Letteratura scientifica selezionata sul tema "Myelinated neurofibrils"

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Tesi sul tema "Myelinated neurofibrils"

1

Cai, Zhao. "Accuracy of sampling methods in morphometric studies of the sural nerve in man /". Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09MS.M/09ms.mc133.pdf.

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Cai, Zhao. "A technique for examining longitudinal and cross sections of teased nerve fibres and its application to human and experimental neuropathy". Title page, contents and summary only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phc1326.pdf.

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Abstract (sommario):
Includes bibliographical references (leaves 194-225) A new method is described that enables longitudinal and cross sections of an individual nerve fibre to be cut at multiple specified sites along the fibre by use of an unique marker system. The method is particularly useful for the correlative study of myelin-axon relationships
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3

Cheung, Vinci. "Structural white matter abnormalities in never-medicated patients with first-episode schizophrenia : a diffusion tensor imaging study /". View the Table of Contents & Abstract, 2008. http://sunzi.lib.hku.hk/hkuto/record/B39716375.

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Kieselbach, Rebecca. "A numerically stable model for simulating high frequency conduction block in nerve fiber". Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41233.

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Abstract (sommario):
Previous studies performed on myelinated nerve fibers have shown that a high frequency alternating current stimulus can block impulse conduction. The current threshold at which block occurs increases as the blocking frequency increases. Cable models based on the Hodgkin-Huxley model are consistent with these results. Recent experimental studies on unmyelinated nerve have shown that at higher frequencies, the block threshold decreases. When the block threshold is plotted as a function of frequency the resulting graph is distinctly nonmonotonic. Currently, all published models do not explain this behavior and the physiological mechanisms that create it are unknown. This difference in myelinated vs. unmyelinated block thresholds at high frequencies could have numerous clinical applications, such as chronic pain management. A large body of literature has shown that the specific capacitance of biological tissue decreases at frequencies in the kHz range or higher. Prior research has shown that introducing a frequency-dependent capacitance (FDC) to the Hodgkin-Huxley model will attenuate the block threshold at higher frequencies, but not to the extent that was seen in the experiments. This model was limited by the methods used to solve its higher order partial differential equation. The purpose of this thesis project is to develop a numerically stable method of incorporating the FDC into the model and to examine its effect on block threshold. The final, modified model will also be compared to the original model to ensure that the fundamental characteristics of action potential propagation remain unchanged.
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Cheung, Vinci, e 張穎思. "Structural white matter abnormalities in never-medicated patients withfirst-episode schizophrenia: a diffusiontensor imaging study". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39793734.

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Rose, Kathryn Ailsa. "Conduction in myelinated and demyelinated single optic axons". Phd thesis, 1995. http://hdl.handle.net/1885/143805.

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Cai, Zhao. "A technique for examining longitudinal and cross sections of teased nerve fibres and its application to human and experimental neuropathy / a thesis submitted by Zhao Cai". Thesis, 2002. http://hdl.handle.net/2440/21761.

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Abstract (sommario):
Includes bibliographical references (leaves 194-225)
ix, 225, vii leaves : ill. (some col.) ; 30 cm.
A new method is described that enables longitudinal and cross sections of an individual nerve fibre to be cut at multiple specified sites along the fibre by use of an unique marker system. The method is particularly useful for the correlative study of myelin-axon relationships
Thesis (Ph.D.)--University of Adelaide, Dept. of Medicine, 2002
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Kundu, Madan Gopal. "Advanced Modeling of Longitudinal Spectroscopy Data". Thesis, 2014. http://hdl.handle.net/1805/5454.

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Indiana University-Purdue University Indianapolis (IUPUI)
Magnetic resonance (MR) spectroscopy is a neuroimaging technique. It is widely used to quantify the concentration of important metabolites in a brain tissue. Imbalance in concentration of brain metabolites has been found to be associated with development of neurological impairment. There has been increasing trend of using MR spectroscopy as a diagnosis tool for neurological disorders. We established statistical methodology to analyze data obtained from the MR spectroscopy in the context of the HIV associated neurological disorder. First, we have developed novel methodology to study the association of marker of neurological disorder with MR spectrum from brain and how this association evolves with time. The entire problem fits into the framework of scalar-on-function regression model with individual spectrum being the functional predictor. We have extended one of the existing cross-sectional scalar-on-function regression techniques to longitudinal set-up. Advantage of proposed method includes: 1) ability to model flexible time-varying association between response and functional predictor and (2) ability to incorporate prior information. Second part of research attempts to study the influence of the clinical and demographic factors on the progression of brain metabolites over time. In order to understand the influence of these factors in fully non-parametric way, we proposed LongCART algorithm to construct regression tree with longitudinal data. Such a regression tree helps to identify smaller subpopulations (characterized by baseline factors) with differential longitudinal profile and hence helps us to identify influence of baseline factors. Advantage of LongCART algorithm includes: (1) it maintains of type-I error in determining best split, (2) substantially reduces computation time and (2) applicable even observations are taken at subject-specific time-points. Finally, we carried out an in-depth analysis of longitudinal changes in the brain metabolite concentrations in three brain regions, namely, white matter, gray matter and basal ganglia in chronically infected HIV patients enrolled in HIV Neuroimaging Consortium study. We studied the influence of important baseline factors (clinical and demographic) on these longitudinal profiles of brain metabolites using LongCART algorithm in order to identify subgroup of patients at higher risk of neurological impairment.
Partial research support was provided by the National Institutes of Health grants U01-MH083545, R01-CA126205 and U01-CA086368
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Libri sul tema "Myelinated neurofibrils"

1

S, Wakana, e Van Zijl, P. C. M., a cura di. MRI atlas of human white matter. Amsterdam, The Netherlands: Elsevier, 2004.

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2

L, Ulmer John, a cura di. White matter in cognitive neuroscience: Advances in diffusion tensor imaging and its applications. New York: New York Academy of Sciences, 2005.

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3

MR imaging in white matter diseases of the brain and spinal cord. Berlin: Springer, 2005.

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4

Myelinated Fibers And Saltatory Conduction In The Shrimp The Fastest Impulse Conduction In The Animal Kingdom. Springer Verlag, Japan, 2012.

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5

Schmahmann, Jeremy D., e Deepak N. Pandya. Fiber Pathways of the Brain. Oxford University Press, Incorporated, 2009.

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Schmahmann, Jeremy D., e Deepak N. Pandya. Fiber Pathways of the Brain. Oxford University Press, 2009.

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Sartor, K., Massimo Filippi, Nicola de Stefano, Vincent Dousset e Joseph C. McGowan. MR Imaging in White Matter Diseases of the Brain and Spinal Cord. Springer London, Limited, 2005.

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8

Mri Atlas Of Human White Matter. Academic Press, 2010.

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9

Moseley, Michael, John Gabrieli e Lawrence Parsons. White Matter in Cognitive Neuroscience: Advances in Diffusion Tensor Imaging and Its Applications (Annals of the New York Academy of Sciences). Blackwell Publishing Limited, 2005.

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10

Cooley's Anemia Symposium 2005 Lake Buen e Elliott P. Vichinsky. White Matter in Cognitive Neurosciences (Annals of the New York Academy of Sciences). New York Academy of Sciences, 2006.

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