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Wallerian-Like Degeneration After Ischemic Stroke Revealed by Diffusion - Weighted Imaging
2007
Canadian Journal of Neurological Sciences
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Magnetic resonance imaging (MRI) of the brain done on the next day revealed evidence of acute ischemic lesions in the right MCA and anterior cerebral artery territory on diffusion-weighted imaging (DWI ...
[Figure 1] A repeat MRI performed 13 days after ictus showed hyperintense signal on DWI in the right cerebral peduncle which was hypointense on apparent diffusion coefficient (ADC) map suggestive of Wallerian-like ...
The availability of DWI and diffusion tensor-imaging (DTI) has facilitated early detection of Wallerian-like degeneration, within 2-14 days after ischemic stroke. 2 Wallerian-like degeneration develops ...
doi:10.1017/s0317167100006120
fatcat:4rdecwq3ozcnrd6665hkzdb22u
Observing the time course of early long pyramidal tract Wallerian degeneration after acute ischemic stroke: a case report
2021
Rinsho Shinkeigaku
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On the other hand, brain MRI FLAIR images detected the lesions clearly day 44. Also, diffusion tensor tractography detects fewer left cerebral pyramidal tracts. ...
Brain MRI diffusion-weighted imaging (DWI) 4 days after admission detected high signal intensity lesions in the left pyramidal tract from the midbrain cerebral peduncle to the lower pons, indicating early ...
MR imaging of Wallerian degeneration in the human brain stem after ictus. Castillo M, Mukherji SK. ...
doi:10.5692/clinicalneurol.cn-001588
pmid:34148937
fatcat:3b5zbtresffp7hcxi3ztnrwbfm
Identification of Nerve Fibers Using Diffusion Tensor Imaging and its Application for Rehabilitation
拡散テンソル画像を用いた神経線維の描出とリハビリテーションへの応用
2014
Rigakuryoho Kagaku
拡散テンソル画像を用いた神経線維の描出とリハビリテーションへの応用
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Recently, we used diffusion tensor imaging (DTI) and diffusion tensor tractography (DTT) for visualization and quantitative evaluation of nerve fibers. ...
DTT of the corticospinal tract is useful as a prognostic tool for assessing the motor functions of patients with stroke. ...
.: Wallerian degeneration in the corticospinal tract evaluated by diffusion tensor imaging correlates with motor deficit 30 days after middle cerebral artery ischemic stroke. ...
doi:10.1589/rika.29.841
fatcat:syxlobzd5vamrd7wtxkdiwaxha
Progressive Wallerian Degeneration of the Corpus Callosal Splenium in a Patient with Alexia without Agraphia: Advanced MR Findings
2014
The Neuroradiology Journal
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The corpus callosal splenium is an uncommon location for Wallerian degeneration (WD), which may be mistaken for new pathology on magnetic resonance imaging (MRI). ...
We address how magnetic resonance spectroscopy, perfusion MRI, diffusion tensor MRI, and serial imaging were utilized in establishing the correct diagnosis. ...
Diffusion tensor imaging detects early Wallerian degeneration of the pyramidal tract after ischemic stroke. ...
doi:10.15274/nrj-2014-10097
pmid:25489886
pmcid:PMC4291795
fatcat:ce4uwl26vnauthlvnbcixww7fy
Effect of Acupuncture Therapy for Postponing Wallerian Degeneration of Cerebral Infarction as Shown by Diffusion Tensor Imaging
2012
Journal of Alternative and Complementary Medicine
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Serial diffusion tensor imaging (DTI), fluid-attenuated inversion recovery (FLAIR), and T2weighted imaging (T 2 WI) scans were performed on all patients and the results were evaluated using the National ...
Results: (1) The ADC value of infarction lesions decreased at stroke onset; then, a significant elevation was observed after the acute stage, and a significant reduction in FA values was observed from ...
Acknowledgments This work was supported by the grants from the Department of Science and Technology of Shenzhen City, China (No: 200902163). ...
doi:10.1089/acm.2011.0493
pmid:22950816
pmcid:PMC3513977
fatcat:lt7gs2a2y5epzjmoidfm7qdw3m
Secondary Neurodegeneration in Remote Regions After Focal Cerebral Infarction: A New Target for Stroke Management?
2012
Stroke
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Sources of Funding
Disclosures None. ...
in the pyramidal tract is an early predictor of motor recovery after cerebral infarction. 9 -11 In 2 longitudinal diffusion tensor imaging studies, a significant increase in mean diffusivity was noted ...
This abnormal spot appeared after an average of 14.3 days after the stroke onset and then became less intense 3 months after onset. 19 Wallerian degeneration of the pyramidal tract displays an evolution ...
doi:10.1161/strokeaha.111.632448
pmid:22492515
fatcat:b4w6hjnnljfzhdjlsmj5et2w3m
Prediction of motor outcome in ischemic stroke involving the pyramidal tract using diffusion tensor imaging
2012
The Egyptian Journal of Radiology and Nuclear Medicine
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and purpose: Early evaluation of the pyramidal tract is a prerequisite in patients with ischemic stroke in order to decide the optimal treatment or to assess appropriate rehabilitation. ...
The aim of this study was to predict motor outcome using quantitative and qualitative diffusion tensor parameters and their correlations with severity of stroke as defined by the National Institutes of ...
Diagnosing wallerian degeneration requires at least 4-5 weeks after the stroke when using T2 weighted images, the apparent diffusion coefficient, or other conventional MR imaging parameters, whereas the ...
doi:10.1016/j.ejrnm.2011.11.004
fatcat:ud7t3f4zz5empepeq7xcabzxuq
Natural History and Prognostic Value of Corticospinal Tract Wallerian Degeneration in Intracerebral Hemorrhage
2013
Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease
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Background--The purpose of this study was to define the incidence, imaging characteristics, natural history, and prognostic implication of corticospinal tract Wallerian degeneration (CST-WD) in spontaneous ...
MRIs were analyzed by independent raters for the presence and topographical distribution of CST-WD on diffusion-weighted imaging (DWI). ...
Sources of Funding
Disclosures None. ...
doi:10.1161/jaha.113.000090
pmid:23913508
pmcid:PMC3828779
fatcat:jrzks3kv2zcetaxkmtuf6ez3ri
Acute Corticospinal Tract Wallerian Degeneration Is Associated With Stroke Outcome
2010
Stroke
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FRCPC; for the MONITOR and VISION study groups Background and Purpose-In children with stroke, poor motor outcome is associated with early Wallerian degeneration of the corticospinal tract that is seen ...
In this study we test the hypothesis that early diffusion changes also occur in the corticospinal tract (CST) of adults after stroke and that these lesions are associated with poor outcome. ...
Acknowledgments The authors thank the Seaman Family MR Research Center, Calgary, Canada, for developing the required software. ...
doi:10.1161/strokeaha.109.573287
pmid:20203322
fatcat:prtgezd76nh2jfnfvj3nl5gy7e
What drives progressive motor deficits in patients with acute pontine infarction?
2015
Neural Regeneration Research
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for the worsening of neurological symptoms. ...
However, the factors that affect the progression of clinical motor weakness are largely unknown. ...
Wallerian degeneration of the corticospinal and pyramidal tracts after motor pathway ischemic stroke can be characterized by diffusion tensor imaging. ...
doi:10.4103/1673-5374.153703
pmid:25878603
pmcid:PMC4396117
fatcat:inus3vnqrnhy5nzy42s5vz2tkm
Prediction of Motor Function Outcome after Intracerebral Hemorrhage Using Fractional Anisotropy Calculated from Diffusion Tensor Imaging
2012
Cerebrovascular Diseases
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Conclusion: The main finding of this study was that the FA values of the cerebral peduncle on the pathological side in patients with ICH on day 3 could predict the motor function outcome on day 90. ...
Receiver operating characteristic curve analysis showed that the FA value on day 3 could predict motor function outcome with a sensitivity of 100% and a specificity of 77.8% at an FA value of 0.7 on day ...
of pyramidal tract degeneration within the first 2 weeks after stroke, which are not yet detectable by conventional MR imaging [26] . ...
doi:10.1159/000338904
pmid:22688137
fatcat:f44jpubumrdffizb47hkifilyq
Diffusion anisotropy of the internal capsule and the corona radiata in association with stroke and tumors as measured by diffusion-weighted MR imaging
2001
American Journal of Neuroradiology
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Diffusion-weighted MR images have enabled measurement of directionality of diffusion (anisotropy) in white matter. ...
To investigate differences in the anisotropy for various types of pathologic findings and the association between the anisotropy of tracts and neurologic dysfunction, we compared the anisotropy of the ...
in the pyramidal tract within 14 days after stroke. ...
pmid:11237966
pmcid:PMC7976848
fatcat:7bfi2764frahvpk325fl6adeoa
Ex Vivo Diffusion Tensor Imaging and Neuropathological Correlation in a Murine Model of Hypoxia–Ischemia-Induced Thrombotic Stroke
2010
Journal of Cerebral Blood Flow and Metabolism
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Diffusion tensor imaging (DTI) is a powerful method to visualize white matter, but its use in patients with acute stroke remains limited because of the lack of corresponding histologic information. ...
The gray matter of the hippocampus also exhibited a high level of diffusion anisotropy, and its reduction signified dendritic degeneration. ...
Disclosure/conflict of interest The authors declare no conflict of interest. ...
doi:10.1038/jcbfm.2010.212
pmid:21139628
pmcid:PMC3070976
fatcat:v3ih4oyrqffnfdlurv5gj2rxyy
Cellular correlates of longitudinal diffusion tensor imaging of axonal degeneration following hypoxic–ischemic cerebral infarction in neonatal rats
2014
NeuroImage: Clinical
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Diffusion tensor imaging (DTI) is widely used to investigate axonal injury but the cellular correlates of many of the degenerative changes remain speculative. ...
Ischemically damaged brain can be accompanied by secondary degeneration of associated axonal connections e.g. Wallerian degeneration. ...
Acknowledgements The authors thank J. Hodge for informative exchanges regarding her methods of DTI analysis of the corticospinal tract. ...
doi:10.1016/j.nicl.2014.08.003
pmid:25379414
pmcid:PMC4215526
fatcat:elgia3kfzjc47lxsnelq6pww7m
The Temporal Dynamics of Poststroke Neuroinflammation: A Longitudinal Diffusion Tensor Imaging-Guided PET Study with 11C-PK11195 in Acute Subcortical Stroke
2010
Journal of Nuclear Medicine
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tract (PT) damage using diffusion tensor imaging (DTI). ...
We used 11 C-PK11195 PET to image AMG in vivo after stroke in humans in a prospective longitudinal study to investigate the temporal dynamics of AMG and relate local and remote AMG activity to pyramidal ...
ACKNOWLEDGMENTS We thank Sharon Shapiro, Catherine Forbes, and the stroke team of the SMBD Jewish General Hospital for their enthusiastic support, and we thank the Cyclotron Unit of the McConnell Brain ...
doi:10.2967/jnumed.110.076612
pmid:20720039
fatcat:xzgp4ezyxvg45ba75c65dszqde
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