Abstract:
:One goal of in vivo neuroimaging is the detection of neurodegenerative processes and anatomical reorganizations after spinal cord (SC) injury. Non-invasive examination of white matter fibers in the living SC can be conducted using magnetic resonance diffusion-weighted imaging. However, this technique is challenging at the spinal level due to the small cross-sectional size of the cord and the presence of physiological motion and susceptibility artifacts. In this study, we acquired in vivo high angular resolution diffusion imaging (HARDI) data at 3T in cats submitted to partial SC injury. Cats were imaged before, 3 and 21 days after injury. Spatial resolution was enhanced to 1.5 × 1.5 × 1 mm(3) using super-resolution technique and distortions were corrected using the reversed gradient method. Tractography-derived regions of interest were generated in the dorsal, ventral, right and left quadrants, to evaluate diffusion tensor imaging (DTI) and Q-Ball imaging metrics with regards to their sensitivity in detecting primary and secondary lesions. A three-way ANOVA tested the effect of session (intact, D3, D21), cross-sectional region (left, right, dorsal and ventral) and rostrocaudal location. Significant effect of session was found for FA (P<0.001), GFA (P<0.05) and radial diffusivity (P<0.001). Post-hoc paired T-test corrected for multiple comparisons showed significant changes at the lesion epicenter (P<0.005). More interestingly, significant changes were also found several centimeters from the lesion epicenter at both 3 and 21 days. This decrease was specific to the type of fibers, i.e., rostrally to the lesion on the dorsal aspect of the cord and caudally to the lesion ipsilaterally, suggesting the detection of Wallerian degeneration.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Cohen-Adad J,Leblond H,Delivet-Mongrain H,Martinez M,Benali H,Rossignol Sdoi
10.1016/j.neuroimage.2011.04.068subject
Has Abstractpub_date
2011-08-01 00:00:00pages
1068-76issue
3eissn
1053-8119issn
1095-9572pii
S1053-8119(11)00485-Xjournal_volume
57pub_type
杂志文章相关文献
NEUROIMAGE文献大全abstract::Characterization and quantification of magnetic resonance perfusion images is important for clinical interpretation, though this calls for a reproducible and accurate method of analysis and a robust healthy reference. The few studies which have examined the perfusion of the healthy brain using dynamic susceptibility c...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2011.03.027
更新日期:2011-06-01 00:00:00
abstract::The purpose of this paper is to compare volume- and boundary-based morphometry methods by applying them in the statistical analysis of 2-D shapes. The methods discussed in the first category include voxel-, deformation-, and tensor-based morphometry. The active shape model is demonstrated as an example of the second c...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2008.12.068
更新日期:2009-04-15 00:00:00
abstract::The body underlies our sense of self, emotion, and agency. Signals arising from the skin convey warmth, social touch, and the physical characteristics of external stimuli. Surprising or unexpected tactile sensations can herald events of motivational salience, including imminent threats (e.g., an insect bite) and hedon...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2015.11.030
更新日期:2016-02-15 00:00:00
abstract::Mu, beta, and gamma rhythms increase and decrease in amplitude during movement. This event-related synchronization (ERS) and desynchronization (ERD) can be readily recorded non-invasively using magneto- and electro-encephalography (M/EEG). In addition, event-related potentials and fields (i.e., evoked responses) can b...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2019.02.065
更新日期:2019-06-01 00:00:00
abstract::An important aspect of hearing is the degree to which listeners have to deploy effort to understand speech. One promising measure of listening effort is task-evoked pupil dilation. Here, we use functional magnetic resonance imaging (fMRI) to identify the neural correlates of pupil dilation during comprehension of degr...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2014.06.069
更新日期:2014-11-01 00:00:00
abstract::The present study provides an account of a sensitive and rapid experimental approach for MRI visualization and analysis of spinal cord (SC) laminar activity in normal and injured animals. This approach is based upon neuronal activity-dependant manganese (Mn) uptake after focal SC injection of MnCl(2), and subsequent e...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2008.01.050
更新日期:2008-05-01 00:00:00
abstract::Experience-dependent modulation of the visual evoked potential (VEP) is a promising proxy measure of synaptic plasticity in the cerebral cortex. However, existing studies are limited by small to moderate sample sizes as well as by considerable variability in how VEP modulation is quantified. In the present study, we u...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2020.117302
更新日期:2020-12-01 00:00:00
abstract:AIM:In order to relate brain structural abnormalities to clinical features of Angelman Syndrome (AS), we determined the locations of abnormal regional white matter architecture in AS children using a sensitive and objective whole brain approach to analyze diffusion tensor imaging (DTI) color-coded orientation maps. ME...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2011.07.067
更新日期:2012-01-02 00:00:00
abstract::Interactive paradigms inducing reactive aggression are absent in the brain mapping literature. We used a competitive reaction time task to investigate brain regions involved in social interaction and reactive aggression in sixteen healthy male subjects with fMRI. Subjects were provoked by increasingly aversive stimuli...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2006.09.028
更新日期:2007-01-01 00:00:00
abstract:PURPOSE:To examine the extent of genetic damage, assessed from deoxyribonucleic acid (DNA) double-strand breaks (DSBs) and micronuclei (MN) in peripheral blood mononuclear cells obtained from individuals repeatedly exposed to 7T Magnetic Resonance Imaging (MRI). MATERIALS AND METHODS:The study protocol was approved by...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2016.03.023
更新日期:2016-06-01 00:00:00
abstract::Transcranial direct current stimulation (tDCS) can up- and down-regulate cortical excitability depending on current direction, however our abilities to measure brain-tissue effects of the stimulation and its after-effects have been limited so far. We used regional cerebral blood flow (rCBF), a surrogate measure of bra...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2011.06.018
更新日期:2011-09-01 00:00:00
abstract::Development of working memory (WM) aptitude parallels structural changes in the frontal-parietal association cortices important for performance within this cognitive domain. The cerebellum has been proposed to function in support of the postulated phonological loop component of verbal WM, and along with frontal and pa...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2008.05.057
更新日期:2008-10-01 00:00:00
abstract::It is well documented that emotionally arousing experiences are better remembered than mundane events. This is thought to occur through hippocampus-amygdala crosstalk during encoding, consolidation, and retrieval. Here we investigated whether emotional events (context) also cause a memory benefit for simultaneously en...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2016.08.069
更新日期:2016-12-01 00:00:00
abstract::The study of the stress response has been of great interest in the last decades due to its relationship to physical and mental health. Along with the technological progress in the neurosciences, different methods of stress induction have been developed for the special requirements regarding the acquisition of neuroima...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2017.12.061
更新日期:2018-05-01 00:00:00
abstract::In this work, we investigated the use of real-time functional magnetic resonance imaging (fMRI) with neurofeedback training (NFT) to teach volitional down-regulation of the auditory cortex (AC) using directed attention strategies as there is a growing interest in the application of fMRI-NFT to treat neurologic disorde...
journal_title:NeuroImage
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.neuroimage.2019.03.078
更新日期:2019-07-15 00:00:00
abstract::Recent real-time fMRI (rt-fMRI) training studies have demonstrated that subjects can achieve improved control over localized brain regions by using real-time feedback about the level of fMRI signal in these regions. It has remained unknown, however, whether subjects can gain control over anterior prefrontal cortex (PF...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2010.12.016
更新日期:2011-04-01 00:00:00
abstract::We used magnetic resonance imaging (MRI) and cortical pattern matching to map differences in cortical gray matter deficits between Alzheimer's disease (AD) and dementia with Lewy bodies (DLB), and explored the possible influence of gender on these patterns. Twenty-nine patients with AD (age 77.9 +/- 5.5), 16 patients ...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2004.04.026
更新日期:2004-09-01 00:00:00
abstract::Synchronous low-frequency oscillation in the resting human brain has been found to form networks of functionally associated areas and hence has been widely used to map the functional connectivity of the brain using techniques such as resting-state functional MRI (rsfMRI). Interestingly, similar resting-state networks ...
journal_title:NeuroImage
pub_type: 杂志文章,评审
doi:10.1016/j.neuroimage.2017.09.038
更新日期:2017-12-01 00:00:00
abstract::We determined if high-frequency gamma-oscillations (50- to 150-Hz) were induced by simple auditory communication over the language network areas in children with focal epilepsy. Four children (aged 7, 9, 10 and 16 years) with intractable left-hemispheric focal epilepsy underwent extraoperative electrocorticography (EC...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2008.03.011
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:Traumatic brain injury (TBI) is associated with cognitive and motor deficits, and poses a significant personal, societal, and economic burden. One mechanism by which TBI is thought to affect cognition and behavior is through changes in functional connectivity. Graph theory is a powerful framework for quantify...
journal_title:NeuroImage
pub_type: 杂志文章,评审
doi:10.1016/j.neuroimage.2016.12.003
更新日期:2017-10-15 00:00:00
abstract::The gamma-band response is thought to represent a key neural signature of information processing in the human brain. These brain signals have been associated with a variety of sensory modalities (vision, sensation, and audition) and also following basic motor responses, yet the functional significance of the motor gam...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2013.02.013
更新日期:2013-07-01 00:00:00
abstract::The ability to prepare for an action improves the speed and accuracy of its performance. While many studies indicate that behavior performance continues to improve throughout childhood and adolescence, it remains unclear whether or how preparatory processes change with development. Here, we used a rapid event-related ...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2014.03.008
更新日期:2014-09-01 00:00:00
abstract::Studies have shown that T2* contrast can reveal features of cortical anatomy. However, understanding the relationship between T2* contrast and the underlying cyto- and myelo-architecture is not an easy task, given the number of confounds, such as myelin, iron, blood vessels and structure orientation. Moreover, it is d...
journal_title:NeuroImage
pub_type: 杂志文章,评审
doi:10.1016/j.neuroimage.2013.01.023
更新日期:2014-06-01 00:00:00
abstract::The discrimination of voice-onset time, an acoustic-phonetic cue to voicing in stop consonants, was investigated to explore the neural systems underlying the perception of a rapid temporal speech parameter. Pairs of synthetic stimuli taken from a [da] to [ta] continuum varying in voice-onset time (VOT) were presented ...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2007.10.064
更新日期:2008-03-01 00:00:00
abstract::Although multivariate analytic techniques might identify diagnostic patterns that are not captured by univariate methods, they have rarely been used to study the neural correlates of Alzheimer's disease (AD) or cognitive impairment. Nonquantitative H2(15)O PET scans were acquired during rest in 17 probable AD subjects...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2004.04.032
更新日期:2004-09-01 00:00:00
abstract:INTRODUCTION:We assessed the usefulness of the P300 wave as endophenotype for schizophrenia by means of a meta-analysis of the literature as well as our own family study. METHOD:Meta-analysis: We conducted a systematic search for articles published between 1983 and 2003 that reported P300 measures in non-psychotic rel...
journal_title:NeuroImage
pub_type: 杂志文章,meta分析
doi:10.1016/j.neuroimage.2005.05.022
更新日期:2005-10-01 00:00:00
abstract::Normal ageing is accompanied by a progressive decline in cognitive function but the mechanisms for this are not fully understood. Nevertheless, the importance of white matter degeneration is supported by diffusion tensor imaging (DTI) studies, although several important questions remain about the pattern and nature of...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2010.02.033
更新日期:2010-06-01 00:00:00
abstract::How coherent neural oscillations are involved in task execution is a fundamental question in neuroscience. Although several electrophysiological studies have tackled this issue, the brain-wide task modulation of neural coherence remains uncharacterized. Here, with a fast fMRI technique, we studied shifts of brain-wide...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2020.117375
更新日期:2021-01-01 00:00:00
abstract::Diffusion-weighted (DW) MR images contain information about the orientation of brain white matter fibres that potentially can be used to study human brain connectivity in vivo using tractography techniques. Currently, the diffusion tensor model is widely used to extract fibre directions from DW-MRI data, but fails in ...
journal_title:NeuroImage
pub_type: 杂志文章
doi:10.1016/j.neuroimage.2007.02.016
更新日期:2007-05-01 00:00:00
abstract::The stress hormone cortisol is known to influence declarative memory and associative learning. In animals, stress has often been reported to have opposing effects on memory and learning in males and females. In humans, the effects of cortisol have mainly been studied at the behavioral level. The aim of the present exp...
journal_title:NeuroImage
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.neuroimage.2006.05.046
更新日期:2006-09-01 00:00:00