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Corpus callosum development

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https://www.readbyqxmd.com/read/27918912/predicting-cyp2d6-phenotype-from-resting-brain-perfusion-images-by-gradient-boosting
#1
Giulio Napolitano, Julia C Stingl, Matthias Schmid, Roberto Viviani
The cytochrome P450 enzyme 2D6 is involved in the metabolism of 20% of all commonly used drugs, including many psychotropic drugs and CNS-active substances. CYP2D6 is among the CYP enzymes with the highest expression levels in the brain, suggesting a role in the local brain metabolism of psychotropic drugs and the existence of endogenous substrates. The genetic polymorphism of CYP2D6, which causes individual differences in activity levels of the enzyme, has also been characterized functionally in human brain imaging studies...
November 22, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27913589/integrin-linked-kinase-ilk-deletion-disrupts-oligodendrocyte-development-by-altering-cell-cycle
#2
Rashad Hussain, Wendy B Macklin
: During development, oligodendrocytes are initially specified, after which oligodendrocyte precursor cells (OPCs) migrate and proliferate before differentiating into myelinating cells. Lineage specific programming of oligodendrocytes results from sensing environmental cues through membrane-bound receptors and related intracellular signaling molecules. Integrin linked kinase (ILK) is an important protein expressed at the inner margins of the plasma membrane, which can mediate some of these signals...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27907080/development-of-an-automated-mri-based-diagnostic-protocol-for-amyotrophic-lateral-sclerosis-using-disease-specific-pathognomonic-features-a-quantitative-disease-state-classification-study
#3
Christina Schuster, Orla Hardiman, Peter Bede
BACKGROUND: Despite significant advances in quantitative neuroimaging, the diagnosis of ALS remains clinical and MRI-based biomarkers are not currently used to aid the diagnosis. The objective of this study is to develop a robust, disease-specific, multimodal classification protocol and validate its diagnostic accuracy in independent, early-stage and follow-up data sets. METHODS: 147 participants (81 ALS patients and 66 healthy controls) were divided into a training sample and a validation sample...
2016: PloS One
https://www.readbyqxmd.com/read/27906083/neonatal-diffusion-tensor-brain-imaging-predicts-later-motor-outcome-in-preterm-neonates-with-white-matter-abnormalities
#4
Do-Yeon Kim, Hyun-Kyung Park, Nam-Su Kim, Se-Jin Hwang, Hyun Ju Lee
BACKGROUND: White matter (WM) abnormalities associated with prematurity are one of the most important causes of neurological disability that involves spastic motor deficits in preterm newborns. This study aimed to evaluate regional microstructural changes in diffusion tensor imaging (DTI) associated with WM abnormalities. METHODS: We prospectively studied extremely low birth weight (ELBW; <1000 g) preterm infants who were admitted to the Neonatal Intensive Care Unit of Hanyang University Hospital between February 2011 and February 2014...
December 1, 2016: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/27904491/intravenous-transplantation-of-mouse-embryonic-stem-cells-attenuates-demyelination-in-an-icr-outbred-mouse-model-of-demyelinating-diseases
#5
Kidsadagon Pringproa, Anucha Sathanawongs, Chananthida Khamphilai, Sarocha Sukkarinprom, Apichart Oranratnachai
Induction of demyelination in the central nervous system (CNS) of experimental mice using cuprizone is widely used as an animal model for studying the pathogenesis and treatment of demyelination. However, different mouse strains used result in different pathological outcomes. Moreover, because current medicinal treatments are not always effective in multiple sclerosis patients, so the study of exogenous cell transplantation in an animal model is of great importance. The aims of the present study were to establish an alternative ICR outbred mouse model for studying demyelination and to evaluate the effects of intravenous cell transplantation in the present developed mouse model...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27889838/changes-of-brain-metabolite-concentrations-during-maturation-in-different-brain-regions-measured-by-chemical-shift-imaging
#6
Eva Bültmann, Thomas Nägele, Heinrich Lanfermann, Uwe Klose
INTRODUCTION: We examined the effect of maturation on the regional distribution of brain metabolite concentrations using multivoxel chemical shift imaging. METHODS: From our pool of pediatric MRI examinations, we retrospectively selected patients showing a normal cerebral MRI scan or no pathologic signal abnormalities at the level of the two-dimensional 1H MRS-CSI sequence and an age-appropriate global neurological development, except for focal neurological deficits...
November 26, 2016: Neuroradiology
https://www.readbyqxmd.com/read/27870421/multimodal-neuroimaging-of-male-and-female-brain-structure-in-health-and-disease-across-the-life-span
#7
REVIEW
Neda Jahanshad, Paul M Thompson
Sex differences in brain development and aging are important to identify, as they may help to understand risk factors and outcomes in brain disorders that are more prevalent in one sex compared with the other. Brain imaging techniques have advanced rapidly in recent years, yielding detailed structural and functional maps of the living brain. Even so, studies are often limited in sample size, and inconsistent findings emerge, one example being varying findings regarding sex differences in the size of the corpus callosum...
January 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27866083/neuroanatomical-differences-in-fast-and-slow-rat-strains-with-differential-vulnerability-to-kindling-and-behavioral-comorbidities
#8
Pragati Sharma, Stefanie Dedeurwaerdere, Michael A D Vandenberg, Ke Fang, Leigh A Johnston, Sandy R Shultz, Terence J O'Brien, Krista L Gilby
OBJECTIVE: The neurobiological factors underlying a predisposition towards developing epilepsy and its common behavioral comorbidities are poorly understood. FAST rats are a strain that has been selectively bred for enhanced vulnerability to kindling, while the SLOW strain has been bred to be resistant to kindling. FAST rats also exhibit behavioral traits reminiscent of those observed in neurodevelopmental disorders (autism spectrum disorder (ASD)/attention-deficit/hyperactivity disorder (ADHD)) commonly comorbid with epilepsy...
November 17, 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27865819/buzz-juice-neurological-sequelae-of-synthetic-cannabinoids
#9
Manisha Kak, Fadi Mikhail, Sho T Yano, Rui Guan, Rimas V Lukas
The use of synthetic cannabinoids is becoming more widespread. Familiarity with the potential toxicities associated with these agents will grow in importance. We present a case of a woman who developed onset of confusion, visual hallucinations, and ataxia after vaporizing synthetic cannabinoids. MRI imaging demonstrated restricted diffusion and increased T2/FLAIR signal in the corpus callosum and cerebellar peduncles.
November 16, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27859928/microstructural-changes-of-brain-in-patients-with-aromatic-l-amino-acid-decarboxylase-deficiency
#10
Wang-Tso Lee, Jui-Hsiang Lin, Wen-Chin Weng, Steven Shinn-Forng Peng
Aromatic L-amino acid decarboxylase (AADC) deficiency is an uncommon inherited neurometabolic disease. The clinical presentations and MR findings in children with AADC deficiency were investigated. Total 12 children (6 boys, 6 girls), aged from 9 to 50 months (mean, 23 ±13 months), with AADC deficiency, were enrolled for analysis. Of 12 patients enrolled, clinical presentations included global developmental delay with generalized hypotonia in 12 (100%), dystonia in 12 (100%), oculogyric crisis in 12 (100%), and excessive sweating in 8 (67%)...
November 17, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27857787/a-study-of-neurosonogram-abnormalities-clinical-correlation-with-neurosonogram-findings-and-immediate-outcome-of-high-risk-neonates-in-neonatal-intensive-care-unit
#11
Niranjan Nagaraj, Pramod Kumar Berwal, Anusha Srinivas, Ramnarayan Sehra, Sarika Swami, Prathyusha Jeevaji, Gotam Swami, Lokesh Choudary, Ayush Berwal
BACKGROUND: Neonatal sonography of the brain is now an essential part of newborn care, particularly in high risk and unstable premature infants. Cranial ultrasound is the most available and easily repeatable imaging technique for the neonatal brain showing brain development and the most frequently occurring forms of cerebral injury in the preterm and terms. This study aims to assess the importance of cranial ultrasound as an investigatory modality for high-risk neonates and to find out the morphology of various cerebral lesions and correlate clinically...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27853083/reversible-cerebral-vasoconstriction-syndrome-with-transient-splenial-lesions-after-delivery
#12
Akiyuki Hiraga, Kyosuke Koide, Yuya Aotsuka, Satoshi Kuwabara
Reversible cerebral vasoconstriction syndrome (RCVS) is characterized by segmental vasospasm and it is often accompanied by either posterior reversible encephalopathy syndrome or stroke. However, other MRI abnormalities have rarely been reported. A 28-year-old woman presented with a thunderclap headache immediately after delivery; MRI showed segmental vasoconstriction and an abnormal signal in the splenium of the corpus callosum. Neuroimaging abnormalities normalized 20 days after the first examination. Only two cases of RCVS with transient splenial lesions (TSL) have so far been reported...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27853020/progressive-susac-syndrome-with-bilateral-visual-loss-and-disability
#13
Morteza Entezari, Saeed Karimi, Mohammadali Feizi
Susac syndrome (SS) is a rare retinal-cochlear-cerebral disease with an unclear etiology. A 35-year-old man presented with sudden painless vision loss in the right eye and 2 months later in the left eye with hemiparesis, behavioral changes, and hearing loss. Ophthalmic examinations revealed multiple branch retinal artery occlusions (BRAOs) in both eyes. Brain magnetic resonance imaging showed inflammatory changes with multiple "punched-out" lesions in the corpus callosum which confirmed the diagnosis of SS...
September 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27836006/mycoplasma-pneumoniae-associated-mild-encephalitis-encephalopathy-with-a-reversible-splenial-lesion-report-of-two-pediatric-cases-and-a-comprehensive-literature-review
#14
Norishi Ueda, Satoshi Minami, Manabu Akimoto
BACKGROUND: No literature review exists on Mycoplasma pneumoniae-associated mild encephalitis/encepharopathy with a reversible splenial lesion (MERS). METHODS: M.pneumoniae-associated MERS cases were searched till August 2016 using PubMed/Google for English/other-language publications and Ichushi ( http://www.jamas.or.jp/ ) for Japanese-language publications. Inclusion criteria were children fulfilling definition for encephalitis, M.pneumoniae infection, and neuroimaging showing hyperintensity in the splenium of the corpus callosum (SCC) alone (type I) or SCC/other brain areas (type II)...
November 11, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27831545/neuroimaging-findings-in-mowat-wilson-syndrome-a-study-of-54-patients
#15
Livia Garavelli, Ivan Ivanovski, Stefano Giuseppe Caraffi, Daniela Santodirocco, Marzia Pollazzon, Duccio Maria Cordelli, Ebtesam Abdalla, Patrizia Accorsi, Margaret P Adam, Chiara Baldo, Allan Bayat, Elga Belligni, Federico Bonvicini, Jeroen Breckpot, Bert Callewaert, Guido Cocchi, Goran Cuturilo, Koenraad Devriendt, Mary Beth Dinulos, Olivera Djuric, Roberta Epifanio, Francesca Faravelli, Debora Formisano, Lucio Giordano, Marina Grasso, Sabine Grønborg, Alessandro Iodice, Lorenzo Iughetti, Didier Lacombe, Massimo Maggi, Baris Malbora, Isabella Mammi, Sebastien Moutton, Rikke Møller, Petra Muschke, Manuela Napoli, Chiara Pantaleoni, Rosario Pascarella, Alessandro Pellicciari, Maria Luisa Poch-Olive, Federico Raviglione, Francesca Rivieri, Carmela Russo, Salvatore Savasta, Gioacchino Scarano, Angelo Selicorni, Margherita Silengo, Giovanni Sorge, Luigi Tarani, Luis Gonzaga Tone, Annick Toutain, Aurelien Trimouille, Elvis Terci Valera, Samantha Schrier Vergano, Nicoletta Zanotta, Marcella Zollino, William B Dobyns, Alex R Paciorkowski
PURPOSE: Mowat-Wilson syndrome (MWS) is a genetic disease characterized by distinctive facial features, moderate to severe intellectual disability, and congenital malformations, including Hirschsprung disease, genital and eye anomalies, and congenital heart defects, caused by haploinsufficiency of the ZEB2 gene. To date, no characteristic pattern of brain dysmorphology in MWS has been defined. METHODS: Through brain magnetic resonance imaging (MRI) analysis, we delineated a neuroimaging phenotype in 54 MWS patients with a proven ZEB2 defect, compared it with the features identified in a thorough review of published cases, and evaluated genotype-phenotype correlations...
November 10, 2016: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/27807845/microcephaly-intractable-seizures-and-developmental-delay-caused-by-biallelic-variants-in-tbcd-further-delineation-of-a-new-chaperone-mediated-tubulinopathy
#16
Ben Pode-Shakked, Hila Barash, Limor Ziv, Karen W Gripp, Elisabetta Flex, Ortal Barel, Karen S Carvalho, Mena Scavina, Giovanni Chillemi, Marcello Niceta, Eran Eyal, Nitzan Kol, Bruria Ben-Zeev, Omer Bar-Yosef, Dina Marek-Yagel, Enrico Bertini, Angela L Duker, Yair Anikster, Marco Tartaglia, Annick Raas-Rothschild
Microtubule dynamics play a crucial role in neuronal development and function, and several neurodevelopmental disorders have been linked to mutations in genes encoding tubulins and functionally related proteins. Most recently, variants in the tubulin cofactor D (TBCD) gene, which encodes one of the five co-chaperones required for assembly and disassembly of α/β-tubulin heterodimer, were reported to underlie a recessive neurodevelopmental/neurodegenerative disorder. We report on five patients from three unrelated families, who presented with microcephaly, intellectual disability, intractable seizures, optic nerve pallor/atrophy, and cortical atrophy with delayed myelination and thinned corpus callosum on brain imaging...
November 2, 2016: Clinical Genetics
https://www.readbyqxmd.com/read/27798752/structural-brain-alterations-of-down-s-syndrome-in-early-childhood-evaluation-by-dti-and-volumetric-analyses
#17
Hediye Pınar Gunbey, Meltem Ceyhan Bilgici, Kerim Aslan, Arzu Ceylan Has, Methiye Gonul Ogur, Aslıhan Alhan, Lutfi Incesu
OBJECTIVES: To provide an initial assessment of white matter (WM) integrity with diffusion tensor imaging (DTI) and the accompanying volumetric changes in WM and grey matter (GM) through volumetric analyses of young children with Down's syndrome (DS). METHODS: Ten children with DS and eight healthy control subjects were included in the study. Tract-based spatial statistics (TBSS) were used in the DTI study for whole-brain voxelwise analysis of fractional anisotropy (FA) and mean diffusivity (MD) of WM...
October 31, 2016: European Radiology
https://www.readbyqxmd.com/read/27798140/conditional-deletion-of-the-l-type-calcium-channel-cav1-2-in-oligodendrocyte-progenitor-cells-affects-postnatal-myelination-in-mice
#18
Veronica T Cheli, Diara A Santiago González, Tenzing Namgyal Lama, Vilma Spreuer, Vance Handley, Geoffrey G Murphy, Pablo M Paez
: To determine whether L-type voltage-operated Ca(2+) channels (L-VOCCs) are required for oligodendrocyte progenitor cell (OPC) development, we generated an inducible conditional knock-out mouse in which the L-VOCC isoform Cav1.2 was postnatally deleted in NG2-positive OPCs. A significant hypomyelination was found in the brains of the Cav1.2 conditional knock-out (Cav1.2(KO)) mice specifically when the Cav1.2 deletion was induced in OPCs during the first 2 postnatal weeks. A decrease in myelin proteins expression was visible in several brain structures, including the corpus callosum, cortex, and striatum, and the corpus callosum of Cav1...
October 19, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27789448/white-matter-injury-and-general-movements-in-high-risk-preterm-infants
#19
C Peyton, E Yang, M E Msall, L Adde, R Støen, T Fjørtoft, A F Bos, C Einspieler, Y Zhou, M D Schreiber, J D Marks, A Drobyshevsky
BACKGROUND AND PURPOSE: Very preterm infants (birth weight, <1500 g) are at increased risk of cognitive and motor impairment, including cerebral palsy. These adverse neurodevelopmental outcomes are associated with white matter abnormalities on MR imaging at term-equivalent age. Cerebral palsy has been predicted by analysis of spontaneous movements in the infant termed "General Movement Assessment." The goal of this study was to determine the utility of General Movement Assessment in predicting adverse cognitive, language, and motor outcomes in very preterm infants and to identify brain imaging markers associated with both adverse outcomes and aberrant general movements...
October 27, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27785640/can-mri-t1-be-used-to-detect-early-changes-in-5xfad-alzheimer-s-mouse-brain
#20
Nicholas G Spencer, David P Lovell, Kay Elderfield, Brian Austen, Franklyn A Howe
OBJECTIVES: In the present study, we have tested whether MRI T1 relaxation time is a sensitive marker to detect early stages of amyloidosis and gliosis in the young 5xFAD transgenic mouse, a well-established animal model for Alzheimer's disease. MATERIALS AND METHODS: 5xFAD and wild-type mice were imaged in a 4.7 T Varian horizontal bore MRI system to generate T1 quantitative maps using the spin-echo multi-slice sequence. Following immunostaining for glial fibrillary acidic protein, Iba-1, and amyloid-β, T1 and area fraction of staining were quantified in the posterior parietal and primary somatosensory cortex and corpus callosum...
October 26, 2016: Magma
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