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https://www.readbyqxmd.com/read/28445282/a-case-report-of-sj%C3%A3-gren-syndrome-manifesting-bilateral-basal-ganglia-lesions
#1
Bing Niu, Zhenzhen Zou, Yuqin Shen, Bingzhen Cao
RATIONALE: Peripheral neurological complications in primary Sjögren's syndrome (pSS) seem the most common, however the involvement of central nervous system (CNS) remains unclear. While abnormalities in pSS revealed by brain magnetic resonance imaging (MRI) are usually small discrete hyperintense areas in the white matter on T2-FLAIR weighted MRI, massive brain lesions have been rarely reported, particularly in bilateral basal ganglia. PATIENT CONCERNS: A 51-year-old woman exhibited dizziness, slurred speech and hemiplegia as a manifestation of pSS...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28445276/correlation-between-prefrontal-striatal-pathway-impairment-and-cognitive-impairment-in-patients-with-leukoaraiosis
#2
Shuangkun Wang, Junliang Yuan, Xiaojuan Guo, Leilei Teng, Hua Jiang, Hua Gu, Wenli Hu, Tao Jiang
Our study aimed to investigate the changes of white matter microstructure of cortico-subcortical pathways using diffusion tensor imaging (DTI), and to explore the relationship between abnormal parameters of DTI and cognitive function underlying in patients with leukoaraiosis (LA).A total of 42 patients with LA and 42 age- and sex-matched healthy controls were recruited from Beijing Chaoyang Hospital, Capital Medical University between January 2012 and December 2012. All the subjects underwent scans of conventional magnetic resonance imaging and DTI, and a comprehensive neuropsychological battery was utilized...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28442356/unbiased-stereological-analysis-of-the-fate-of-oligodendrocyte-progenitor-cells-in-the-adult-mouse-brain-and-effect-of-reference-memory-training
#3
Jenna J Boulanger, Claude Messier
Oligodendrocyte progenitor cells (OPC) are glial cells that differentiate into myelinating oligodendrocytes during early stages of post-natal life. However, OPCs persist beyond developmental myelination and represent an important population of cycling cells in the grey and white matter of the adult brain. Here, we used unbiased systematic stereological analysis to determine the total number of OPCs in the neocortex and corpus callosum of the adult mouse. We found that the ratio of OPCs to neurons is of 1: 10 in the adult neocortex...
April 22, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28441825/-progressive-cavitating-leukoencephalopathy-four-cases-and-literatures-review
#4
C H Ren, F Fang, H Cheng, C H Ding, C H Chen, Y J Zhang, D M Shen
Objective: To analyze the clinical and genetic features of progressive cavitating leukoencephalopathy (PCL). Method: The data of clinical and genetic features of 4 PCL patients diagnosed by Beijing Children's Hospital between January 2015 and January 2016 were analyzed. The cases with complete clinical data retrieved on literature search at China National Knowledge Infrastructure, Wanfang Data Knowledge Service Platform and PubMed (up to August 2016) by using search terms of"NDUFV1" ,"NDUFS1" , or"leukoencephalopathy" , were summarized...
April 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28440867/the-epileptology-of-koolen-de-vries-syndrome-electro-clinico-radiologic-findings-in-31-patients
#5
Kenneth A Myers, Simone A Mandelstam, Georgia Ramantani, Elisabeth J Rushing, Bert B de Vries, David A Koolen, Ingrid E Scheffer
OBJECTIVE: This study was designed to describe the spectrum of epilepsy phenotypes in Koolen-de Vries syndrome (KdVS), a genetic syndrome involving dysmorphic features, intellectual disability, hypotonia, and congenital malformations, that occurs secondary to 17q21.31 microdeletions and heterozygous mutations in KANSL1. METHODS: We were invited to attend a large gathering of individuals with KdVS and their families. While there, we recruited individuals with KdVS and seizures, and performed thorough phenotyping...
April 25, 2017: Epilepsia
https://www.readbyqxmd.com/read/28440857/the-anterior-complex-a-visual-mnemonic-to-aid-in-identification-of-normal-structures
#6
Angela C Ranzini
The anterior complex of the fetal brain is a group of structures that are important to evaluate during the routine anatomic survey to exclude several serious brain malformations. These structures include the cavum septum pellucidum, anterior horns, interhemispheric fissure, callosal sulcus, and corpus callosum. The relationship between these structures is easily remembered with the presented visual cartoon. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound, 2017.
April 25, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28440815/15q11-2-cnv-affects-cognitive-structural-and-functional-correlates-of-dyslexia-and-dyscalculia
#7
M O Ulfarsson, G B Walters, O Gustafsson, S Steinberg, A Silva, O M Doyle, M Brammer, D F Gudbjartsson, S Arnarsdottir, G A Jonsdottir, R S Gisladottir, G Bjornsdottir, H Helgason, L M Ellingsen, J G Halldorsson, E Saemundsen, B Stefansdottir, L Jonsson, V K Eiriksdottir, G R Eiriksdottir, G H Johannesdottir, U Unnsteinsdottir, B Jonsdottir, B B Magnusdottir, P Sulem, U Thorsteinsdottir, E Sigurdsson, D Brandeis, A Meyer-Lindenberg, H Stefansson, K Stefansson
Several copy number variants have been associated with neuropsychiatric disorders and these variants have been shown to also influence cognitive abilities in carriers unaffected by psychiatric disorders. Previously, we associated the 15q11.2(BP1-BP2) deletion with specific learning disabilities and a larger corpus callosum. Here we investigate, in a much larger sample, the effect of the 15q11.2(BP1-BP2) deletion on cognitive, structural and functional correlates of dyslexia and dyscalculia. We report that the deletion confers greatest risk of the combined phenotype of dyslexia and dyscalculia...
April 25, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28439672/altered-intra-and-interregional-synchronization-in-the-absence-of-the-corpus-callosum-a-resting-state-fmri-study
#8
Long Zuo, Shuangkun Wang, Junliang Yuan, Hua Gu, Yang Zhou, Tao Jiang
Agenesis of the corpus callosum (AgCC) can result in subtle to severe cognitive deficits. Individuals with impaired cognition often show abnormalities on resting-state functional magnetic resonance imaging (rs-fMRI). This study used rs-fMRI to investigate changes in regional homogeneity (ReHo) and functional connectivity (FC) among individuals with AgCC. AgCC individuals (n = 10) and age-, sex-, and education-matched healthy control subjects (n = 19) were included in this study. The ReHo values were calculated to represent spontaneous brain activity...
April 24, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28438714/the-effect-of-morphological-and-microstructural-integrity-of-the-corpus-callosum-on-cognition-fatigue-and-depression-in-mildly-disabled-ms-patients
#9
Jeroen Van Schependom, Jeroen Gielen, Jorne Laton, Georgios Sotiropoulos, Anne-Marie Vanbinst, Johan De Mey, Dirk Smeets, Guy Nagels
Aim To assess the value of callosal morphological and microstructural integrity in assessing different cognitive domains, fatigue and depression in mildly disabled multiple sclerosis (MS) patients. MATERIALS AND METHODS: We assessed 29 mildly disabled MS patients and 15 healthy controls using 3T magnetic resonance images (T1-weighted, FLAIR and DTI) and neuropsychological tests assessing different cognitive functions, depression and fatigue. We compared the added value of morphological measures (corpus callosum area corrected for total intracranial volume, index, circularity and the more detailed thickness profile) and diffusion features (fractional anisotropy and mean diffusivity) in multilinear models including standard clinical and whole-brain parameters in assessing neuropsychological scores...
April 21, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28436607/visual-complaints-in-intracranial-germinomas
#10
Didier Frappaz, Claire Pedone, Philippe Thiesse, Alexandru Szathmari, Cécile Faure Conter, Carmine Mottolese, Christian Carrie
OBJECTIVE: Patients with brain tumors often report having visual complaints. This may be due to increased intracranial pressure, compression/invasion of the optic pathway or diplopia. We assessed the incidence and the etiology of visual symptoms in patients with intracranial germinoma tumors (ICGTs). METHODS AND MATERIALS: We performed a blinded retrospective review of the clinical charts and the initial magnetic resonance imaging (MRI) of 28 patients with ICGT...
April 24, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28436562/anatomical-subgroup-analysis-of-the-meridian-cohort-failed-commissuration
#11
Paul D Griffiths, Karen Brackley, Michael Bradburn, Daniel Ja Connolly, Mary L Gawne-Cain, Daniel I Griffiths, Mark D Kilby, Laura Mandefield, Cara Mooney, Stephen C Robson, Brigitte Vollmer, Gerald Mason
OBJECTIVE: To assess the contribution of in utero magnetic resonance (iuMR) imaging in fetuses diagnosed with either agenesis of the corpus callosum or hypogenesis of the corpus callosum (grouped as failed commissuration) on antenatal ultrasonography (USS) from the MERIDIAN cohort. METHODS: We report a sub-group analysis of fetuses with failed commissuration diagnosed on USS (with or without ventriculomegaly) from the MERIDIAN study who had iuMR imaging within 2 weeks of USS and outcome reference data were available...
April 24, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28436460/histological-validation-of-fast-macromolecular-proton-fraction-mapping-as-a-quantitative-myelin-imaging-method-in-the-cuprizone-demyelination-model
#12
Marina Yu Khodanovich, Irina V Sorokina, Valentina Yu Glazacheva, Andrey E Akulov, Nikolay M Nemirovich-Danchenko, Alexander V Romashchenko, Tatyana G Tolstikova, Lilia R Mustafina, Vasily L Yarnykh
Cuprizone-induced demyelination in mice is a frequently used model in preclinical multiple sclerosis research. A recent quantitative clinically-targeted MRI method, fast macromolecular proton fraction (MPF) mapping demonstrated a promise as a myelin biomarker in human and animal studies with a particular advantage of sensitivity to both white matter (WM) and gray matter (GM) demyelination. This study aimed to histologically validate the capability of MPF mapping to quantify myelin loss in brain tissues using the cuprizone demyelination model...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28434994/transient-upregulation-of-nav1-6-expression-in-the-genu-of-corpus-callosum-following-middle-cerebral-artery-occlusion-in-the-rats
#13
Hongyan Zhu, Weide Lin, Yuxiao Zhao, Ziyi Wang, Wenwen Lao, Ping Kuang, Houguang Zhou
Focal ischemic stroke can lead to brain damage and cause human disability and death. Increased excitatory transmission and reduced neuronal inhibition are important pathological alterations in the cerebral ischemia, which can induce abnormal brain excitability. Nav1.6 is a key determinant of neuronal excitability in the nervous system. Here we investigate the expression of Nav1.6 at protein and mRNA levels in the rats subjected to middle cerebral artery occlusion (MCAO).Nav1.6 expression at mRNA levels in the ischemic and contralateral hemispheres of MCAO rats were persistently decreased at 6h, 12h and 24h after reperfusion compared to the sham-operated rats...
April 20, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28433113/wilson-disease-brain-pathology
#14
Aurélia Poujois, Jacqueline Mikol, France Woimant
In Wilson disease (WD), brain cellular damage is thought to be due to copper deposition. Striatal lesions are the most characteristic lesions found in the brain of patients with neurologic symptoms, as emphasized in the initial reports of S.A.K. Wilson. WD brain lesions can be more diffuse, including in the pons, midbrain, thalamus, dentate nucleus, and, less frequently, corpus callosum and cortex. In rare cases, extensive cortical-subcortical lesions have been reported. Increased cellularity is noted in the lesions due to the proliferation of modified astrocytes named Alzheimer types of glia and specific cells, called Opalski cells, that are characteristic of WD...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28431605/global-brain-atrophy-and-metabolic-dysfunction-in-lgi1-encephalitis-a-prospective-multimodal-mri-study
#15
Monika Szots, Morten Blaabjerg, Gergely Orsi, Pernille Iversen, Daniel Kondziella, Camilla G Madsen, Ellen Garde, Peter O Magnusson, Peter Barsi, Ferenc Nagy, Hartwig R Siebner, Zsolt Illes
BACKGROUND: Chronic cognitive deficits are frequent in leucin-rich glioma-inactivated 1 protein (LGI1) encephalitis. We examined structural and metabolic brain abnormalities following LGI1 encephalitis and correlated findings with acute and follow-up clinical outcomes. METHODS: Nine patients underwent prospective multimodal 3 Tesla MRI 33.1±18months after disease onset, including automated volumetry, diffusion tensor imaging (DTI) and magnetic resonance spectroscopy (MRS)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28431033/emotional-intelligence-in-agenesis-of-the-corpus-callosum
#16
Luke B Anderson, Lynn K Paul, Warren S Brown
People with agenesis of the corpus callosum (AgCC) with normal general intelligence have deficits in complex cognitive processing, as well as in social cognition. It is uncertain the extent to which impoverished processing of emotions may contribute to social processing deficiencies. We used the Mayer-Salovey-Caruso Emotional Intelligence Test to clarify the nature of emotional intelligence in 16 adults with AgCC. As hypothesized, persons with AgCC exhibited greater disparities from norms on tests involving more socially complex aspects of emotions...
May 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
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/28425061/gray-matter-and-white-matter-changes-in-non-demented-amyotrophic-lateral-sclerosis-patients-with-or-without-cognitive-impairment-a-combined-voxel-based-morphometry-and-tract-based-spatial-statistics-whole-brain-analysis
#18
Foteini Christidi, Efstratios Karavasilis, Franz Riederer, Ioannis Zalonis, Panagiotis Ferentinos, Georgios Velonakis, Sophia Xirou, Michalis Rentzos, Georgios Argiropoulos, Vasiliki Zouvelou, Thomas Zambelis, Athanasios Athanasakos, Panagiotis Toulas, Konstantinos Vadikolias, Efstathios Efstathopoulos, Spyros Kollias, Nikolaos Karandreas, Nikolaos Kelekis, Ioannis Evdokimidis
The phenotypic heterogeneity in amyotrophic lateral sclerosis (ALS) implies that patients show structural changes within but also beyond the motor cortex and corticospinal tract and furthermore outside the frontal lobes, even if frank dementia is not detected. The aim of the present study was to investigate both gray matter (GM) and white matter (WM) changes in non-demented amyotrophic lateral sclerosis (ALS) patients with or without cognitive impairment (ALS-motor and ALS-plus, respectively). Nineteen ALS-motor, 31 ALS-plus and 25 healthy controls (HC) underwent 3D-T1-weighted and 30-directional diffusion-weighted imaging on a 3 T MRI scanner...
April 19, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28424397/-spatial-cognition-and-episodic-memory-formation-in-the-limbic-cortex
#19
Yasushi Kobayashi
The limbic lobe defined by Broca is a cortical region with highly diverse structure and functions, and comprises the paleo-, archi-, and neocortices as well as their transitional zones. In the limbic lobe, Brodmann designated areas 27, 28, 34, 35, and 36 adjacent to the hippocampus, and areas 23, 24, 25, 26, 29, 30, 31, 32, and 33 around the corpus callosum. In the current literature, areas 27 and 28 correspond to the presubiculum and entorhinal cortex, respectively. Area 34 represents the cortico-medial part of the amygdaloid complex...
April 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28422761/topological-length-of-white-matter-connections-predicts-their-rate-of-atrophy-in-premanifest-huntington-s-disease
#20
Peter McColgan, Kiran K Seunarine, Sarah Gregory, Adeel Razi, Marina Papoutsi, Jeffrey D Long, James A Mills, Eileanoir Johnson, Alexandra Durr, Raymund A C Roos, Blair R Leavitt, Julie C Stout, Rachael I Scahill, Chris A Clark, Geraint Rees, Sarah J Tabrizi, The Track-On Hd Investigators
We lack a mechanistic explanation for the stereotyped pattern of white matter loss seen in Huntington's disease (HD). While the earliest white matter changes are seen around the striatum, within the corpus callosum, and in the posterior white matter tracts, the order in which these changes occur and why these white matter connections are specifically vulnerable is unclear. Here, we use diffusion tractography in a longitudinal cohort of individuals yet to develop clinical symptoms of HD to identify a hierarchy of vulnerability, where the topological length of white matter connections between a brain area and its neighbors predicts the rate of atrophy over 24 months...
April 20, 2017: JCI Insight
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