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 29 for “"Behavioral states"”.
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A posture-based Markov analysis of behavioral states in Caenorhabditis elegans
… degrees of complexity coordinate their diverse behavioral outputs over time, yet the internal neural dynamics underlying such behavioral organization is not completely understood. Behavior coordination can be captured through the quantitative description and subsequent analysis of behavioral …
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Interactions between anterior thalamus and hippocampus during different behavioral states in the rat by Héctor Penagos.
… is related to activity in the hippocampus during behavioral states characterized by hippocampal replay remains unknown. Here, we monitor and compare thalamic and hippocampal activities during epochs in which rats execute a simple alternation task on a circular maze as well as during sleep periods …
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Behavioral and Electromyographic Comparisons of Neuroleptic and Opiate Catalepsy in Rats
… haloperidol produce two distinct and contrasting behavioral states, which can be thought of as exaggerated, isolated, and simplified forms of organized adaptive behavioral states functioning as components of normal motivated behavior. Haloperidol ca
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Genetic and Neural Circuit Analyses of Sickness and Foraging Behaviors in C. elegans
… be critical for animals to generate long-lasting behavioral states crucial for survival. However, our understanding of the specific mechanisms by which neuromodulators alter circuit function to drive context-relevant and stable behavioral states remains limited. In this thesis, we provide new …
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The Effect of Boat Type on Bottlenose Dolphin (<i>Tursiops trucatus</i>) Behavior in the Mississippi Sound
… how different boat types impacted dolphins’ behavioral states. This study is unique in its capacity to assess the effect of all major boat types in a given area. Common boat types in the Mississippi Sound were operationally defined as sailboats, recreational boats, fishing boats, shrimp …
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The effect of a visual stimulus on behavioral state and visual responsiveness in preterm infants
Behavioral organization in infants can be characterized by the integration and coordination of component behaviors over time, mediated in part by emerging nervous system activity. This study evaluated the organization of behavioral states and the percentages of time spent in particular behavioral …
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Electrical stimulation of the ventral lateral periaqueductal gray induces antinociception in rats
… of anesthetic drugs remains high. Among the key behavioral states of general anesthesia is antinociception (reduced sensitivity to pain). Within the nociceptive pathway in the brain and the central nervous system, the periaqueductal gray (PAG) has been shown to be a key site that modulates …
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A Mathematical Model of the Sleep-Wake Cycle
… cycle usually consists of three distinct states: wakefulness, non-rapid-eye-movement (NREM) and rapid-eye-movement (REM). The process of switching between different states is complex, but a common assumption is that it is regulated primarily by two processes (the circadian and the …
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Sensory and Neuromodulatory Entrainment of Foraging States in C. Elegans
<p>Foraging animals dynamically adjust their behavioral patterns over time to optimize feeding in their environment. In the nematode Caenorhabditis. elegans, foraging animals alternate between states of locomotory arousal. I observed that animals in low activity states remain nearby food patches, …
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Behavioral Strategies and Neural Mechanisms of Dynamic Foraging
… action information might change across different behavioral states. This thesis develops techniques for behavioral and neural dissection of cortical contributions to dynamic foraging behavior. By a combination of state-space behavioral modeling, large-scale widefield and single-cell imaging …
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The Flexible Mind of a Worm: the atlas of brain-wide representations of behavior in C. elegans
… explain how individual neurons encode distinct behavioral features. Utilizing neuronal identity information of the recorded neurons, we created the first-ever atlas describing how each defined neuron class in an animal’s brain encodes its behavior. Furthermore, we examined how these encodings …
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Endocrine, transcriptomic and social regulation of division of labor in honey bees
… knowledge about the regulation of task-related behavioral states at the level of the individual and social group by using the honeybee as a model organism. Chapter 1 reviews the extensive literature regarding the contribution of endocrine signaling (including endocrine-mediated transcriptional …
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Transitioning Between Preparatory and Precisely Sequenced Neuronal Activity in Production of a Skilled Motor Behavior
… associated with moving from non-vocal to vocal behavioral states and suggest that precise neural sequences begin and end as part of orchestrated activity across functionally diverse populations of cortical premotor neurons.
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Interneuron networks and cortical dynamics : emulated whisking drives SOM interneurons in the ketamine anesthetized mouse SI neocortex
… by volitional whisking and unknown top-down or behavioral states. Additional chapters in this thesis focus on ancillary work related to computational modeling of neural systems and systems' level perspectives on maturation and disease.
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Serotonin (5-HT) Increases Olfactory Responsiveness in the Tobacco Hawkmoth Manduca sexta
Behavioral states of animals change throughout the day and the brain has developed several mechanisms in order for neural circuits to modify network function in order to produce these states. Neuromodulation allows the animal to alter neural circuits to make them more or less responsive to a given …
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Peptidergic Signaling Controls the Dynamics of Sickness Behavior in Caenorhabditis Elegans
… mechanisms that rule the switch to a sickness behavioral state are an active area of research. One established model for sickness behavior is the interaction between Caenorhabditis elegans and the pathogenic bacteria Pseudomonas aeruginosa PA14. After a few hours of exposure to and infection by …
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Characterization of selected single and convergent stimuli-induced behaviors in larval zebrafish
… Despite the high variance of typical zebrafish behavioral responses, we were able to draw several conclusions. We characterized some optimal stimuli parameters for eliciting consistent responses, from time between stimuli trials to the speed at which a motion stimuli should be moved. We found …
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The Ontogeny of Whistle Production in Infant Atlantic Bottlenose Dolphins (<i>Tursiops truncatus</i>) During the First Thirty Days of Life
… and/or its mother were analyzed, as were the behavioral states of the mother-calf pair during the emission of such vocals. Mother and calf whistle rates are inversely related, with the mother whistling more often in the first ten days of the calf’s life, and the calf whistling most often in …
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DISCREPANCY MEASURES OF ROLE PERCEPTIONS AS SURROGATE MEASURES OF OCCUPATIONAL ROLE STRESS: A THEORETICAL AND CONCEPTUAL ISSUE
… clerks, and concerning job-related affective and behavioral states, such as job satisfaction, involvement, and performance. Four competing theoretical models which examined the relationships between discrepancy measures and the affective and behavioral measures were tested. These models were …
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NEURAL BASIS OF PERFORMANCE EVALUATION IN BIRDS
… and song timing depending on the animal’s behavioral states of singing and non-singing. I also report the first neural recordings from a parrot. Surprisingly, representations of both vocalization and body movements were found in the parrot primary vocal motor cortex. This finding sets up …
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