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Temporal association tracts and the breakdown of episodic memory in mild cognitive impairment
2012
Neurology
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Microstructure of uncinate and PHC also correlated with recognition memory, and recognition confidence, in MCI. ...
Three temporal pathways were reconstructed by tractography: fornix, parahippocampal cingulum (PHC), and uncinate fasciculus. ...
ACKNOWLEDGMENT The authors thank the staff of the Llandough Memory Clinic, Cardiff, for their assistance with patient recruitment. ...
doi:10.1212/wnl.0b013e31827689e8
pmid:23175726
pmcid:PMC3542350
fatcat:vnicht64jbce7g4opuwnvydqvu
The relationship between uncinate fasciculus white matter integrity and verbal memory proficiency in children
2014
NeuroReport
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These findings suggest that a greater degree of myelination and cohesiveness of axonal fibers in uncinate fasciculus underlie better verbal memory proficiency in children. ...
The present study sought to test the relationship between fronto-temporal white matter integrity and verbal memory proficiency in children. ...
than individual level tractography. ...
doi:10.1097/wnr.0000000000000204
pmid:24949818
pmcid:PMC4107309
fatcat:klu6gn3akfhxdhnyqwdwg2vp74
Altered white matter integrity in temporal lobe epilepsy: Association with cognitive and clinical profiles
2010
Epilepsia
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Mean FA was positively correlated with delayed memory, in anterior temporal lobe; immediate memory, in mesial temporal lobe. ...
Purpose-Diffusion tensor imaging (DTI) studies have reported substantial white matter abnormalities in patients with temporal lobe epilepsy (TLE). ...
Acknowledgments We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this report is consistent with those guidelines. ...
doi:10.1111/j.1528-1167.2009.02508.x
pmid:20132296
pmcid:PMC2929974
fatcat:agckc3k5dzhg7kpfqywqw6sjcq
Longitudinal changes of structural connectivity in traumatic axonal injury
2011
Neurology
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Conclusions: Diffusion tensor tractography is a valuable tool for identifying structural connectivity changes occurring between the acute and chronic stages of traumatic brain injury and for predicting ...
Importantly, the amount of change in tractography measurements correlated with patients' long-term outcome. ...
ACKNOWLEDGMENT The authors thank the patients and volunteers who participated in this study, the nursing staff at Parkland Health and Hospital System, and the imaging staff, in particular Dr. ...
doi:10.1212/wnl.0b013e31822c61d7
pmid:21813787
pmcid:PMC3162636
fatcat:rsce26h5t5dzfaya4rhkxojlje
White matter disruption at the prodromal stage of Alzheimer's disease: Relationships with hippocampal atrophy and episodic memory performance
2015
NeuroImage: Clinical
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Within the patient group, significant intra-hemispheric correlations were notably found between hippocampal grey matter volume and FA in the uncinate fasciculus, suggesting a relationship between atrophy ...
Performance in various episodic memory tasks was also evaluated in each participant. ...
We thank Patrice Péran for his help with image analysis, and Hélène Gros, Lucette Foltier and Jean-Pierre Désirat for their help with participants3 scanning at the MRI platform of the 'Institut des Sciences ...
doi:10.1016/j.nicl.2015.01.014
pmid:25685715
pmcid:PMC4326466
fatcat:vifuy46qrrh4zg3cooquf22etu
White-matter tract integrity in late-life depression: associations with severity and cognition
2013
Psychological Medicine
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White-matter integrity metrics [fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD) and radial diffusivity (RD)] were calculated in the bilateral cingulum and uncinate fasciculus. ...
Among HC, tract integrity did not correlate with depression scores; however, learning and memory correlated with integrity of the bilateral uncinate fasciculus and bilateral cingulum; executive function ...
We acknowledge the assistance of the Mood Disorders Team for participant screening and assessment.
Declaration of Interest None. ...
doi:10.1017/s0033291713001980
pmid:24041297
pmcid:PMC4310501
fatcat:nnckun2vuffcrndj45mb2j5h7i
Diffusion Tensor Imaging Biomarkers for Traumatic Axonal Injury: Analysis of Three Analytic Methods
2010
Journal of the International Neuropsychological Society
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Histogram analysis of fractional anisotropy (FA) and mean diffusivity showed global WM integrity differences between patients and controls. ...
Novel imaging modalities such as diffusion tensor imaging (DTI) can detect microstructural compromise in white matter (WM) in various clinical populations including TAI. ...
ACKNOWLEDGEMENTS We also thank Ana Arenivas, Carlee Culver, and Matthew Warner for their assistance with data analysis. ...
doi:10.1017/s1355617710001189
pmid:21070694
pmcid:PMC3097093
fatcat:qwt6ysqhuvfuzfmfn4vkx7iwey
Assessing the effects of age on long white matter tracts using diffusion tensor tractography
2009
NeuroImage
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The present study investigated specific predictions of the myelodegeneration hypothesis using diffusion tensor tractography. ...
Specifically, FA in anterior tracts was shown to be primarily associated with executive tasks and FA in posterior tracts mainly associated with visual memory tasks. ...
The authors would like to thank Amber Baptiste-Tarter for the assistance in participant recruitment, Jared Stokes, Vanessa A. ...
doi:10.1016/j.neuroimage.2009.01.068
pmid:19385018
pmcid:PMC2775533
fatcat:qbv34c3l4vbrrlgj5vlyzrspja
Limbic Tract Integrity Contributes to Pattern Separation Performance Across the Lifespan
2014
Cerebral Cortex
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In this study, healthy adults (20-89 years) underwent diffusion tensor imaging and completed the Behavioral Pattern Separation Task-Object Version (BPS-O) and Rey Auditory Verbal Learning Test (RAVLT). ...
; but not mode) was significantly related to pattern separation (measured using BPS-O and RAVLT tasks), but not to recognition memory. ...
We thank Shauna Stark and Samantha Rutledge for their assistance in data collection and Avital Fisher for her help with data quality control. Conflict of Interest: None declared. ...
doi:10.1093/cercor/bhu093
pmid:24825784
pmcid:PMC4553719
fatcat:r4i25vd6fbgdriutq2wxi6zjjy
Influence of the BDNF Genotype on Amygdalo-Prefrontal White Matter Microstructure is Linked to Nonconscious Attention Bias to Threat
2013
Cerebral Cortex
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For 40 normative adults, we reconstructed the entire amygdalo-prefrontal white matter tract (uncinate fasciculus) using diffusion tensor weighted MRI and probabilistic tractography to test the hypothesis ...
We used path analysis to investigate the relationship between brain-derived nerve growth factor genotype, uncinate fasciculus integrity, and attention bias behavior. ...
(c) Scatter plots depicting correlations between attention bias and left uncinate fasciculus fractional anisotropy and (d) axial diffusivity.
Figure 2 . 2 Variability map of the reconstructed UF. ...
doi:10.1093/cercor/bht089
pmid:23585520
fatcat:e4j6rpn5k5c3rmh3uaxdedhu4i
A General Factor of Brain White Matter Integrity Predicts Information Processing Speed in Healthy Older People
2010
Journal of Neuroscience
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Based on diffusion MRI scans of 132 healthy individuals with a narrow age range around 72 years, the integrity of eight major white matter tracts was quantified using probabilistic neighborhood tractography ...
Principal component analyses (PCAs) were conducted on the correlations between the eight tracts, separately for four tract-averaged integrity parameters: fractional anisotropy, mean diffusivity, and radial ...
Furthermore, after statistically controlling for the common tract integrity factor in correlations between the processing speed factor and integrity of the eight individual tracts, only left uncinate fasciculus ...
doi:10.1523/jneurosci.1553-10.2010
pmid:20519531
pmcid:PMC6632368
fatcat:5gztqx5trfdz7lnejyvz2oysye
Atrophy, hypometabolism and white matter abnormalities in semantic dementia tell a coherent story
2011
Brain
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At a less conservative threshold, tensor abnormalities in the semantic dementia group mapped onto the tractographies for the uncinate and arcuate bundles well beyond the rostral temporal lobe; this was ...
Using an unbiased voxel-wise approach known as tract-based spatial statistics, we compared results of whole-brain diffusion tensor imaging-absolute metrics of axial, radial and mean diffusion as well as ...
Acknowledgements We are grateful for the support from our patients and healthy volunteers. ...
doi:10.1093/brain/awr119
pmid:21646331
fatcat:4lhedwug3vgg3g7rv64dlsicya
Frontotemporal Connections in Episodic Memory and Aging: A Diffusion MRI Tractography Study
2011
Journal of Neuroscience
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Diffusion-weighted MRI tractography was used to reconstruct three candidate fasciculi known to link components of memory networks: the fornix, the parahippocampal cingulum, and the uncinate fasciculus. ...
The relationships between aging, microstructure, and episodic memory were assessed for each individual tract. ...
For the uncinate fasciculus, a significant negative correlation between the error ratio in the Paired-Associate Learning task and FA averaged across hemispheres was found (Fig. 5, Table 3 ). ...
doi:10.1523/jneurosci.2317-11.2011
pmid:21917806
pmcid:PMC6623273
fatcat:embbxlgptnfw7c76mjnwmxu32y
MR Diffusion Tensor Imaging: A Window into White Matter Integrity of the Working Brain
2010
Neuropsychology Review
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Here we present an overview of the principles of diffusion tensor imaging (DTI) and its contribution to progress in our current understanding of normal and pathological brain function. ...
The advent of in vivo diffusion tensor imaging, which allows quantitative characterization of white matter fiber integrity in health and disease, has served to strengthen Geschwind's proposal. ...
Acknowledgments All authors were involved in drafting the article or revising it critically, and they read and approved the final version of the manuscript. ...
doi:10.1007/s11065-010-9129-7
pmid:20422451
pmcid:PMC2910550
fatcat:pkx5s4lrmngwxliz5vujlptcna
Prefrontal cortex white matter tracts in prodromal Huntington disease
2015
Human Brain Mapping
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Within each of these tracts, tensor scalars for fractional anisotropy, mean diffusivity, radial diffusivity, and axial diffusivity coefficients were calculated. ...
The primary objective of this research was to conduct a large-scale analysis using multisite diffusion-weighted imaging (DWI) tractography data to quantify diffusivity properties along major prefrontal ...
ACKNOWLEDGMENTS The authors would like to acknowledge Norman Williams, David Welch, Jessica Forbes, Eric Axelson, Jacquie Marietta, Kathryn Jones, and Daniel Langstraat for their assistance in completing ...
doi:10.1002/hbm.22835
pmid:26179962
pmcid:PMC4583330
fatcat:tzhr6yfd4nbazcwtd3bd7etv6y
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