keyword
MENU ▼
Read by QxMD icon Read
search

Cingulum

keyword
https://www.readbyqxmd.com/read/28081226/regional-homogeneity-changes-in-nicotine-addicts-by-resting-state-fmri
#1
Hongbo Chen, Shaofeng Mo
OBJECTIVE: To reveal the brain functional changes of nicotine addicts compared with those of non-smokers and explore the objective biomarker for nicotine dependence evaluation. METHODS: A total of 14 smokers and 11 non-smoking controls were recruited for this study. Resting-state functional magnetic resonance imaging and regional homogeneity (ReHo) were applied in the neural activity analysis. Two-sample t-test was performed to examine the voxel-wise difference between the smokers and the controls...
2017: PloS One
https://www.readbyqxmd.com/read/28066709/alterations-of-white-matter-structural-networks-in-patients-with-non-neuropsychiatric-systemic-lupus-erythematosus-identified-by-probabilistic-tractography-and-connectivity-based-analyses
#2
Man Xu, Xiangliang Tan, Xinyuan Zhang, Yihao Guo, Yingjie Mei, Qianjin Feng, Yikai Xu, Yanqiu Feng
PURPOSE: Systemic lupus erythematosus (SLE) is a chronic inflammatory female-predominant autoimmune disease that can affect the central nervous system and exhibit neuropsychiatric symptoms. In SLE patients without neuropsychiatric symptoms (non-NPSLE), recent diffusion tensor imaging studies showed white matter abnormalities in their brains. The present study investigated the entire brain white matter structural connectivity in non-NPSLE patients by using probabilistic tractography and connectivity-based analyses...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28066707/longitudinal-changes-in-microstructural-white-matter-metrics-in-alzheimer-s-disease
#3
Chantel D Mayo, Erin L Mazerolle, Lesley Ritchie, John D Fisk, Jodie R Gawryluk
BACKGROUND: Alzheimer's disease (AD) is a progressive neurodegenerative disorder. Current avenues of AD research focus on pre-symptomatic biomarkers that will assist with early diagnosis of AD. The majority of magnetic resonance imaging (MRI) based biomarker research to date has focused on neuronal loss in grey matter and there is a paucity of research on white matter. METHODS: Longitudinal DTI data from the Alzheimer's Disease Neuroimaging Initiative 2 database were used to examine 1) the within-group microstructural white matter changes in individuals with AD and healthy controls at baseline and year one; and 2) the between-group microstructural differences in individuals with AD and healthy controls at both time points...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28065876/three-dimensional-anatomy-of-the-white-matter-fibers-of-the-temporal-lobe-surgical-implications
#4
L Pescatori, M P Tropeano, A Manfreda, R Delfini, A Santoro
BACKGROUND: The aim of this work is to describe in detail the complex three-dimensional organization of the white matter of the temporal lobe and discuss the surgical implications of the approaches to lesions located into the mesial temporal region and within the temporal horn and the atrium of the lateral ventricles. METHODS: Sixteen human cerebral hemispheres fixed in a 10% formalin solution for at least 40 days were studied. After removal of the arachnoid membrane, the hemispheres were frozen at -15 C° for at least 15 days , and the Klingler' technique which consist in the microscopic dissection and progressive identification of white matter fibers was performed...
January 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28046822/su-f-i-17-white-matter-track-based-analysis-at-limbic-abnormalities-in-cognitive-impairment
#5
R Juh, T Suh, J Han, C Kim, C Oh
PURPOSE: Mild cognitive impairment with depression (MCID) is common and associated with disability and cognitive impairment, with high probability of relapse. Hypothesize that a sign of WM disintegration would be observed in MCID than MCI nondepression (MCIND), especially in frontal and limbic regions and patients with depression would show reduced GM density in the hippocampus, amygdala, anterior gyrus cingulate, and dorsolateral prefrontal cortex (DLPFC) and dorsomedial prefrontal cortex (DMPFC) the abnormalities of long association fiber tracts integrity are correlated with geriatric depression...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28018208/global-efficiency-of-structural-networks-mediates-cognitive-control-in-mild-cognitive-impairment
#6
Rok Berlot, Claudia Metzler-Baddeley, M Arfan Ikram, Derek K Jones, Michael J O'Sullivan
Background: Cognitive control has been linked to both the microstructure of individual tracts and the structure of whole-brain networks, but their relative contributions in health and disease remain unclear. Objective: To determine the contribution of both localized white matter tract damage and disruption of global network architecture to cognitive control, in older age and Mild Cognitive Impairment (MCI). Materials and Methods: Twenty-five patients with MCI and 20 age, sex, and intelligence-matched healthy volunteers were investigated with 3 Tesla structural magnetic resonance imaging (MRI)...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28012640/white-matter-integrity-and-symptom-dimensions-of-schizophrenia-a-diffusion-tensor-imaging-study
#7
Miriam H A Bopp, Rebecca Zöllner, Andreas Jansen, Bruno Dietsche, Axel Krug, Tilo T J Kircher
Impaired fiber bundle connectivity between brain regions is a key neuropathological finding in schizophrenia. Symptom dimensions in schizophrenia can be clustered into factor models. Single syndromes have been related to grey and white matter brain structure alterations. We associated all core syndromes of schizophrenia in a single patient group with changes in white matter integrity. Diffusion weighted images (3T MRI) and SAPS/SANS scores were measured in 26 male patients and 26 healthy controls. First, group differences in fractional anisotropy (FA) were calculated with TBSS...
December 21, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/28012424/white-matter-microstructure-and-volitional-motor-activity-in-schizophrenia-a-diffusion-kurtosis-imaging-study
#8
Lise Docx, Louise Emsell, Wim Van Hecke, Timo De Bondt, Paul M Parizel, Bernard Sabbe, Manuel Morrens
Avolition is a core feature of schizophrenia and may arise from altered brain connectivity. Here we used diffusion kurtosis imaging (DKI) to investigate the association between white matter (WM) microstructure and volitional motor activity. Multi-shell diffusion MRI and 24-h actigraphy data were obtained from 20 right-handed patients with schizophrenia and 16 right-handed age and gender matched healthy controls. We examined correlations between fractional anisotropy (FA), mean diffusivity (MD), mean kurtosis (MK), and motor activity level, as well as group differences in these measures...
October 15, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/28009132/tract-specific-atrophy-in-focal-epilepsy-disease-genetics-or-seizures
#9
David N Vaughan, David Raffelt, Evan Curwood, Meng-Han Tsai, Jacques-Donald Tournier, Alan Connelly, Graeme D Jackson
OBJECTIVE: To investigate whether genetics, underlying pathology or repeated seizures contribute to atrophy in specific white matter tracts. METHODS: Medically-refractory unilateral temporal lobe epilepsy with hippocampal sclerosis (HS-TLE, n=26) was studied as an archetype of focal epilepsy, using fixel-based analysis of diffusion-weighted imaging. A genetic effect was assessed in first-degree relatives of HS-TLE who did not have epilepsy themselves (HS-1°Rel; n=26)...
December 23, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/27999362/body-machine-interfaces-after-spinal-cord-injury-rehabilitation-and-brain-plasticity
#10
Ismael Seáñez-González, Camilla Pierella, Ali Farshchiansadegh, Elias B Thorp, Xue Wang, Todd Parrish, Ferdinando A Mussa-Ivaldi
The purpose of this study was to identify rehabilitative effects and changes in white matter microstructure in people with high-level spinal cord injury following bilateral upper-extremity motor skill training. Five subjects with high-level (C5-C6) spinal cord injury (SCI) performed five visuo-spatial motor training tasks over 12 sessions (2-3 sessions per week). Subjects controlled a two-dimensional cursor with bilateral simultaneous movements of the shoulders using a non-invasive inertial measurement unit-based body-machine interface...
December 19, 2016: Brain Sciences
https://www.readbyqxmd.com/read/27981671/distinct-white-matter-injury-associated-with-medial-temporal-lobe-atrophy-in-alzheimer-s-versus-semantic-dementia
#11
Alexandre Bejanin, Béatrice Desgranges, Renaud La Joie, Brigitte Landeau, Audrey Perrotin, Florence Mézenge, Serge Belliard, Vincent de La Sayette, Francis Eustache, Gaël Chételat
This study aims at further understanding the distinct vulnerability of brain networks in Alzheimer's disease (AD) versus semantic dementia (SD) investigating the white matter injury associated with medial temporal lobe (MTL) atrophy in both conditions. Twenty-six AD patients, twenty-one SD patients, and thirty-nine controls underwent a high-resolution T1-MRI scan allowing to obtain maps of grey matter volume and white matter density. A statistical conjunction approach was used to identify MTL regions showing grey matter atrophy in both patient groups...
December 16, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27932995/genome-sizes-of-nine-insect-species-determined-by-flow-cytometry-and-k-mer-analysis
#12
Kang He, Kejian Lin, Guirong Wang, Fei Li
The flow cytometry method was used to estimate the genome sizes of nine agriculturally important insects, including two coleopterans, five Hemipterans, and two hymenopterans. Among which, the coleopteran Lissorhoptrus oryzophilus (Kuschel) had the largest genome of 981 Mb. The average genome size was 504 Mb, suggesting that insects have a moderate-size genome. Compared with the insects in other orders, hymenopterans had small genomes, which were averagely about ~200 Mb. We found that the genome sizes of four insect species were different between male and female, showing the organismal complexity of insects...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27915065/assessment-of-white-matter-transgression-during-neuroendoscopic-procedures-using-dti-fiber-tracking
#13
Sergio García, Jordina Rincon-Torroella, Arnau Benet, Laura Oleaga, José Juan González Sánchez
BACKGROUND: Presurgical planning allows anticipating intraoperative difficulties, increasing efficiency, and reducing risks. Neuroendoscopy is a minimally invasive technique whose related complications have been focused on cortical function and surface vessels injury. However, white matter disruption has been insufficiently acknowledged. OBJECTIVE: To present a new surgical planning method based on diffusion tensor image that allows quantifying subcortical transgression and optimizing neuroendoscopic trajectories...
November 30, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27914246/tract-based-analysis-of-white-matter-integrity-in-psychotic-and-nonpsychotic-bipolar-disorder
#14
Andrew Ji, Douglass Godwin, Jerrel Rutlin, Sridhar Kandala, Joshua S Shimony, Daniel Mamah
BACKGROUND: At least 50% of individuals with bipolar disorder (BD) present with psychosis during their lifetime. Psychotic symptoms have sometimes been linked to specific genetic and phenotypic markers. This study aims to explore potential differences between bipolar disorder subtypes by measuring white matter integrity of the brain and relationships with clinical measures. METHODS: Diffusion tensor imaging and clinical measures were acquired from 102 participants, grouped as psychotic bipolar disorder (PBD) (n=48), non-psychotic bipolar disorder (NBD) (n=24), and healthy controls (n=30)...
February 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27913960/neuroimaging-abnormalities-in-clade-c-hiv-are-independent-of-tat-genetic-diversity
#15
Robert H Paul, Sarah Phillips, Jacqueline Hoare, David H Laidlaw, Ryan Cabeen, Gayla R Olbricht, Yuqing Su, Dan J Stein, Susan Engelbrecht, Soraya Seedat, Lauren E Salminen, Laurie M Baker, Jodi Heaps, John Joska
Controversy remains regarding the neurotoxicity of clade C human immunodeficiency virus (HIV-C). When examined in preclinical studies, a cysteine to serine substitution in the C31 dicysteine motif of the HIV-C Tat protein (C31S) results in less severe brain injury compared to other viral clades. By contrast, patient cohort studies identify significant neuropsychological impairment among HIV-C individuals independent of Tat variability. The present study clarified this discrepancy by examining neuroimaging markers of brain integrity among HIV-C individuals with and without the Tat substitution...
December 2, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27912172/brain-heart-communication-evidence-for-central-pacemaker-oscillations-with-a-dominant-frequency-at-0-1hz-in-the-cingulum
#16
Gert Pfurtscheller, Andreas R Schwerdtfeger, Annemarie Seither-Preisler, Clemens Brunner, Christoph Stefan Aigner, Joana Brito, Marciano P Carmo, Alexandre Andrade
OBJECTIVES: In the brain and heart, oscillations at about 0.1Hz are conspicuous. It is therefore worthwhile to study the interaction between intrinsic BOLD oscillations (0.1Hz) and slow oscillations in heart rate interval (RRI) signals and differentiate between their neural and vascular origin. METHODS: We studied the phase-coupling with a 3T scanner with high scanning rate between BOLD signals in 22 regions and simultaneously recorded RRI oscillations in 23 individuals in two resting states...
January 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27911306/cortical-thickness-and-microstructural-white-matter-changes-detect-amnestic-mild-cognitive-impairment
#17
Zan Wang, Zhengjia Dai, Hao Shu, Duan Liu, Qihao Guo, Yong He, Zhijun Zhang
Both the apolipoprotein E (APOE) ɛ4 allele and amnestic mild cognitive impairment (aMCI) are considered to be risk factors for Alzheimer's disease (AD). The primary aim of this study was to determine whether the aMCI-related abnormality in gray matter (GM) cortical thickness and white matter (WM) tracts integrity would be modified by the APOE genotype. A total of 146 older adults, including 64 aMCI patients (28 ɛ4 carriers and 36 non-carriers) and 82 healthy controls (39 ɛ4 carriers and 43 non-carriers), underwent a standardized clinical interview, neuropsychological battery assessment, and multi-modal brain magnetic resonance imaging scans...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27905410/association-between-preterm-brain-injury-and-exposure-to-chorioamnionitis-during-fetal-life
#18
Devasuda Anblagan, Rozalia Pataky, Margaret J Evans, Emma J Telford, Ahmed Serag, Sarah Sparrow, Chinthika Piyasena, Scott I Semple, Alastair Graham Wilkinson, Mark E Bastin, James P Boardman
Preterm infants are susceptible to inflammation-induced white matter injury but the exposures that lead to this are uncertain. Histologic chorioamnionitis (HCA) reflects intrauterine inflammation, can trigger a fetal inflammatory response, and is closely associated with premature birth. In a cohort of 90 preterm infants with detailed placental histology and neonatal brain magnetic resonance imaging (MRI) data at term equivalent age, we used Tract-based Spatial Statistics (TBSS) to perform voxel-wise statistical comparison of fractional anisotropy (FA) data and computational morphometry analysis to compute the volumes of whole brain, tissue compartments and cerebrospinal fluid, to test the hypothesis that HCA is an independent antenatal risk factor for preterm brain injury...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27904504/recovery-of-an-injured-anterior-cingulum-to-the-basal-forebrain-in-a-patient-with-brain-injury-a-4-year-follow-up-study-of-cognitive-function
#19
Sung Ho Jang, Hyeok Gyu Kwon
No abstract text is available yet for this article.
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27899333/abnormalities-of-brain-neural-circuits-related-to-obesity-a-diffusion-tensor-imaging-study
#20
Ioannis Papageorgiou, Loukas G Astrakas, Vassileios Xydis, George A Alexiou, Panagiotis Bargiotas, Loukia Tzarouchi, Anastasia K Zikou, Dimitrios N Kiortsis, Maria I Argyropoulou
PURPOSE: Increased Body-Mass-Index (BMI) has been associated with brain atrophy in both gray and white matter structures. However, little is known concerning the integrity of white matter tracts in obesity. The purpose of the study was to evaluate the pattern of changes in white matter microstructure in human adiposity. MATERIAL AND METHODS: The study included 268 participants (52 obese, 96 overweight and 120 normal-weight) that were retrospectively evaluated by Diffusion Tensor Imaging...
November 27, 2016: Magnetic Resonance Imaging
keyword
keyword
30878
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"