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 794 for “"dorsal"”.
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Dorsal stream : from algorithm to neuroscience
The dorsal stream in the primate visual cortex is involved in the perception of motion and the recognition of actions. The two topics, motion processing in the brain, and action recognition in videos, have been developed independently in the field of neuroscience and computer vision. We present a …
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Regulation of dorsal raphe serotonergic neurons by histamine
… structures. Serotonergic neurons located in the dorsal raphe nucleus (DRN) are currently accepted to be wake-promoting however their precise regulation by other neurotransmitter systems during the sleep-wake cycle is currently unknown. The main aim of this study was to utilise in vitro and in …
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Dorsal wing-flip timing in tethered flying locusts
Insects provide a unique opportunity to study unsteady aerodynamic mechanisms during flight. One of these mechanisms, rotational lift, has been shown to be important for Drosophila in flight and it is an open question as to whether rotational lift is important for other insects. In this study, we …
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Dorsal knuckle crease pattern: utility for forensic human identification
… aim of this project was to determine whether the dorsal knuckle crease pattern may be of value within the field of forensic human identification. This was examined through three phases of research. The primary phase of research attempted to classify the pattern of the skin creases overlying the …
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Dorsal-Ventral Patterning in the Mud Snail, Ilyanassa obsoleta
… mechanisms involved in the establishment of the dorsal-ventral axis in the mud snail, Ilyanassa obsoleta. Ilyanassa and other spiralians utilize an embryonic organizer to induce dorsal identity, and thus establish the bilateral axis. The D macromere embryonic organizer in Ilyanassa is specified …
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Control of intertemporal choice by dorsal raphe serotonergic neurons
… future rewards is critical for survival. The dorsal raphe serotonergic neurons have been long implicated in the control of temporal discounting of reward [3] [4], but it is not clear whether their activities in fact direct the decision making process. In this thesis, I designed a cued …
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Encoding of periodic skin stimuli by spinal dorsal horn neurons
… however, have not extended to the spinal dorsal horn, which is known to process low threshold mechanoreceptive input. The studies presented here were designed to assess the possible role of the dorsal horn in the encoding of vibrotactile pitch. To accomplish this task, dorsal horn single …
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Dorsal Cochlear Nucleus Output Neurons in Young and Aged Rats
… a better understanding of age-related changes in dorsal cochlear nucleus (DCN) physiology. DCN was chosen because it receives direct input from the auditory nerve and much is known about its neuronal morphology, physiology and circuitry. In young animals, DCN output neurons, fusiform cells, …
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Dorsal hand feature analysis: an aid to forensic human identification
The analysis of anatomical features on the dorsum of the hand has been utilised in forensic investigations for ascertaining anatomical similarities and differences between suspect and offender images, since 2007. This approach was introduced and developed by the team at CAHId, and has primarily …
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Electrophysiological correlates of motor plans and graspability via dorsal/ventral interactions
… to mediate vision-for-perception, while the dorsal pathway, originating in early visual cortex and terminating in the parietal lobe, is thought to mediate vision-for-action. While serving as a fertile and influential theoretical framework, a growing body of evidence suggests these processing …
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Examining cholinergic fuction in the ventral tegmental area and dorsal hippocampus
… from the pedunculopontine tegmental and laterodorsal tegmental nuclei (PPTg, LDTg). Previous studies have shown that selective bilateral cholinergic lesions of the posterior PPTg or LDTg can be achieved by directly infusing diphtheria-urotensin II toxin (Dtx-UII) into either region. This thesis …
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Roles of the Dorsal and Ventral Visual Streams In Fluent Reading
… (e.g., Eden et al., 1996), specifically in the dorsal visual stream of the brain, which processes motion. It is unclear, however, whether or not there is a significant relationship between visual processing in the dorsal stream and reading ability in typically developing children. Furthermore, …
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Three Dimensional Organisation of the Adult Mouse dorsal Lateral Geniculate Nucleus
The dLGN (dorsal Lateral Geniculate Nucleus) is the gateway to cortical processing for visual information encoded by RGCs (retinal ganglion cells). Owing to advances in genetic manipulations, the mouse is increasingly the model system of choice for understanding the function and organisation of the …
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Antinociceptive actions of descending catecholaminergic tracts on dorsal horn somatosensory neurones
… responses of multireceptive somatosensory dorsal horn neurones, whilst non-nociceptive responses, spontaneous activity and activity evoked by an ionophoretically-applied excitatory amino acid, DL-homocysteic acid were unaffected. Many of the neurones tested had long ascending projections, …
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Mathematical quantification and statistical analysis of bombus (hymenoptera:apidae) dorsal color patterns
… of developmental elements. The elements are dorsal regions that together comprise a model for the spatial arrangement and development of bumble bee color patterns. Morphological boundaries between metasomal tergites, thoracic lobes, and cuticular folds form the boundaries of these elements. …
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Molecular mechanisms of regeneration initiation and dorsal-ventral patterning in planarians
Regeneration is widespread among animals, yet very little is known about the molecular mechanisms that govern regenerative processes. Planarians have emerged in recent years as a powerful model for studying regeneration and are capable of whole-body regeneration following a limitless variety of …
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Circuit Development in the Dorsal Lateral Geniculate Nucleus (dLGN) of the Mouse.
… used and best understood sensory systems and the dorsal lateral geniculate nucleus (dLGN) of the mouse has emerged as a model for investigating the cellular and molecular mechanisms underlying the development and activity-dependent refinement of sensory connections. Thalamic organization is highly …
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