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https://www.readbyqxmd.com/read/29036668/neurobiological-commonalities-and-distinctions-among-three-major-psychiatric-diagnostic-categories-a-structural-mri-study
#1
Miao Chang, Fay Y Womer, E Kale Edmiston, Chuan Bai, Qian Zhou, Xiaowei Jiang, Shengnan Wei, Yange Wei, Yuting Ye, Haiyan Huang, Yong He, Ke Xu, Yanqing Tang, Fei Wang
BACKGROUND: Schizophrenia (SZ), bipolar disorder (BD), and major depressive disorder (MDD) are distinct diagnostic categories in current psychiatric nosology, yet there is increasing evidence for shared clinical and biological features in these disorders. No previous studies have examined brain structural features concurrently in these 3 disorders. The aim of this study was to identify the extent of shared and distinct brain alterations in SZ, BD, and MDD. We examined gray matter (GM) volume and white matter (WM) integrity in a total of 485 individuals (135 with SZ, 86 with BD, 108 with MDD, and 156 healthy controls [HC]) who underwent high-resolution structural magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) at a single site...
June 13, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29034243/improving-surgical-outcome-using-diffusion-tensor-imaging-techniques-in-deep-brain-stimulation
#2
REVIEW
Angela An Qi See, Nicolas Kon Kam King
INTRODUCTION: Recent advances in surgical imaging include the use of diffusion tensor imaging (DTI) in deep brain stimulation (DBS) and provide a detailed view of the white matter tracts and their connections which are not seen with conventional magnetic resonance imaging. Given that the efficacy of DBS depends on the precise and accurate targeting of these circuits, better surgical planning using information obtained from DTI may lead to improved surgical outcome. We aim to review the available literature to evaluate the efficacy of such a strategy...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/29033806/is-congenital-amusia-a-disconnection-syndrome-a-study-combining-tract-and-network-based-analysis
#3
Jieqiong Wang, Caicai Zhang, Shibiao Wan, Gang Peng
Previous studies on congenital amusia mainly focused on the impaired fronto-temporal pathway. It is possible that neural pathways of amusia patients on a larger scale are affected. In this study, we investigated changes in structural connections by applying both tract-based and network-based analysis to DTI data of 12 subjects with congenital amusia and 20 demographic-matched normal controls. TBSS (tract-based spatial statistics) was used to detect microstructural changes. The results showed that amusics had higher diffusivity indices in the corpus callosum, the right inferior/superior longitudinal fasciculus, and the right inferior frontal-occipital fasciculus (IFOF)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29033797/white-matter-abnormalities-in-children-with-hiv-infection-and-exposure
#4
Marcin Jankiewicz, Martha J Holmes, Paul A Taylor, Mark F Cotton, Barbara Laughton, André J W van der Kouwe, Ernesta M Meintjes
Background: Due to changes in guidelines and access to treatment, more children start combination antiretroviral therapy (ART) in infancy. With few studies examining the long-term effects of perinatal HIV infection and early ART on neurodevelopment, much is still unknown about brain maturation in the presence of HIV and ART. Follow-up studies of HIV infected (HIV+) children are important for monitoring brain development in the presence of HIV infection and ART. Methods: We use diffusion tensor imaging (DTI) to examine white matter (WM) in 65 HIV+ and 46 control (HIV exposed uninfected (HEU) and HIV unexposed uninfected (HU)) 7-year-old children...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29032126/weekly-follow-up-of-acute-lesions-in-three-early-multiple-sclerosis-patients-using-mr-spectroscopy-and-diffusion
#5
Gabriel Kocevar, Claudio Stamile, Salem Hannoun, Jean-Amédée Roch, Françoise Durand-Dubief, Sandra Vukusic, François Cotton, Dominique Sappey-Marinier
OBJECT: Pathophysiological mechanisms underlying multiple sclerosis (MS) lesion formation, including inflammation, demyelination/remyelination and axonal damage, and their temporal evolution are still not clearly understood. To this end, three acute white matter lesions were monitored using a weekly multimodal magnetic resonance (MR) protocol. MATERIALS AND METHODS: Three untreated patients with early relapsing-remitting MS and one healthy control subject were followed weekly for two months...
October 12, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/29031764/combined-resting-state-functional-magnetic-resonance-imaging-and-diffusion-tensor-imaging-study-in-patients-with-idiopathic-restless-legs-syndrome
#6
Yaoyao Zhuo, Yuncheng Wu, Yanhong Xu, Lunbo Lu, Ting Li, Xifu Wang, Kangan Li
OBJECTIVE: Restless legs syndrome (RLS) is a common neurological disorder characterized by an urge to move the legs along with paraesthesia deep within them. In this study, we aimed to use diffusion tensor imaging (DTI) and regional homogeneity (ReHo) to investigate the changes in regional spontaneous brain activity change for RLS patients against age- and gender-matched normal control (NC) subjects. METHODS: A total of 35 RLS patients and 27 age- and gender-matched NC subjects were recruited for group comparison research that used DTI and ReHo techniques...
October 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29031602/microstructural-mri-basis-of-the-cognitive-functions-in-patients-with-spinocerebellar-ataxia-type-2
#7
G Olivito, M Lupo, C Iacobacci, S Clausi, S Romano, M Masciullo, M Molinari, M Cercignani, M Bozzali, M Leggio
Spinocerebellarataxiatype2(SCA2) is an autosomal dominant neurodegenerative disease involving the cerebellum. The particular atrophy pattern results in some typical clinical features mainly including motor deficits. In addition, the presence of cognitive impairments, involving language, visuospatial and executive functions, has been also shown in SCA2 patients and it is now widely accepted as a feature of the disease. The aim of the study is to investigate the microstructural patterns and the anatomo-functional substrate that could account for the cognitive symptomatology observed in SCA2 patients...
October 11, 2017: Neuroscience
https://www.readbyqxmd.com/read/29030921/development-of-short-range-white-matter-in-healthy-children-and-adolescents
#8
Adeoye A Oyefiade, Stephanie Ameis, Jason P Lerch, Conrad Rockel, Kamila U Szulc, Nadia Scantlebury, Alexandra Decker, Jaleel Jefferson, Simon Spichak, Donald J Mabbott
Neural communication is facilitated by intricate networks of white matter (WM) comprised of both long and short range connections. The maturation of long range WM connections has been extensively characterized, with projection, commissural, and association tracts showing unique trajectories with age. There, however, remains a limited understanding of age-related changes occurring within short range WM connections, or U-fibers. These connections are important for local connectivity within lobes and facilitate regional cortical function and greater network economy...
October 14, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29030079/quantitative-temporal-changes-in-dti-values-coupled-with-histological-properties-in-cuprizone-induced-demyelination-and-remyelination
#9
Ryutaro Yano, Junichi Hata, Yoshifumi Abe, Fumiko Seki, Keitaro Yoshida, Yuji Komaki, Hideyuki Okano, Kenji F Tanaka
Diffusion tensor imaging (DTI) is widely used to evaluate microstructural variations in brain tissue. In particular, fractional anisotropy (FA), reflecting the magnitude and orientation of anisotropic water diffusion, allows us to detect pathological events in white matter. An ex vivo DTI study coupled with histological assessment is an efficient strategy to evaluate the myelination process, i.e. demyelination and remyelination. The relationship between DTI values and myelin content or the individual cellular components such as oligodendrocytes, microglia, and astrocytes during both processes of demyelination and remyelination are not well-understood...
October 10, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/29027841/diffusion-tensor-tractography-in-cerebral-small-vessel-disease-correlation-with-cognitive-function
#10
Maria M D'Souza, S P Gorthi, Kunal Vadwala, Richa Trivedi, C Vijayakumar, Prabhjot Kaur, Subash Khushu
Background Patients with cerebral small vessel disease may suffer from varying levels of cognitive deficit and may progress on to vascular dementia. The extent of involvement, as seen on conventional magnetic resonance (MR) measures, correlates poorly with the level of cognitive decline. The purpose of this study was to investigate the utility of diffusion tensor imaging (DTI) as a marker for white matter damage in small vessel disease and to assess its correlation with cognitive function. Methods Thirty consecutive patients with cerebral small vessel disease underwent conventional MR imaging, DTI, and neuropsychological assessment...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/29027831/evaluation-of-brain-targeting-in-rats-of-salvianolic-acid-b-nasal-delivery-by-the-microdialysis-technique
#11
Suiling Zhang, Yajun Shi, Lizhi Tang, Jing Wang, Dongyan Guo, Mei Wang, Xiaofei Zhang
The purpose of this study was to investigate the biodistribution of Salvianolic acid B in rats blood and brain after intranasal administration and explore its feasibility and evaluate its brain targeting effect. The concentration of Salvianolic acid B in blood and brain following nasal administration (32 mgċkg(-1)) was measured combining with microdialysis sampling and liquid chromatograph-mass spectrometer/MS detection technology. After the microdialysis samples were corrected with in vivo recoveries, the pharmacokinetic parameters were obtained by using non-compartment model and the brain targeting evaluated by the value of drug targeting index (DTI)...
October 13, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/29025726/gestational-age-at-birth-and-brain-white-matter-development-in-term-born-infants-and-children
#12
X Ou, C M Glasier, R H Ramakrishnaiah, A Kanfi, A C Rowell, R T Pivik, A Andres, M A Cleves, T M Badger
BACKGROUND AND PURPOSE: Studies on infants and children born preterm have shown that adequate gestational length is critical for brain white matter development. Less is known regarding how variations in gestational age at birth in term infants and children affect white matter development, which was evaluated in this study. MATERIALS AND METHODS: Using DTI tract-based spatial statistics methods, we evaluated white matter microstructures in 2 groups of term-born (≥37 weeks of gestation) healthy subjects: 2-week-old infants (n = 44) and 8-year-old children (n = 63)...
October 12, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29021839/diffusion-tensor-imaging-for-multilevel-assessment-of-the-visual-pathway-possibilities-for-personalized-outcome-prediction-in-autoimmune-disorders-of-the-central-nervous-system
#13
REVIEW
Joseph Kuchling, Alexander U Brandt, Friedemann Paul, Michael Scheel
The afferent visual pathway represents the most frequently affected white matter pathway in multiple sclerosis (MS) and neuromyelitis optica spectrum disorders (NMOSD). Diffusion tensor imaging (DTI) can reveal microstructural or non-overt brain tissue damage and quantify pathological processes. DTI facilitates the reconstruction of major white matter fiber tracts allowing for the assessment of structure-function and damage-dysfunction relationships. In this review, we outline DTI studies investigating the afferent visual pathway in idiopathic optic neuritis (ON), NMOSD, and MS...
September 2017: EPMA Journal
https://www.readbyqxmd.com/read/29019716/subclinical-impairment-of-the-left-ventricular-longitudinal-function-in-patients-with-prolactinomas
#14
Xiao-Bing Jiang, Jing Zhang, Cui-Ling Li, Zhi-Gang Mao, Bin Hu, Zhe Zhu, Yong-Hong Zhu, Hai-Jun Wang
Purpose Hyperprolactinemia has been associated with endothelial dysfunction and a wide range of cardiovascular risk factors, thus it can potentially lead to cardiac dysfunction. The present study was designed to interrogate our hypothesis that hyperprolactinemia can contribute to preclinical impaired left ventricular function. Patients and Methods Thirty-one prolactinoma patients and sixty healthy volunteers were prospectively recruited. Left ventricular function was evaluated using conventional two dimensions and M-mode echocardiography, as well as Doppler tissues imaging (DTI)...
October 11, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28993605/a-case-of-diffuse-alveolar-hemorrhage-as-a-possible-complication-of-bivalirudin-therapy
#15
Htun Latt, Sammy Aung, Kyaw Kyaw, Thein Tun Aung, Chanwit Roongsritong
BACKGROUND Diffuse alveolar hemorrhage (DAH) is a rare but potentially fatal complication of anticoagulant or antiplatelet therapy. Bivalirudin is a specific and reversible direct thrombin inhibitor (DTI). CASE REPORT We report a case of severe DAH, possibly related to bivalirudin use, in a 61-year-old patient undergoing coronary intervention. The patient had presented with an out-of-hospital cardiac arrest due to acute ST elevation myocardial infarction (STEMI). During the coronary intervention, shortly after receiving bivalirudin, the patient started having frank bleeding from the endotracheal tube and developed hemodynamic compromise...
October 10, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28992395/changes-in-white-matter-microstructure-predict-lithium-response-in-adolescents-with-bipolar-disorder
#16
Vivian Kafantaris, Linda Spritzer, Vishal Doshi, Ema Saito, Philip R Szeszko
OBJECTIVES: To investigate whether response to lithium treatment in pediatric bipolar disorder can be predicted by changes in white matter microstructure in key cortico-limbic tracts involved in emotion regulation. METHODS: Eighteen clinically referred lithium-naive patients (mean age 15.5 years) were administered clinical rating scales and diffusion tensor imaging (DTI) examinations at baseline and following 4 weeks of lithium treatment. Clinical ratings were repeated following 8 weeks of treatment...
October 9, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28991695/monozygotic-twins-with-a-new-compound-heterozygous-spg11-mutation-and-different-disease-expression
#17
Christiane Schneider-Gold, Gabriele Dekomien, Martin Regensburger, Ruth Schneider, Nadine Trampe, Christos Krogias, Carsten Lukas, Barbara Bellenberg
BACKGROUND: A pair of monozygotic 22-year-old twins with complicated hereditary spastic paraplegia caused by a novel SPG11 mutation is described. METHODS: Genetic testing and thorough clinical examination, magnetic resonance imaging (MRI) and MR-spectroscopy were performed. RESULTS: The twins were compound heterozygous for a known frameshift as well as a novel splice site mutation in the SPG11 gene. Clinically the patients showed a similar spectrum of symptoms but different disease presentation...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28990866/neuroanatomical-correlates-of-emotion-processing-in-children-with-unilateral-brain-lesion-a-preliminary-study-of-limbic-system-organization
#18
Rowena Ng, Philip Lai, Timothy T Brown, Anna Järvinen, Eric Halgren, Ursula Bellugi, Doris Trauner
In this study, MRI and DTI were employed to examine subcortical volume and microstructural properties (FA, MD) of the limbic network, and their relationships with affect discrimination in 13 FL (6 right FL, M = 10.17 years; 7 left FL; M = 10.09) and 13 typically-developing children (TD; M = 10.16). Subcortical volume of the amygdala, hippocampus and thalamus and FA and MD of the fornix and anterior thalamic radiation (ATR) were examined. Results revealed no group differences across emotion-perception tasks or amygdalar volume...
October 9, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/28990240/reduced-striato-cortical-and-inhibitory-transcallosal-connectivity-in-the-motor-circuit-of-huntington-s-disease-patients
#19
Clara Garcia-Gorro, Ruth de Diego-Balaguer, Saul Martínez-Horta, Jesus Pérez-Pérez, Jaime Kulisevsky, Nadia Rodríguez-Dechicha, Irene Vaquer, Susana Subira, Matilde Calopa, Esteban Muñoz, Pilar Santacruz, Jesús Ruiz-Idiago, Celia Mareca, Nuria Caballol, Estela Camara
Huntington's disease (HD) is a neurodegenerative disorder which is primarily associated with striatal degeneration. However, the alterations in connectivity of this structure in HD have been underinvestigated. In this study, we analyzed the functional and structural connectivity of the left putamen, while participants performed a finger-tapping task. Using fMRI and DW-MRI, 30 HD gene expansion carriers (HDGEC) and 29 healthy participants were scanned. Psychophysiological interaction analysis and DTI-based tractography were employed to examine functional and structural connectivity, respectively...
October 8, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28989561/eigenvalues-of-random-matrices-with-isotropic-gaussian-noise-and-the-design-of-diffusion-tensor-imaging-experiments
#20
Dario Gasbarra, Sinisa Pajevic, Peter J Basser
Tensor-valued and matrix-valued measurements of different physical properties are increasingly available in material sciences and medical imaging applications. The eigenvalues and eigenvectors of such multivariate data provide novel and unique information, but at the cost of requiring a more complex statistical analysis. In this work we derive the distributions of eigenvalues and eigenvectors in the special but important case of m×m symmetric random matrices, D, observed with isotropic matrix-variate Gaussian noise...
2017: SIAM Journal on Imaging Sciences
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