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White matter

Abdulkadir Tunç, Belma Doğan Güngen, Ferhat Evliyaoğlu, Yeşim Güzey Aras, Aysel Kaya Tekeşin
The aim of this study was to investigate retinal nerve fiber layer (RNFL), ganglion cell layer (GCL) thickness, macular changes (central subfield thickness (CST), cube average thickness (CAT), cube volume (CV) in patients with migraine using spectral-domain optical coherence tomography (OCT) and to assess if there was any correlation with white matter lesions (WML). In this prospective case-control study, RNFL, GCL thickness and macular changes of 19 migraine patients with aura (MA), 41 migraine without aura (MO) and 60 age- and gender-matched healthy subjects were measured using OCT device...
October 21, 2016: Acta Neurologica Belgica
Yuichi Nishiyama, Hidekazu Kanayama, Hiroshi Mori, Keiji Tada, Yasushi Yamamoto, Takashi Katsube, Haruo Takeshita, Kazunori Kawakami, Hajime Kitagaki
OBJECTIVES: This study examined the usefulness of statistical parametric mapping (SPM) for investigating postmortem changes on brain computed tomography (CT). METHODS: This retrospective study included 128 patients (23 - 100 years old) without cerebral abnormalities who underwent unenhanced brain CT before and after death. The antemortem CT (AMCT) scans and postmortem CT (PMCT) scans were spatially normalized using our original brain CT template, and postmortem changes of CT values (in Hounsfield units; HU) were analysed by the SPM technique...
October 21, 2016: European Radiology
Swarupa Kancherla, William J Kohler, Yolandi van der Merwe, Kevin C Chan
Visual function has been shown to deteriorate prior to the onset of retinopathy in some diabetic patients and experimental animal models. This suggests the involvement of the brain's visual system in the early stages of diabetes. In this study, we tested this hypothesis by examining the integrity of the visual pathway in a diabetic rat model using in vivo multi-modal magnetic resonance imaging (MRI). Ten-week-old Sprague-Dawley rats were divided into an experimental diabetic group by intraperitoneal injection of 65 mg/kg streptozotocin in 0...
2016: PloS One
H Abdalla, A Abramowski, F Aharonian, F Ait Benkhali, A G Akhperjanian, T Andersson, E O Angüner, M Arrieta, P Aubert, M Backes, A Balzer, M Barnard, Y Becherini, J Becker Tjus, D Berge, S Bernhard, K Bernlöhr, E Birsin, R Blackwell, M Böttcher, C Boisson, J Bolmont, P Bordas, J Bregeon, F Brun, P Brun, M Bryan, T Bulik, M Capasso, J Carr, S Casanova, N Chakraborty, R Chalme-Calvet, R C G Chaves, A Chen, J Chevalier, M Chrétien, S Colafrancesco, G Cologna, B Condon, J Conrad, C Couturier, Y Cui, I D Davids, B Degrange, C Deil, J Devin, P deWilt, A Djannati-Ataï, W Domainko, A Donath, L O'C Drury, G Dubus, K Dutson, J Dyks, M Dyrda, T Edwards, K Egberts, P Eger, J-P Ernenwein, S Eschbach, C Farnier, S Fegan, M V Fernandes, A Fiasson, G Fontaine, A Förster, S Funk, M Füßling, S Gabici, M Gajdus, Y A Gallant, T Garrigoux, G Giavitto, B Giebels, J F Glicenstein, D Gottschall, A Goyal, M-H Grondin, M Grudzińska, D Hadasch, J Hahn, J Hawkes, G Heinzelmann, G Henri, G Hermann, O Hervet, A Hillert, J A Hinton, W Hofmann, C Hoischen, M Holler, D Horns, A Ivascenko, A Jacholkowska, M Jamrozy, M Janiak, D Jankowsky, F Jankowsky, M Jingo, T Jogler, L Jouvin, I Jung-Richardt, M A Kastendieck, K Katarzyński, U Katz, D Kerszberg, B Khélifi, M Kieffer, J King, S Klepser, D Klochkov, W Kluźniak, D Kolitzus, Nu Komin, K Kosack, S Krakau, M Kraus, F Krayzel, P P Krüger, H Laffon, G Lamanna, J Lau, J-P Lees, J Lefaucheur, V Lefranc, A Lemière, M Lemoine-Goumard, J-P Lenain, E Leser, R Liu, T Lohse, M Lorentz, I Lypova, V Marandon, A Marcowith, C Mariaud, R Marx, G Maurin, N Maxted, M Mayer, P J Meintjes, M Meyer, A M W Mitchell, R Moderski, M Mohamed, K Morå, E Moulin, T Murach, M de Naurois, F Niederwanger, J Niemiec, L Oakes, P O'Brien, H Odaka, S Ohm, M Ostrowski, S Öttl, I Oya, M Padovani, M Panter, R D Parsons, M Paz Arribas, N W Pekeur, G Pelletier, C Perennes, P-O Petrucci, B Peyaud, S Pita, H Poon, D Prokhorov, H Prokoph, G Pühlhofer, M Punch, A Quirrenbach, S Raab, A Reimer, O Reimer, M Renaud, R de Los Reyes, F Rieger, C Romoli, S Rosier-Lees, G Rowell, B Rudak, C B Rulten, V Sahakian, D Salek, D A Sanchez, A Santangelo, M Sasaki, R Schlickeiser, F Schüssler, A Schulz, U Schwanke, S Schwemmer, M Settimo, A S Seyffert, N Shafi, I Shilon, R Simoni, H Sol, F Spanier, G Spengler, F Spies, Ł Stawarz, R Steenkamp, C Stegmann, F Stinzing, K Stycz, I Sushch, J-P Tavernet, T Tavernier, A M Taylor, R Terrier, L Tibaldo, M Tluczykont, C Trichard, R Tuffs, J van der Walt, C van Eldik, B van Soelen, G Vasileiadis, J Veh, C Venter, A Viana, P Vincent, J Vink, F Voisin, H J Völk, T Vuillaume, Z Wadiasingh, S J Wagner, P Wagner, R M Wagner, R White, A Wierzcholska, P Willmann, A Wörnlein, D Wouters, R Yang, V Zabalza, D Zaborov, M Zacharias, A A Zdziarski, A Zech, F Zefi, A Ziegler, N Żywucka
: A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l=-1...
October 7, 2016: Physical Review Letters
Johanna Flygt, Fredrik Clausen, Niklas Marklund
BACKGROUND: Injury to the white matter may lead to impaired neuronal signaling and is commonly observed following traumatic brain injury (TBI). Although endogenous repair of TBI-induced white matter pathology is limited, oligodendrocyte progenitor cells (OPCs) may be stimulated to proliferate and regenerate functionally myelinating oligodendrocytes. Even though OPCs are present throughout the adult brain, little is known about their proliferative activity following axonal injury caused by TBI...
October 17, 2016: Restorative Neurology and Neuroscience
Prashanthi Vemuri, David S Knopman, Clifford R Jack, Emily S Lundt, Stephen D Weigand, Samantha M Zuk, Kaely B Thostenson, Robert I Reid, Kejal Kantarci, Yelena Slinin, Kamakshi Lakshminarayan, Cynthia S Davey, Anne Murray
BACKGROUND: Chronic kidney disease (CKD) studies have reported variable prevalence of brain pathologies, in part due to low inclusion of participants with moderate to severe CKD. OBJECTIVE: To measure the association between kidney function biomarkers and brain MRI findings in CKD. METHODS: In the BRINK (BRain IN Kidney Disease) study, MRI was used to measure gray matter volumes, cerebrovascular pathologies (white matter hyperintensity (WMH), infarctions, microhemorrhages), and microstructural changes using diffusion tensor imaging (DTI)...
October 19, 2016: Journal of Alzheimer's Disease: JAD
Ferit Dogan, Dilek Sen Dokumaci, Ali Yildirim, Erol Bozdogan, Fatima Nurefsan Boyaci, Bulent Koca, Ekrem Karakas
OBJECTIVES: This preliminary study aimed to evaluate whether there are changes in the Apparent Diffusion Coefficient (ADC) values of the brain in patients presenting with Eisenmenger syndrome (ES). METHODS: This cross-sectional study included 10 consecutively recruited patients with ES and 10 healthy control subjects. In the patients and controls, 8 distinct neuroanatomical locations were selected for the analysis. Quantitative measurements of ADC values of the frontal and occiptal white matter, lentiform nucleus, thalamus, frontal cortex, anterior and posterior limbs of the internal capsule, caudate nucleus were measured...
October 21, 2016: British Journal of Radiology
Guiyou Liu, Fang Zhang, Yang Hu, Yongshuai Jiang, Zhongying Gong, Shoufeng Liu, Xiuju Chen, Qinghua Jiang, Junwei Hao
A recent genome-wide association study reported a significant association between rs9828519 (G) and nonresponsiveness to interferon-beta (IFN-β) treatment and dysregulation of SLC9A9 expression in multiple sclerosis (MS) cases. We hypothesize that disease-relevant tissues are necessary to detect the effects of rs9828519-tagged SNPs on SLC9A9 expression. Here, we investigated whether SLC9A9 expression is regulated by rs9828519-tagged SNPs in human brain tissue. We used HaploReg to identify the proxy SNPs of the rs9828519 variant based on linkage disequilibrium information from the 1000 Genomes Project...
October 20, 2016: Molecular Neurobiology
Cameron A Elliott, Vijay Ramaswamy, Francois D Jacob, Tejas Sankar, Vivek Mehta
BACKGROUND: Traumatic brain injury (TBI) is a major cause of infant morbidity and mortality. In these patients, magnetic resonance imaging (MRI) including diffusion-weighted imaging (DWI) is the test of choice to describe the extent of microstructural injury. CASE PRESENTATION AND DISCUSSION: In this case series, we describe novel acute and chronic MRI findings in four infants (6-19 months) with small, unilateral subdural hematomas in whom the etiology of head injury was suspicious for non-accidental trauma (NAT)...
October 20, 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Alba Di Pardo, Enrico Amico, Vittorio Maglione
Huntington Disease (HD) is a genetic neurodegenerative disorder characterized by broad types of cellular and molecular dysfunctions that may affect both neuronal and non-neuronal cell populations. Among all the molecular mechanisms underlying the complex pathogenesis of the disease, alteration of sphingolipids has been identified as one of the most important determinants in the last years. In the present study, besides the purpose of further confirming the evidence of perturbed metabolism of gangliosides GM1, GD1a, and GT1b the most abundant cerebral glycosphingolipids, in the striatal and cortical tissues of HD transgenic mice, we aimed to test the hypothesis that abnormal levels of these lipids may be found also in the corpus callosum white matter, a ganglioside-enriched brain region described being dysfunctional early in the disease...
2016: Frontiers in Neuroscience
Jiao Li, Yi Lu, Huiting Liang, Chunyan Tang, Lei Zhu, Jie Zhang, Renshi Xu
In order to searching the possible pathogenesis of amyotrophic lateral sclerosis (ALS), we examined the expression and distribution of FUS/TLS protein in the different anatomic regions, segments and neural cells of adult spinal cord at the different stages of the SOD1 wild-type and G93A transgenic mice using the fluorescent immunohistochemistry. Result revealed that, in the SOD1 wild-type mice, the FUS/TLS expression almost wasn't detected. However, in the SOD1 G93A mice, the FUS/TLS expression in the white matter was significantly more than that in the gray matter...
2016: International Journal of Biological Sciences
Emmanuel Mandonnet, Juan Martino, Silvio Sarubbo, Francesco Corrivetti, Schahraed Bouazza, Damien Bresson, Hugues Duffau, Sebastien Froelich
BACKGROUND: Advances in the oncological and functional results of insular surgery have been reported recently. Such successes have been made possible by the advent of the transopercular approach under awake monitoring and by the improved anatomical and functional knowledge of the white matter pathways surrounding the insula. Nonetheless, given the rarity of insular tumors, it is difficult to get familiar with the complex 3D anatomy of the different neuronal and vascular structures encountered during a transopercular insular resection...
October 17, 2016: World Neurosurgery
Robert S C Amaral, Min Tae M Park, Gabriel A Devenyi, Vivian Lynn, Jon Pipitone, Julie Winterburn, Sofia Chavez, Mark Schira, Nancy Lobaugh, Aristotle N Voineskos, Jens C Pruessner, M Mallar Chakravarty
Recently, much attention has been focused on the definition and structure of the hippocampus and its subfields, while the projections from the hippocampus have been relatively understudied. Here, we derive a reliable protocol for manual segmentation of hippocampal white matter regions (alveus, fimbria, and fornix) using high-resolution magnetic resonance images that are complementary to our previous definitions of the hippocampal subfields, both of which are freely available at
October 17, 2016: NeuroImage
Min-Soo Kim, Ji Hye Bang, Jun Lee, Jung-Soo Han, Tae Gon Baik, Won Kyung Jeon
BACKGROUND: Ginkgo biloba extract (GBE)-a widely used nutraceutical-is reported to have diverse functions, including positive effects on memory and vasodilatory properties. Although numerous studies have assessed the neuroprotective properties of GBE in ischemia, only a few studies have investigated the neuro-pharmacological mechanisms of action of GBE in chronic cerebral hypoperfusion (CCH). PURPOSE: In the present study, we sought to determine the effects of GBE on CCH-induced neuroinflammation and cholinergic dysfunction in a rat model of bilateral common carotid artery occlusion (BCCAo)...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Andreas Fehlner, Sebastian Hirsch, Martin Weygandt, Thomas Christophel, Eric Barnhill, Mykola Kadobianskyi, Jürgen Braun, Johannes Bernarding, Ralf Lützkendorf, Ingolf Sack, Stefan Hetzer
PURPOSE: To improve the resolution of elasticity maps by adapting motion and distortion correction methods for phase-based magnetic resonance imaging (MRI) contrasts such as magnetic resonance elastography (MRE), a technique for measuring mechanical tissue properties in vivo. MATERIALS AND METHODS: MRE data of the brain were acquired with echo-planar imaging (EPI) at 3T (n = 14) and 7T (n = 18). Motion and distortion correction parameters were estimated using the magnitude images...
October 20, 2016: Journal of Magnetic Resonance Imaging: JMRI
M Pistacchi, M Gioulis, F Sanson, S M Marsala
INTRODUCTION: Fahr's disease is characterized by bilateral calcium deposition within the basal ganglia, cerebellar dentate nucleus and subcortical brain white matter. The main clinical manifestations are rigid or hyperkinetic syndrome, mood disorders and cognitive impairment. The correlation between neurological impairment and symmetrical basal ganglia calcification is not so frequent. Aim of the study was to report the results of neurological assessment of three sporadic cases of Fahr's disease highlighting a correlation between the clinical syndrome and neuroimaging...
2016: Folia Neuropathologica
Ming-Ching Wen, Hannah S E Heng, Samuel Y E Ng, Louis C S Tan, Ling Ling Chan, Eng King Tan
Parkinson's disease (PD) is a debilitating neurodegenerative disorder. Findings on specific white matter (WM) alterations in PD have been inconsistent. We hypothesized that WM changes occur in early PD patients and unbiased whole-brain analysis may provide additional evidence of pathological WM changes in PD. In this study, we examined various indexes of WM microstructure in newly diagnosed PD patients at the whole-brain level. 64 PDs with Hoehn &Yahr stage 1 (HY1PDs), 87 PDs with Hoehn &Yahr stage 2 (HYPD2s), and 60 controls (HCs) were recruited...
October 20, 2016: Scientific Reports
Kamyar Keramatian, Taj Dhanoa, Alexander McGirr, Donna J Lang, William G Honer, Raymond W Lam, Lakshmi N Yatham
OBJECTIVES: The neurobiological underpinnings of bipolar I disorder are not yet understood. Previous structural neuroimaging studies of bipolar disorder have produced rather conflicting results. We hypothesize that clinical sub-phenotypes of bipolar I disorder defined by their psychotic symptoms, especially those with mood-incongruent psychotic features, may have more extensive structural brain abnormalities. METHODS: We investigated structural brain alterations in patients with first-episode mania (n = 55) with mood-congruent (n = 16) and mood-incongruent (n = 32) psychotic features, as well as those without psychotic symptoms (n = 7), relative to healthy subjects (n = 56)...
October 20, 2016: World Journal of Biological Psychiatry
Rangaswamy, V Ranjith, L Vikas, R Santosh
Fahr's disease or Fahr's syndrome is a rare neurodegenerative disorder characterized by abnormal symmetrical calcifications of the basal ganglia, thalami, sub-cortical hemispheric white matter and deep cerebellar nuclei. It can be idiopathic or associated with an endocrinopathy, frequently with parathyroid disorder. Clinical spectrum of the disease is wide ranging from neurological features like seizure, syncope, stroke like events, extra-pyramidal symptoms often combined with frontal sub-cortical pattern of behavioural dysfunction and psychiatric symptoms such as psychosis, mood disorder and dementia...
August 2016: Journal of the Association of Physicians of India
Karan Seegobin, Kamille Abdool, Kanterpersad Ramcharan, Haramnauth Dyaanand, Fidel Rampersad
We describe a case of Parry Romberg syndrome/en coupe de sabre in a woman whose disease started as seizures at age 8 but was diagnosed at the age 39. During these 31 years she got married, completed a first degree at university, had two successful pregnancies and has been gainfully employed. The features of generalized tonic-clonic seizures, autoimmune abnormalities, ocular abnormalities, morphea en coup de sabre and brain imaging abnormalities were present. Areas of parietal lobe cerebral calcification were encountered on the computed tomographic scan and bilateral periventricular white matter changes on the magnetic resonance imaging with frontal, temporal and parietal lobe brain atrophy ipsilateral to the facial hemiatrophy...
September 30, 2016: Neurology International
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