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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

Conduction velocity and spike configuration in myelinated fibres: computed dependence on internode distance.

TL;DR: In order to gain insight into impulse propagation in myelinated and remyelinated fibres with short internodal lengths, the present study examines the conduction velocity and spike configuration for a wide range of internodAL lengths.
Journal ArticleDOI

Heterogeneous distribution of fast and slow potassium channels in myelinated rat nerve fibres.

J Röper, +1 more
TL;DR: The results suggest the existence of at least two distinct types of K+ channels in the intact node of Ranvier, one with slow and another with fast gating kinetics, in the ratio 4:1.
Journal ArticleDOI

Interactions between oligodendrocytes and microglia. A major role for complement and tumour necrosis factor in oligodendrocyte adherence and killing.

TL;DR: Results suggest that activated microglia in the presence of complement are sufficient to kill and phagocytose the oligodendrocyte-myelin complex in vitro.
Journal ArticleDOI

Changes in excitability of human motor axons underlying post-ischaemic fasciculations: evidence for two stable states.

TL;DR: It is suggested that post‐ischaemic motor fasciculations in man also involve transitions between two equilibrium states, occurring in axons with high extracellular potassium and high electrogenic pump activity.
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