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 20 of 26 for “"mushroom bodies"”.
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Experience-Dependent Plasticity in the Mushroom Bodies of the Honey Bee Brain
… that travel from the antennal lobes to the mushroom bodies. Previous work has shown that forager bees have an increase in volume of the neuropil associated with the mushroom bodies, a region of the insect brain implicated in learning, memory, and multimodal sensory integration. To study this …
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Postembryonic Development and Adult Plasticity of the Mushroom Bodies in the Honey Bee Brain
The mushroom bodies are distinctive, paired neuropils in the insect brain. Convergence of numerous sensory modalities in the mushroom bodies indicates that they may be a center for sensory integration. Ablation and lesioning experiments have also established a role for this brain region in …
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Mosaic Analysis of Neurogenesis and Neuronal Morphogenesis in Drosophila Learning and Memory Center Mushroom Bodies
Based on the above findings, a forward genetic screen using MARCM (m&barbelow;osaic a&barbelow;nalysis with r&barbelow;epressible c&barbelow;ell m&barbelow;arker) system, which uniquely labels wild type or homozygous mutant single-cell or subcell lineages born at specific developmental stages, was …
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The adaptive benefits of adult structural plasticity in the mushroom bodies of freely behaving forager honey bees
The mushroom bodies (MBs) are insect brain regions associated with sensory integration and learning. The dendrites of the intrinsic MB neurons (the Kenyon cells) are in the calycal neuropil, where they receive input from primary sensory neuropils. The calyces are larger in older forager honey bees …
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Molekulare und funktionelle Analyse der p21-aktivierten Kinase Mbt (mushroom bodies tiny) in der Augen- und Pilzkörperentwicklung von Drosophila melanogaster
Diese Arbeit beschäftigt sich mit Mbt, einem hochkonservierten Signalmolekül aus der Familie der p21-aktivierten Kinasen (PAK) aus Drosophila, während der Augen- und Pilzkörperentwicklung. Mbt wird aufgrund von Sequenzhomologien der PAK Unterfamilie II (PAK4-6) zugeordnet. PAK4-6 binden …
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The Opsins and Nuclear Receptors of the Honey Bee
… regulators of neuronal plasticity in the insect mushroom bodies. The brains of older bees exhibit an expansion of the neuropil of the mushroom bodies relative to younger workers. Nuclear receptors transduce 20-hydroxyecdysone and juvenile hormone signals to regulate insect development through a …
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Transcriptional response to spatial learning and foraging in honey bees: molecular bases for adult neuroplasticity
… growth and remodeling of processes in the mushroom bodies, a paired region of the insect brain involved in sensory integration, learning and memory. Honey bees (Apis mellifera) learn to navigate in the environment surrounding the hive by performing orientation flights for several days …
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IMPACT OF PESTICIDES ON THE NEURAL STRUCTURE OF THE HONEY BEE, APIS MELLIFERA
… and memory in the honey bee, Apis mellifera. The mushroom bodies, insect brain regions required for learning and memory, receive GABAergic inputs that may be sensitive to fipronil. The synaptic organization of the mushroom bodies was investigated in adult worker honey bees exposed to fipronil …
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Mushroom body expansion and the cognitive ecology of Heliconius butterflies
… of an insect brain structure called the mushroom bodies (MBs), which are 3-4 times larger than in other Lepidoptera, including closely related Heliconiini genera. MBs are known to play a role in learning and memory, particularly in olfactory contexts, however the relative cognitive …
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Localizing engrams of olfactory memories in Drosophila
… an engram of aversive olfactory memory to the mushroom bodies of Drosophila (Zars et al., 2000). In this thesis, I followed up on this finding in two ways. Inspired by Zars et al. (2000), I first focused on the whether it would also be possible to localize memory extinction.While memory …
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Elucidating the neural circuitry underlying social spacing in Drosophila melanogaster through the lens of neuroligin 3
… that nlg3-expressing neurons, along with the mushroom bodies and protocerebral bridge, were involved in this behaviour. I determined that all the aforementioned structures are involved, and there is likely sexual dimorphism in this neural circuitry. This research contributes to understanding …
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The role of ras signaling associative learning and memory in Drosophila
… when expression of the transgene occurred in the mushroom bodies (MBs), the center for the associative learning and memory. Acute induction of dominant-active ras expression also resulted in a learning impairment. Simple sensorimotor functions and overall MB morphology were normal in all the flies …
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Odor intensity learning in Drosophila
… relies on the known cAMP signaling pathway. Mushroom bodies (MB) have been shown to be necessary and sufficient for this type of memory, and the MB-model of odor learning and short-term memory was established. Yet, theoretically, based on the MB-model, flies should not be able to learn …
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Octopaminergic Regulation of Olfactory Discrimination in the Drosophila Larval Mushroom Body Calyx
The mushroom bodies of insect brains are essential for memory formation. The sensory input region of the mushroom bodies, the calyx, processes information received from stereotypic olfactory input channels, the Projection Neurons (PNs). Mushroom body neurons, Kenyon cells (KCs), integrate these …
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New Methods for Characterizing the Complex Neural Circuitry of the Adult Drosophila Brain
… regulation, resembling development of the mushroom bodies (MB's), sites involved heavily in olfactory learning. In addition, EB neuron birth and axon development are widely separated in time making them ideal model neurons for further studies. Second, comparative genetic mosaic analysis of …
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Compartmentalization and axon guidance in the Drosophila brain
… system of Ptpmeg mutants reveals a defect in the mushroom bodies (MB), brain structures required for olfactory learning and memory. In mutant animals, the MB lobes are disorganized and fail to elaborate their characteristic structure. I find
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Proximate and ultimate factors influencing honey bee reproductive-related behavior
… flight behavior of drones. RNA sequencing on the mushroom bodies of the brain revealed that unique gene expression changes are associated with the initiation of the instinctive behavior as compared to the learned behavior. The results indicate that the instinctive flight behavior of drones is not …
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Casein-Kinase-2-Beta und neuronale Entwicklungsprozesse
… zu erforschen. In dieser Arbeit wurde mushroom bodies undersized P1 (mbuP1) als eine durch Transposon- Insertion in den Casein-Kinase-2ß-Genlokus verursachte, hypomorphe Mutation identifiziert, die zu einer starken Verringerung der Anzahl der die Pilzkörper bildenden intrinsischen …
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Defining Genes and Circuits Affecting Naïve and Experience-Dependent Alcohol Preference in Drosophila melanogaster
… contrast, flies specifically lacking Rsu1 in the mushroom bodies show normal initial aversion to alcohol, but then fail to acquire ethanol preference like normal flies do. Our data show that not only is Rsu1 required for normal alcohol responses, it suggests that different anatomical brain …
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Systematics and taxonomy of polyclad flatworms with a special emphasis on the morphology of the nervous system
… forming structures similar to arthopod mushroom bodies, may be an indication of an early evolutionary adaptation.</p>
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