Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"antennal lobe"”.
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Analysis of the Molecular Mechanisms of Drosophila Antennal Lobe Development
… converge on one specific glomerulus in the antennal lobe or olfactory bulb, where they synapse with the dendrites of the postsynaptic cells, projection neurons (PNs) or mitral cells. Mutation in derailed/drl gene, a receptor tyrosine kinase, leads to the disruption of the glomerular pattern. …
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Processing of plant-associated odors by a subset of projection neurons in the antennal lobe of the female moth, Manduca sexta
… first-order olfactory center of the brain, the antennal lobe (AL), in female moths. This study focused on a small and identifiable subset of projection neurons within the AL, which have their cell bodies grouped on the anterior surface of the AL (AC neurons). The subpopulation of about 14-20 …
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The Roles of Wnt5 and the Drl Receptor in the Development of the Drosophila Olfactory System
… glomeruli in stereotypic positions of the antennal lobe. Although many studies have revealed the crucial role of projection neurons in the spatial patterning of glomeruli, the potential instructive role of olfactory neurons was not well investigated in Drosophila. In a gain-of-function …
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The Role of Drosophila Odorant Receptors in Odor Coding
… maps of OR-specific neuronal projections to the antennal lobe glomeruli of adult and larval fly brains. We analyzed expression profiles of 42 ORs, 31 of which are expressed in the adult and 21 in the larva, with an overlap of 10 ORs between the two developmental stages. Our results show …
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Establishing Neuronal Diversity: Regulation of olfactory receptor neuron specification and axon guidance in Drosophila
… connect to 50 class-specific glomeruli in the antennal lobe of the brain. Here we demonstrate that a cross regulatory network of transcription factors patterns the antennal disc, which contains ORN precursors and will develop into the antenna. These transcription factors create seven rings that …
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Mapping the Brain of the Clonal Raider Ant: Integrating Behavior, Neuroanatomy and Connectomics
… used identify a core set of glomeruli within the antennal lobe of the ant that is active in response to panic alarm-inducing compounds, including 4-methyl-3-heptanone and 4-methyl-3-heptanol. We have also identified age-related changes in alarm behavior and processing of alarm pheromones in the …
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CRISPR/CASTE: Functional Genomic Studies of the Major Evolutionary Innovations of Ants
… deficiencies, including a loss of most antennal lobe glomeruli and sensory neurons in the antenna. This surprising result implies that orco may play an important role in antennal lobe morphology in ants, and could provide insights into the development and evolution of complex olfactory …
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Time-varying phase relationship between spiking neuronal responses and local field potentials in olfactory processing in manduca sexta
… of the invertebrate olfactory system - the antennal lobe - by proposing that activated primary output neurons participate in the encoding ensemble only transiently, based on the coincidence of their spiking relative to local field potential (LFP) oscillation phase. Using the sphinx moth, …
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Transgenic Tools in Ants and the Representation of Alarm Pheromones in the Ant Antennial Lobe
… fly, the primary olfactory processing centers (antennal lobes) contain an order of magnitude more functional units compared to the vinegar fly, presumably to facilitate detecting and discriminating between vast numbers of pheromones. The discovery of additional developmental differences between …
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Neural Dynamics, Adaptive Computations, and Sensory Invariance in an Olfactory System
… in the locust olfactory system. In the locust antennal lobe (analogous to the vertebrate olfactory bulb), a neural circuit directly downstream to the olfactory sensory neurons, even simple stimuli evoke neural responses that are complex and dynamic. We found each odorant activated a distinct …
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Non-Canonical Odor Coding Ensures Robust Mosquito Attraction to Humans
… to discrete regions, called glomeruli, in the antennal lobe or olfactory bulb, respectively. This organization is believed to be a widespread motif in olfactory systems and has been established dogma since the mid-2000s and is hypothesized to permit the brain to parse which subpopulation of …
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Mushroom body expansion and the cognitive ecology of Heliconius butterflies
… for the size of the central brain, the antennal lobe and the medulla. Moreover, variable rates analyses indicate that the branch leading to Heliconius experienced a significant increase in the rate of evolution of MB size. But what drove this expansion? There are two main adaptive …
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Sensory Ecology of Foraging in Bumblebees
… Bombus terrestris and the effect of scaling on antennal olfactory sensilla and the first olfactory neuropil in the bumblebee brain, the antennal lobes. I found that the pronounced size polymorphism exhibited by bumblebees also effects their olfactory system. Sensilla number (I measured the most …
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Electrophysiological and morphological analyses in two species of insects, Protophormia terraenovae and Ceratitis capitata
… Section 2: Morphological characterization of the antennal lobes in the Mediterranean fruit fly Ceratitis capitata The medfly (Ceratitis capitata Wied.) is one of the most important pest for horticulture, targeting a great variety of fruit and vegetables species worldwide. Due to its commercial …
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The organisation of a third-order olfactory brain region in the vinegar fly
Neural representations of the chemosensory world generate both learned and instinctive behaviours. Olfactory systems detect a huge range of volatiles by combining patterns of activity across input channels. The lateral horn of the fly informs innate behaviours by combining patterns of second-order …