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Open AccessJournal ArticleDOI

Physiological Dynamics in Demyelinating Diseases: Unraveling Complex Relationships through Computer Modeling

TLDR
This work will discuss how computational modeling applied to questions at different biological levels can help link together disparate observations and decipher complex mechanisms whose solutions are not amenable to simple reductionism.
Abstract
Despite intense research, few treatments are available for most neurological disorders. Demyelinating diseases are no exception. This is perhaps not surprising considering the multifactorial nature of these diseases, which involve complex interactions between immune system cells, glia and neurons. In the case of multiple sclerosis, for example, there is no unanimity among researchers about the cause or even which system or cell type could be ground zero. This situation precludes the development and strategic application of mechanism-based therapies. We will discuss how computational modeling applied to questions at different biological levels can help link together disparate observations and decipher complex mechanisms whose solutions are not amenable to simple reductionism. By making testable predictions and revealing critical gaps in existing knowledge, such models can help direct research and will provide a rigorous framework in which to integrate new data as they are collected. Nowadays, there is no shortage of data; the challenge is to make sense of it all. In that respect, computational modeling is an invaluable tool that could, ultimately, transform how we understand, diagnose, and treat demyelinating diseases.

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Journal ArticleDOI

Four in vivo g‐ratio‐weighted imaging methods: Comparability and repeatability at the group level

TL;DR: The data showed that repeatability and comparability depend largely on the marker for the FVF (NODDI outperformed TFD), and that they were improved by masking, and that the calibration procedure is crucial, for example, calibration to a lower g‐ratio value than the commonly used one.
Journal ArticleDOI

Towards in vivo g-ratio mapping using MRI: Unifying myelin and diffusion imaging.

TL;DR: In this paper, the authors present a review of the most recent developments in the field, while also providing methodological background pertinent to aggregate g-ratio weighted mapping, and discussing pitfalls associated with these approaches.
Posted Content

Towards in vivo g-ratio mapping using MRI: unifying myelin and diffusion imaging

TL;DR: A second review on the topic of g-ratio mapping using MRI with a summary of the most recent developments in the field providing methodological background is published.
Journal ArticleDOI

Iron Oxide Nanoparticles Affects Behaviour and Monoamine Levels in Mice

TL;DR: Over expression of glial fibrillary acidic protein (GFAP) confirms the neuronal damage, suggesting the evidences for behavioural changes, and mitochondrial damage, depleted energy level and decreased ATPase activities were observed in mice exposed to Fe2O3-NPs.
References
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Journal ArticleDOI

Multiple measures of axonal excitability: A new approach in clinical testing

TL;DR: A new method is described that enables several measurements to be made on a motor nerve quickly and reproducibly, with minimal operator intervention, and makes it appropriate for routine clinical use.
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Rapid conduction and the evolution of giant axons and myelinated fibers.

TL;DR: Myelinated nerves, regardless of their source, have in common a multilamellar membrane wrapping, and long myelinated segments interspersed with 'nodal' loci where the myelin terminated and the nerve impulse propagates along the axon by 'saltatory' conduction.
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Intracellular recording from vertebrate myelinated axons: mechanism of the depolarizing afterpotential

TL;DR: Electrophysiological techniques are described which allow intracellular recording from peripheral myelinated axons of lizards and frogs for up to several hours, and show a prominent depolarizing afterpotential in isolated axons and in axons still attached to their peripheral terminals.
Journal ArticleDOI

Molecular dissection of the myelinated axon

TL;DR: The presence of glial cell processes, adjacent to foci of Na+ channels in immature and demyelinated axons, suggests that glial cells participate in the clustering of Na+, and modification of ion channels, pumps, and exchangers in myelinated fibers may provide an important therapeutic approach for a number of neurological disorders.
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