Response patterns of 11 classes of the four morphological types of sensilla trichodea on the antennae of female , representing 18 functional types and four non-responding types of ORNs

<p><b>Copyright information:</b></p><p>Taken from "Functional classification and central nervous projections of olfactory receptor neurons housed in antennal trichoid sensilla of female yellow fever mosquitoes, "</p><p></p><p>The European Journal of Neuroscience 2007;26(6):1611-1623.</p><p>Published online Jan 2007</p><p>PMCID:PMC2121139.</p><p>© The Authors (2007). Journal Compilation © Federation of European Neuroscience Societies and Blackwell Publishing Ltd</p> This classification is based on a cluster analysis of the ORNs to a set of 16 odorants (presented on the left sides of the histograms). In all types, two neurons, i.e. A and B, were found. The neuronal responses of A and B are shown as average over () replicates, which for each functional type are presented in the graph. 2BE, 2-butoxyethanol; 4MCH, 4-methylcyclohexanol; lst, long sharp-tipped; sbtI, short blunt-tipped I; sbtII, short blunt-tipped II; sst, short sharp-tipped sensilla trichodea. The units for the abscissa are spikes/s

(A) Scanning electron micrograph of the head of a female shows the olfactory organs, the antennae (Ant) and maxillary palps (Mp)

<p><b>Copyright information:</b></p><p>Taken from "Functional classification and central nervous projections of olfactory receptor neurons housed in antennal trichoid sensilla of female yellow fever mosquitoes, "</p><p></p><p>The European Journal of Neuroscience 2007;26(6):1611-1623.</p><p>Published online Jan 2007</p><p>PMCID:PMC2121139.</p><p>© The Authors (2007). Journal Compilation © Federation of European Neuroscience Societies and Blackwell Publishing Ltd</p> (B) Scanning electron micrograph of an individual segment of the antenna of the same female shows the four sub-types of olfactory sensilla trichodea: short sharp-tipped (sst); short blunt-tipped I (sbtI); short blunt-tipped II (sbtII); and long sharp-tipped (lst)

Summary schematic of the antennal lobe projections of the different classes of the receptor neurons (A and B)

<p><b>Copyright information:</b></p><p>Taken from "Functional classification and central nervous projections of olfactory receptor neurons housed in antennal trichoid sensilla of female yellow fever mosquitoes, "</p><p></p><p>The European Journal of Neuroscience 2007;26(6):1611-1623.</p><p>Published online Jan 2007</p><p>PMCID:PMC2121139.</p><p>© The Authors (2007). Journal Compilation © Federation of European Neuroscience Societies and Blackwell Publishing Ltd</p> The 3D reconstructions and glomerular nomenclature are after Ignell (2005). Letters mentioned in parenthesis refer the functional classes of the receptor neurons

Single-sensillum recordings from short sharp-tipped sensilla trichodea, later classified as sst1

<p><b>Copyright information:</b></p><p>Taken from "Functional classification and central nervous projections of olfactory receptor neurons housed in antennal trichoid sensilla of female yellow fever mosquitoes, "</p><p></p><p>The European Journal of Neuroscience 2007;26(6):1611-1623.</p><p>Published online Jan 2007</p><p>PMCID:PMC2121139.</p><p>© The Authors (2007). Journal Compilation © Federation of European Neuroscience Societies and Blackwell Publishing Ltd</p> Electron and light microscopic photographs of the sensillum type are shown in (A) and (B) , respectively. (C) Spontaneous activity of the ORNs housed in the sensillum reveals differences in spike amplitude between A and B neurons. Distribution of spike amplitudes of the two neurons is shown in (D). In response to a 0.5 s odour stimulation, the ORNs exhibited two modes of responses, excitatory when they were stimulated with 2-butoxyethanol (2BE) and indole (E and F), and inhibitory when they were stimulated with propionic acid (G). Filled and open circles indicate large and small action potentials from the A and B neurons, respectively