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.
Results
Showing 1 to 20 of 451 for “"olfactory"”.
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Symbolic olfactory display
… built to explore the use of computer-controlled olfactory display, and some pilot studies of issues related to such display. I quantify human physical limitations on olfactory input, and conclude that olfactory display must rely on differences between smells, and not differences in intensity of …
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Olfactory Receptor Antagonism in the OR-I7 Aldehyde Receptor and the Mammalian Olfactory System
… is initiated when an odorant binds and activates olfactory receptors (ORs) within the nose. Chapter 1 studies the structural requirements for activation of the OR-I7 aldehyde receptor. Octanal is an agonist of the OR-I7 receptor. 4-Ethylcyclohexylacetaldehyde (<strong>1.1)</strong>, with a …
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The Guidance of Olfactory Sensory Axons to Identifiable Protoglomeruli in the Larval Zebrafish Olfactory Bulb
During development, sensory neurons in the olfactory epithelium extend axons into the olfactory bulb. The earliest axons to enter the bulb terminate onto distinct neuropilar condensations called protoglomeruli. Protoglomeruli are thought to segregate into individual glomeruli later in development. …
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Brain-behavioural olfactory asymmetries in Apoidea
… can be exploited. Here I described a study on olfactory lateralization in a primitively eusocial species of Apoidea, B. terrestris. I reported here that this species showed a direction in the behavioural asymmetry of short-term odour memory, but only individual-level differences in odour …
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Aversive Olfactory Imprinting in Caenorhabditis Elegans
<p>Early memories are especially robust and enduring, among which the most evocative example is imprinting. Imprinting was first described in newly hatched geese that form a lasting attachment to the first moving object they see. As observed in many animal species, imprinting is a process in which …
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Human Olfactory Perception: A Literature Review
… cognitive and affective responses to olfactory stimuli even when the stimuli were perceived unconsciously. The mechanism by which humans perceive these signals is unclear; there is much debate as to whether the vomeronasal organ is functional in humans. Regardless of the mechanism of …
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Connectivity of olfactory bulb dopaminergic interneurons
… a vast amount of local processing happens in the olfactory bulb, where the olfactory signal enters the brain. As such, the olfactory bulb is home to a large and diverse population of inhibitory interneurons that greatly outnumber the excitatory neurons. These are responsible for processing the …
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Robotic Olfactory-Based Navigation with Mobile Robots
… finding an odor source is designing an effective olfactory-based navigation algorithm, which guides the robot to detect emitted odor plumes as cues in finding the source. This dissertation proposes three kinds of olfactory-based navigation methods to improve search efficiency while maintaining a …
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Localizing engrams of olfactory memories in Drosophila
… were able to localize 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 …
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Critical Period for Murine Olfactory Map Formation
… in mice to perturb the projection pattern of olfactory sensory neurons (OSNs) during postnatal development. I observed a critical period during the formation of the olfactory circuit. Neurons generated during and after the critical period adopted different mechanisms in axon targeting. The …
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Mechanisms of Olfactory Plasticity in Caenorhabditis Elegans
… of experience-dependent plasticity. Using an olfactory adaptation paradigm in which animals lose attraction to butanone after it is paired with starvation, I here describe neuronal and molecular mechanisms that are associated with and necessary for plasticity in C. elegans. In Chapter 2, I …
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Structure-Function Analysis of Insect Olfactory Receptors
… the external environment and the organism is the olfactory sensory neuron (OSN), whose activation translates the intensity, quality, and temporal features of volatile chemicals into spike trains. This dissertation focuses on understanding how the insect olfactory system functions at the periphery, …
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COVID-19, Olfactory Functioning, and Depressive Symptoms
… symptoms and the Assessment of Self-Reported Olfactory Functioning and Olfaction-Related Quality of Life (ASOF) to assess olfactory functioning. Additionally, general survey questions were asked to evaluate physical and mental health outcomes related to COVID-19. Results showed individuals who …
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Axon Guidance In The Mouse Olfactory System
Within the mouse olfactory system, 1200 different types of olfactory sensory neurons use molecular cues to appropriately target stereotyped locations within the olfactory bulb. Recent studies reveal that some of these molecular cues are regulated by olfactory receptor mediated neuronal activity. …
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The Logic of Innately Aversive Olfactory Pathways
… in the circuitry of the brain? We used the olfactory sensory circuit of a microbial odorant, geosmin, as a model to understand how an innately aversive olfactory signal is processed in the brain in order to produce an appropriate behavioural response. We used connectomics, functional …
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Lessons in smelling : essays on olfactory perception
This three-paper dissertation focuses on olfactory perception, with each paper exploring an ongoing debate in the perceptual literature through the olfactory 'lens'. Philosophers of perception have typically assumed what I call the Unification Thesis: the thesis that certain philosophical issues …
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Encoding and Processing of Accessory Olfactory System Odorants
The accessory olfactory system is a mouse olfactory subsystem dedicated to the processing of nonvolatile odors originating from the excretions of other animals. Accessory olfactory system activity drives behaviors critical for mouse survival such as mating, aggression, and predator avoidance. …
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Sensory Coding and Olfactory Integration in Caenorhabditis Elegans
… a distance. How does an animal integrate the olfactory information from its environment? Here, I ask how multiple sensory neurons drive and shape one interneuron's activity. C. elegans senses several odors, including the bacterial metabolite diacetyl, using the AWA sensory neurons. AWA forms …
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