosquitoes, including differences in number, shape and size of particular glomeruli ( Figure 6D, Ghaninia et al 2007a, is still to be revealed.…”

Section: Antennal Lobe Glomeruli -The First Relay Stations In the Cenmentioning

confidence: 99%

Olfaction in vector-host interactions

Takken¹,

Knols²

2010

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Section: Antennal Lobe Glomeruli -The First Relay Stations In the Cenmentioning

confidence: 99%

Olfaction in vector-host interactions

Takken¹,

Knols²

2010

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“…Across many species, the functional organization of the AL is conserved (Galizia 2008), while the number of glomeruli is variable depending on the species (Rospars 1988;Schachtner et al 2005). Importantly, glomeruli form the functional units of the olfactory code at this level of processing.…”

Section: Introductionmentioning

confidence: 99%

Morphological characterization of the antennal lobes in the Mediterranean fruit fly Ceratitis capitata

et al. 2015

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The medfly Ceratitis capitata is one of the most important pests for horticulture worldwide. The knowledge about anatomy and function of the medfly olfactory system is still limited. The first brain structure to process olfactory information in insects is the antennal lobe (AL), which is composed of its functional and morphological units, the olfactory glomeruli. Here, we present a morphological three-dimensional reconstruction of AL glomeruli in adult brains. We used unilateral antennal backfills of olfactory receptor neurons (ORNs) with neural tracers, revealing the AL structure. We recorded confocal stacks acquired from whole-mount specimens, and analyzed them with the software AMIRA. The ALs in C. capitata are organized in glomeruli which are more tightly packed in the anterior part than the posterior one. Axons of ORNs bilaterally connect the ALs through a commissure between the two ALs. This commissure is formed by several distinct fascicles. Contralateral dye transfer suggests the presence of gap junctions connecting ORNs from both antennae. There was no statistical difference between the average volumes of female ALs (204,166 ± 12,554 μm(3)) and of male ALs (190,287 ± 11,823 μm(3)). In most specimens, we counted 53 glomeruli in each AL, seven of which were sexually dimorphic in size

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“…The ORN axons project to the antennal lobe in the brain where they make synaptic contacts with cerebral neurons within discrete, spherical neuropils called glomeruli. In Drosophila all ORNs projecting to a given glomerulus express the same receptor protein and each ORN projects only to one or in exceptional cases a few glomeruli (Vosshall et al, 2000), which explains that glomeruli in insects are individually identifiable (Rospars, 1988).…”

Section: Introductionmentioning

confidence: 99%

Modelling the signal delivered by a population of first-order neurons in a moth olfactory system

Grémiaux¹,

Nowotny²,

Martinez³

et al. 2012

Brain Research

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(2012) Modelling the signal delivered by a population of first-order neurons in a moth olfactory system. Brain Research, 1434. pp. 123-135. ISSN 0006-8993 This version is available from Sussex Research Online: http://sro.sussex.ac.uk/38437/ This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright and reuse:Sussex Research Online is a digital repository of the research output of the University.Copyright and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable, the material made available in SRO has been checked for eligibility before being made available.Copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way.Grémiaux et al. Highlights > Odour intensity coding in a whole population of moth receptor neurons was modelled. > Frequency (spikes per second) and latency of the first spike were analyzed > The model accounts for the statistical distributions of frequencies and latencies. > The same dose-frequency relation applies at the single cell and population levels. > Predictions based on a biophysical model of frog olfactory neurons are confirmed. Abstract.A statistical model of the population of first-order olfactory receptor neurons (ORNs) is proposed and analysed. It describes the relationship between stimulus intensity (odour concentration) and coding variables such as rate and latency of the population of several thousand sex-pheromone sensitive ORNs in male moths. Although these neurons likely express the same olfactory receptor, they exhibit, at any concentration, a relatively large heterogeneity of responses in both peak firing frequency and latency of the first action potential fired after stimulus onset. The stochastic model is defined by a multivariate distribution of six model parameters that describe the dependence of the peak firing rate and the latency on the stimulus dose. These six parameters and their mutual linear correlations were estimated from experiments in single ORNs and included in the multidimensional model distribution. The model is utilized to reconstruct the peak firing rate and latency of the message sent to the brain by the whole ORN population at different stimulus intensities and to establish their main qualitative and quantitative properties. Finally, these properties are shown to be in agreement with those found previously in a vertebrate ORN population.

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Structure and development of the insect antennodeutocerebral system

Cited by 168 publications

References 163 publications

Olfaction in vector-host interactions

Olfaction in vector-host interactions

Morphological characterization of the antennal lobes in the Mediterranean fruit fly Ceratitis capitata

Modelling the signal delivered by a population of first-order neurons in a moth olfactory system

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