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https://www.readbyqxmd.com/read/28629742/statistical-differences-in-the-white-matter-tracts-in-subjects-with-depression-by-using-different-skeletonized-voxel-wise-analysis-approaches-and-dti-fitting-procedures
#1
Maurizio Bergamino, Madison Farmer, Hung-Wen Yeh, Elisabeth Paul, J Paul Hamilton
Major depressive disorder (MDD) is one of the most significant contributors to the global burden of illness. Diffusion tensor imaging (DTI) is a procedure that has been used in several studies to characterize abnormalities in white matter (WM) microstructural integrity in MDD. These studies, however, have provided divergent findings, potentially due to the large variety of methodological alternatives available in conducting DTI research. In order to determine the importance of different approaches to coregistration of DTI-derived metrics to a standard space, we compared results from two different skeletonized voxel-wise analysis approaches: the standard TBBS pipeline and the Advanced Normalization Tools (ANTs) approach incorporating a symmetric image normalization (SyN) algorithm and a group-wise template (ANTs TBSS)...
June 16, 2017: Brain Research
https://www.readbyqxmd.com/read/28627942/diffusion-imaging-of-mild-traumatic-brain-injury-in-the-impact-accelerated-rodent-model-a-pilot-study
#2
Zora Kikinis, Marc Muehlmann, Ofer Pasternak, Sharon Peled, Praveen Kulkarni, Craig Ferris, Sylvain Bouix, Yogesh Rathi, Inga K Koerte, Steve Pieper, Alexander Yarmarkovich, Caryn L Porter, Bruce S Kristal, Martha E Shenton
PRIMARY OBJECTIVE: There is a need to understand pathologic processes of the brain following mild traumatic brain injury (mTBI). Previous studies report axonal injury and oedema in the first week after injury in a rodent model. This study aims to investigate the processes occurring 1 week after injury at the time of regeneration and degeneration using diffusion tensor imaging (DTI) in the impact acceleration rat mTBI model. RESEARCH DESIGN: Eighteen rats were subjected to impact acceleration injury, and three rats served as sham controls...
June 19, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28609689/a-distinctive-abnormality-of-diffusion-tensor-imaging-parameters-in-the-fornix-of-patients-with-bipolar-ii-disorder
#3
Akeo Kurumaji, Michio Itasaka, Akihito Uezato, Kazuo Takiguchi, Daisuke Jitoku, Mizue Hobo, Toru Nishikawa
Diffusion tensor imaging (DTI) studies have revealed a changed integrity in the white matter of bipolar disorder. However, only a few investigations have examined bipolar II disorder (BP-II). A cross-sectional study was conducted to compare thirty-eight patients with BP-II (mean age = 38.26 years, F/M = 19/19) with thirty-eight age- and gender-matched healthy controls (mean age = 34.45 years, F/M = 18/20). Tract Based Spatial Statistics (TBSS) analysis of the fractional anisotropy (FA) was done with age, gender and education years as covariates, then a complementary atlas-based region-of-interest (ROI) analysis including the axial diffusivity (AD) and radial diffusivity (RD) was conducted to obtain further information...
June 8, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28579941/chronic-ketamine-exposure-causes-white-matter-microstructural-abnormalities-in-adolescent-cynomolgus-monkeys
#4
Qi Li, Lin Shi, Gang Lu, Hong-Luan Yu, Fu-Ki Yeung, Nai-Kei Wong, Lin Sun, Kai Liu, David Yew, Fang Pan, De-Feng Wang, Pak C Sham
Acute and repeated exposures to ketamine mimic aspects of positive, negative, and cognitive symptoms of schizophrenia in humans. Recent studies by our group and others have shown that chronicity of ketamine use may be a key element for establishing a more valid model of cognitive symptoms of schizophrenia. However, current understanding on the long-term consequences of ketamine exposure on brain circuits has remained incomplete, particularly with regard to microstructural changes of white matter tracts that underpin the neuropathology of schizophrenia...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28566550/disconnection-as-a-mechanism-for-social-cognition-impairment-in-multiple-sclerosis
#5
Sonia Batista, Carolina Alves, Otília C d'Almeida, Ana Afonso, Ricardo Félix-Morais, João Pereira, Carmo Macário, Lívia Sousa, Miguel Castelo-Branco, Isabel Santana, Luís Cunha
OBJECTIVE: To assess the contribution of microstructural normal-appearing white matter (NAWM) damage to social cognition impairment, specifically in the theory of mind (ToM), in multiple sclerosis (MS). METHODS: We enrolled consecutively 60 patients with MS and 60 healthy controls (HC) matched on age, sex, and education level. All participants underwent ToM testing (Eyes Test, Videos Test) and 3T brain MRI including conventional and diffusion tensor imaging sequences...
May 31, 2017: Neurology
https://www.readbyqxmd.com/read/28536205/severe-retinopathy-of-prematurity-predicts-delayed-white-matter-maturation-and-poorer-neurodevelopment
#6
Torin J A Glass, Vann Chau, Jane Gardiner, Justin Foong, Jillian Vinall, Jill G Zwicker, Ruth E Grunau, Anne Synnes, Kenneth J Poskitt, Steven P Miller
OBJECTIVE: To determine whether severe retinopathy of prematurity (ROP) is associated with (1) abnormal white matter maturation and (2) neurodevelopmental outcomes at 18 months' corrected age (CA) compared with neonates without severe ROP. DESIGN: We conducted a prospective longitudinal cohort of extremely preterm neonates born 24-28 weeks' gestational age recruited between 2006 and 2013 with brain MRIs obtained both early in life and at term-equivalent age. Severe ROP was defined as ROP treated with retinal laser photocoagulation...
May 23, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28529875/advanced-magnetic-resonance-imaging-and-neuropsychological-assessment-for-detecting-brain-injury-in-a-prospective-cohort-of-university-amateur-boxers
#7
M G Hart, C R Housden, J Suckling, R Tait, A Young, U Müller, V F J Newcombe, I Jalloh, B Pearson, J Cross, R A Trivedi, J D Pickard, B J Sahakian, P J Hutchinson
BACKGROUND/AIM: The safety of amateur and professional boxing is a contentious issue. We hypothesised that advanced magnetic resonance imaging and neuropsychological testing could provide evidence of acute and early brain injury in amateur boxers. METHODS: We recruited 30 participants from a university amateur boxing club in a prospective cohort study. Magnetic resonance imaging (MRI) and neuropsychological testing was performed at three time points: prior to starting training; within 48 h following a first major competition to detect acute brain injury; and one year follow-up...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28526303/the-use-of-biobrane-%C3%A2-for-wound-coverage-in-stevens-johnson-syndrome-and-toxic-epidermal-necrolysis
#8
Alan D Rogers, Erin Blackport, Robert Cartotto
INTRODUCTION: Published experience describing the use of Biobrane(®) for wound management in Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis (SJS-TEN) is limited to case reports and case series involving ten or fewer patients. We have used Biobrane(®) in the care of SJS-TEN since 2000, and the purpose of this study was to review our experience with the application of Biobrane(®) for wound coverage in SJS-TEN. METHODS: A retrospective review of all cases of SJS-TEN admitted to an adult regional ABA-verified burn center between January 1, 2000 and June 1, 2015 was conducted...
May 16, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28510708/aberrant-white-matter-microstructure-in-children-and-adolescents-with-the-subtype-of-prader-willi-syndrome-at-high-risk-for-psychosis
#9
Akvile Lukoshe, Gerbrich E van den Bosch, Aad van der Lugt, Steven A Kushner, Anita C Hokken-Koelega, Tonya White
Prader-Willi Syndrome (PWS) is a complex neurogenetic disorder caused by loss of the paternal 15q11.2-q13 locus, due to deletion (DEL), maternal uniparental disomy (mUPD), or imprinting center defects. Individuals with mUPD have up to 60% risk of developing psychosis in early adulthood. Given the increasing evidence for white matter abnormalities in psychotic disorders, we investigated white matter microstructure in children and adolescents with PWS, with a particular emphasis on the DEL and mUPD subtypes. Magnetic resonance diffusion weighted images were acquired in 35 directions at 3T and analyzed using fractional anisotropy (FA), mean, axial, and radial diffusivity (MD, AD, RD) values obtained by tract-based spatial statistics (TBSS) in 28 children and adolescents with PWS and 61 controls...
May 16, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28503904/white-matter-compromise-in-autism-differentiating-motion-confounds-from-true-differences-in-diffusion-tensor-imaging
#10
Seraphina K Solders, Ruth A Carper, Ralph-Axel Müller
Common findings from diffusion tensor imaging (DTI) in autism spectrum disorder (ASD) include reduced fractional anisotropy (FA), and increased mean and radial diffusivity (MD, RD) of white matter tracts. However, findings may be confounded by head motion. We examined how group-level motion matching affects DTI comparisons between ASD and typically developing (TD) groups. We included 57 ASD and 50 TD participants, comparing three subsets at increasing levels of motion-matching stringency: full sample (FS); quality-controlled (QC); and quantitatively-matched (QM)...
May 15, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28486224/long-term-neuropathological-changes-associated-with-cerebral-palsy-in-a-nonhuman-primate-model-of-hypoxic-ischemic-encephalopathy
#11
Ryan M McAdams, Bobbi Fleiss, Christopher Traudt, Leslie Schwendimann, Jessica M Snyder, Robin L Haynes, Niranjana Natarajan, Pierre Gressens, Sandra E Juul
BACKGROUND: Cerebral palsy (CP) is the most common motor disability in childhood, with a worldwide prevalence of 1.5-4/1,000 live births. Hypoxic-ischemic encephalopathy (HIE) contributes to the burden of CP, but the long-term neuropathological findings of this association remain limited. METHODOLOGY: Thirty-four term Macaca nemestrina macaques were included in this long-term neuropathological study: 9 control animals delivered by cesarean section and 25 animals with perinatal asphyxia delivered by cesarean section after 15-18 min of umbilical cord occlusion (UCO)...
May 10, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28482644/olfactory-impairment-in-parkinson-s-disease-studied-with-diffusion-tensor-and%C3%A2-magnetization-transfer-imaging
#12
Charalampos Georgiopoulos, Marcel Warntjes, Nil Dizdar, Helene Zachrisson, Maria Engström, Sven Haller, Elna-Marie Larsson
BACKGROUND: Olfactory impairment is an early manifestation of Parkinson's disease (PD). Diffusion Tensor Imaging (DTI) and Magnetization Transfer (MT) are two imaging techniques that allow noninvasive detection of microstructural changes in the cerebral white matter. OBJECTIVE: To assess white matter alterations associated with olfactory impairment in PD, using a binary imaging approach with DTI and MT. METHODS: 22 PD patients and 13 healthy controls were examined with DTI, MT and an odor discrimination test...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28478977/diffusion-tensor-fractional-anisotropy-in-the-superior-longitudinal-fasciculus-correlates-with-functional-independence-measure-cognition-scores-in-patients-with-cerebral-infarction
#13
Tetsuo Koyama, Kazuhisa Domen
BACKGROUND: This study aimed to determine the relationship between fiber tract degeneration measured by diffusion-tensor imaging (DTI) and outcome of patients after cerebral infarction. METHODS: Fractional anisotropy (FA) maps were generated by DTI in patients 14-21 days after the first infarction and were analyzed by tract-based spatial statistics (TBSS). Mean FA values within the corticospinal tract (CST) and the superior longitudinal fasciculus (SLF) were extracted from individual TBSS data...
May 3, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28470928/longitudinal-differences-in-white-matter-integrity-in-youth-at-high-familial-risk-for-bipolar-disorder
#14
Rossana Ganzola, Thomas Nickson, Mark E Bastin, Stephen Giles, Alix Macdonald, Jessika Sussmann, Andrew M McIntosh, Heather C Whalley, Simon Duchesne
OBJECTIVES: Previous neuroimaging studies have reported abnormalities in white matter (WM) pathways in subjects at high familial risk of mood disorders. In the current study, we examined the trajectory of these abnormalities during the early stages of illness development using longitudinal diffusion tensor imaging (DTI) data. METHODS: Subjects (16-28 years old) were recruited in the Scottish Bipolar Family Study, a prospective longitudinal study that has examined individuals at familial risk of mood disorder on three occasions, 2 years apart...
May 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28444426/investigation-of-altered-microstructure-in-patients-with-drug-refractory-epilepsy-using-diffusion-tensor-imaging
#15
Yuwei Jiang, Lingyan Mao, Xu Yan, Mingxia Fan, Xin Wang, Jing Ding, Dongrong Xu
PURPOSE: The risk of refractory epilepsy can be more dangerous than the adverse effect caused by medical treatment. In this study, we employed voxel-wise analysis (VWA) and tract-based spatial statistics (TBSS) methods to measure microstructural changes using diffusion tensor imaging (DTI) in patients of drug refractory epilepsy (DRE) who had been epileptic for more than 10 years. METHODS: To examine the specific microstructural abnormalities in DRE patients and its difference from medically controlled epilepsy (MCE), we acquired DTI data of 7 DRE patients, 37 MCE patients, and 31 healthy controls (HCs) using a 3 T MRI scanner...
April 25, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28437669/white-matter-microstructural-abnormalities-and-their-association-with-anticipatory-anhedonia-in-depression
#16
Xin-Hua Yang, Yi Wang, Dong-Fang Wang, Kai Tian, Eric F C Cheung, Guang-Rong Xie, Raymond C K Chan
Anhedonia is associated with dysfunction of the neural circuitry of reward in patients with major depressive disorder (MDD). However, its neurobiological basis is not fully understood. The present study examined the association between anhedonia and white matter (WM) characteristics in patients with first-episode MDD. We recruited 30 patients with first-episode drug-naive MDD and 28 healthy controls (HC) to undergo diffusion weighted imaging. We examined specifically the correlation between WM characteristics and anhedonia measured with the Temporal Experience of Pleasure Scale (TEPS) in MDD patients...
April 13, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28429448/white-matter-microstructure-variations-contribute-to-neurological-soft-signs-in-healthy-adults
#17
Dusan Hirjak, Philipp A Thomann, Robert C Wolf, Katharina M Kubera, Caspar Goch, Jan Hering, Klaus H Maier-Hein
OBJECTIVE: Neurological soft signs (NSS) are core features of psychiatric disorders with significant neurodevelopmental origin. However, it is unclear whether NSS correlates are associated with neuropathological processes underlying the disease or if they are confounded by medication. Given that NSS are also present in healthy persons (HP), investigating HP could reveal NSS correlates, which are not biased by disease-specific processes or drug treatment. Therefore, we used a combination of diffusion MRI analysis tools to provide a framework of specific white matter (WM) microstructure variations underlying NSS in HP...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28429407/spinal-cord-injury-induces-widespread-chronic-changes-in-cerebral-white-matter
#18
Tero Ilvesmäki, Eerika Koskinen, Antti Brander, Teemu Luoto, Juha Öhman, Hannu Eskola
Traumatic spinal cord injuries (SCIs) lead to axonal damage at the trauma site, as well as disconnections within the central nervous system. While the exact mechanisms of the long-term pathophysiological consequences of SCIs are not fully understood, it is known that neuronal damage and degeneration are not limited to the direct proximity of the trauma. Instead, the effects can be detected even in the cerebrum. We examined SCI-induced chronic brain changes with a case-control design using 32 patients and 70 control subjects...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28420955/hemispheric-differences-in-white-matter-microstructure-between-two-profiles-of-children-with-high-intelligence-quotient-vs-controls-a-tract-based-spatial-statistics-study
#19
Fanny Nusbaum, Salem Hannoun, Gabriel Kocevar, Claudio Stamile, Pierre Fourneret, Olivier Revol, Dominique Sappey-Marinier
Objectives: The main goal of this study was to investigate and compare the neural substrate of two children's profiles of high intelligence quotient (HIQ). Methods: Two groups of HIQ children were included with either a homogeneous (Hom-HIQ: n = 20) or a heterogeneous IQ profile (Het-HIQ: n = 24) as defined by a significant difference between verbal comprehension index and perceptual reasoning index. Diffusion tensor imaging was used to assess white matter (WM) microstructure while tract-based spatial statistics (TBSS) analysis was performed to detect and localize WM regional differences in fractional anisotropy (FA), mean diffusivity, axial (AD), and radial diffusivities...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28385492/reduced-white-matter-integrity-and-facial-emotion-perception-in-never-medicated-patients-with-first-episode-schizophrenia-a-diffusion-tensor-imaging-study
#20
Xiaoxin Zhao, Yuxiu Sui, Jingjing Yao, Yiding Lv, Xinyue Zhang, Zhuma Jin, Lijun Chen, Xiangrong Zhang
BACKGROUND: Facial emotion perception is impaired in schizophrenia. Although the pathology of schizophrenia is thought to involve abnormality in white matter (WM), few studies have examined the correlation between facial emotion perception and WM abnormalities in never-medicated patients with first-episode schizophrenia. The present study tested associations between facial emotion perception and WM integrity in order to investigate the neural basis of impaired facial emotion perception in schizophrenia...
April 4, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
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