Results 21 to 30 of about 932,523 (265)

White matter microstructure from nonparametric axon diameter distribution mapping [PDF]

NeuroImage, 2016
Uri Nevo, Dan Benjamini, Peter J Basser
exaly   +2 more sources

Revisiting the interpretation of axon diameter mapping using higher-order signal representations. [PDF]

Imaging Neurosci (Camb)
Diffusion-weighted Magnetic Resonance Imaging (dMRI) has emerged as an imaging modality of interest to measure axon diameters noninvasively. The previously observed b-½ power law scaling suggests that high b-value dMRI signals originate from water ...
Karat BG, Wren-Jarvis J, Raven EP, Khan AR, Jones DK, Palombo M, Veraart J.   +6 more
europepmc   +2 more sources

Scan-rescan repeatability of axonal imaging metrics using high-gradient diffusion MRI and statistical implications for study design

NeuroImage, 2021
Axon diameter mapping using diffusion MRI in the living human brain has attracted growing interests with the increasing availability of high gradient strength MRI systems.
Qiuyun Fan, Maya N. Polackal, Qiyuan Tian, Chanon Ngamsombat, Aapo Nummenmaa, Thomas Witzel, Eric C. Klawiter, Susie Y. Huang   +7 more
doaj   +1 more source

Fast and simplified mapping of mean axon diameter using temporal diffusion spectroscopy [PDF]

NMR in Biomedicine, 2016
Hakmook Kang, Junzhong Xu, Xiaoyu Jiang
exaly   +2 more sources

Experience-related reductions of myelin and axon diameter in adulthood. [PDF]

J Neurophysiol, 2018
The production of new myelin has been highlighted as an underappreciated mechanism of brain plasticity, but whether plastic decreases in myelin also happen in the adult brain has been largely unexplored. Recently, Sinclair et al. (Sinclair JS, Fischl MJ, Alexandrova O, Heß M, Grothe B, Leibold C, and Kopp-Scheinpflug C. J Neurosci 37: 8239–8255, 2017)
Lazari A, Koudelka S, Sampaio-Baptista C.   +2 more
europepmc   +4 more sources

Evidence That ITPR2-Mediated Intracellular Calcium Release in Oligodendrocytes Regulates the Development of Carbonic Anhydrase II + Type I/II Oligodendrocytes and the Sizes of Myelin Fibers

Frontiers in Cellular Neuroscience, 2021
Myelination of neuronal axons in the central nervous system (CNS) by oligodendrocytes (OLs) enables rapid saltatory conductance and axonal integrity, which are crucial for normal brain functioning.
Ruyi Mei, Ruyi Mei, Linyu Huang, Mengyuan Wu, Chunxia Jiang, Chunxia Jiang, Aifen Yang, Huaping Tao, Kang Zheng, Junlin Yang, Wanhua Shen, Xianjun Chen, Xiaofeng Zhao, Mengsheng Qiu, Mengsheng Qiu   +14 more
doaj   +1 more source

Axon diameter and intra-axonal volume fraction of the corticospinal tract in idiopathic normal pressure hydrocephalus measured by q-space imaging. [PDF]

PLoS ONE, 2014
PURPOSE: Previous studies suggest that compression and stretching of the corticospinal tract (CST) potentially cause treatable gait disturbance in patients with idiopathic normal pressure hydrocephalus (iNPH).
Kouhei Kamiya, Masaaki Hori, Masakazu Miyajima, Madoka Nakajima, Yuriko Suzuki, Koji Kamagata, Michimasa Suzuki, Hajime Arai, Kuni Ohtomo, Shigeki Aoki   +9 more
doaj   +1 more source

The influence of axonal beading and undulation on axonal diameter mapping

, 2023
Abstract We consider the effect of non-cylindrical axonal shape on axonal diameter mapping with diffusion MRI. Practical sensitivity to axon diameter is attained at strong diffusion weightings b , where the deviation from the
Hong-Hsi Lee, Qiyuan Tian, Maxina Sheft, Ricardo Coronado-Leija, Gabriel Ramos-Llorden, Ali Abdollahzadeh, Els Fieremans, Dmitry S. Novikov, Susie Y. Huang   +8 more
openaire   +2 more sources

Automated pipeline for nerve fiber selection and g-ratio calculation in optical microscopy: exploring staining protocol variations

Frontiers in Neuroanatomy, 2023
G-ratio is crucial for understanding the nervous system’s health and function as it measures the relative myelin thickness around an axon. However, manual measurement is biased and variable, emphasizing the need for an automated and standardized ...
Bart R. Thomson, Louise Françoise Martin, Paul L. Schmidle, Hannah Schlierbach, Anne Schänzer, Henning Richter   +5 more
doaj   +1 more source

Does powder averaging remove dispersion bias in diffusion MRI diameter estimates within real 3D axonal architectures?

NeuroImage, 2022
Noninvasive estimation of axon diameter with diffusion MRI holds the potential to investigate the dynamic properties of the brain network and pathology of neurodegenerative diseases. Recent studies use powder averaging to account for complex white matter
Mariam Andersson, Marco Pizzolato, Hans Martin Kjer, Katrine Forum Skodborg, Henrik Lundell, Tim B. Dyrby   +5 more
doaj   +1 more source