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https://www.readbyqxmd.com/read/29332036/relationships-between-lower-olfaction-and-brain-white-matter-lesions-in-elderly-subjects-with-mild-cognitive-impairment
#1
Juliette Heinrich, Jean-Sébastien Vidal, Axelle Simon, Anne-Sophie Rigaud, Olivier Hanon, Jacques Epelbaum, Cecile Viollet, Emmanuelle Duron
BACKGROUND: Olfactory impairment is reported in mild cognitive impairment (MCI) and Alzheimer's disease (AD) and is associated with hippocampal atrophy. In elderly people, dementia with AD neuropathology and white matter lesions (WML) is common. In this context, olfactory impairment could also depend on the presence of WML. OBJECTIVE: To assess the cross-sectional relationship between olfaction and WML in elderly subjects with MCI. METHODS: Consecutive subjects, >65 years old, diagnosed as MCI after a comprehensive neuropsychological assessment in an expert memory center, with a brain MRI performed within a year and without major depressive state, were included...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29331877/cerebral-changes-and-disrupted-gray-matter-cortical-networks-in-asymptomatic-older-adults-at-risk-for-alzheimer-s-disease
#2
Jose L Cantero, Mercedes Atienza, Pascual Sanchez-Juan, Eloy Rodriguez-Rodriguez, Jose Luis Vazquez-Higuera, Ana Pozueta, Andrea Gonzalez-Suarez, Eduard Vilaplana, Jordi Pegueroles, Victor Montal, Rafael Blesa, Daniel Alcolea, Alberto Lleo, Juan Fortea
The diagnostic value of cerebrospinal fluid (CSF) biomarkers is well established in Alzheimer's disease, but our current knowledge about how abnormal CSF levels affect cerebral integrity, at local and network levels, is incomplete in asymptomatic older adults. Here, we have collected CSF samples and performed structural magnetic resonance imaging scans in cognitively normal elderly as part of a cross-sectional multicenter study (SIGNAL project). To identify group differences in cortical thickness, white matter volume, and properties of structural networks, participants were split into controls (N = 20), positive amyloid-β (Aβ1-42+) (N = 19), and positive phosphorylated tau (N = 18)...
December 20, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29331873/epilepsy-and-ovarian-failure-two-cases-of-adolescent-onset-ovarioleukodystrophy
#3
José David Herrera-García, Virginia Guillen-Martínez, Carlota Creus-Fernández, Adolfo Mínguez-Castellanos, Cristóbal Carnero Pardo
Vanishing white matter disease (VWM) was described by Van der Knaap in 1996. This association with premature ovarian failure is known as ovarioleukodystrophy. This is a rare entity caused by a mutation in one of the subunits of eukaryotic initiation factor 2B (EIF2B). The onset in adulthood or late in adolescence is very infrequent. A 41-years-old woman and her 37-years-old sister developed epilepsy in association with premature ovarian failure at the age of 13 and 18 respectively. The oldest-one started 17 years later progressive subcortical cognitive decline with predominant behavioural disorders and a progressive spastic paraparesis in association with symmetric cystic changes in the with matter of both hemispheres...
January 5, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29330587/posterior-reversible-encephalopathy-syndrome-with-spinal-cord-involvement-pres-sci-as-a-rare-complication-of-severe-diabetic-ketoacidosis-a-case-report-and-review-of-the-literature
#4
Jianfei Nao, Han Zhang, Si Wu, Xiaotian Zhang, Dongming Zheng
INTRODUCTION: In addition to diffuse brain oedema, diabetic ketoacidosis (DKA) can lead to ischaemic or haemorrhagic stroke, extrapontine myelinolysis, and sinovenous thrombosis. However, posterior reversible encephalopathy syndrome (PRES) and spinal cord oedema are rarely reported in patients with DKA. METHODS: We present a case of a 17-year-old-girl who developed headache, blurred vision, and paraplegia after her DKA was controlled. Sequential magnetic resonance (MR) scans of the brain and spinal cord were performed...
January 12, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29330420/left-ventricular-hypertrophy-and-cognitive-function-a-systematic-review
#5
C Restrepo, S K Patel, V Rethnam, E Werden, J Ramchand, L Churilov, L M Burrell, A Brodtmann
Cognitive impairment is common in patients with hypertension. Left ventricular hypertrophy (LVH) is recognised as a marker of hypertension-related organ damage and is a strong predictor of coronary artery disease, heart failure and stroke. There is evidence that LVH is independently associated with cognitive impairment, even after adjustment for the presence of hypertension. We conducted a systematic review that examined cognitive impairment in adults with LVH. Independent searches were performed in Ovid MEDLINE, Ovid psycInfo and PubMed with the terms left ventricular hypertrophy and cognition...
January 12, 2018: Journal of Human Hypertension
https://www.readbyqxmd.com/read/29330136/white-matter-volume-loss-in-amyotrophic-lateral-sclerosis-a-meta-analysis-of-voxel-based-morphometry-studies
#6
REVIEW
Guangxiang Chen, Baiwan Zhou, Hongyan Zhu, Weihong Kuang, Feng Bi, Hua Ai, Zhongwei Gu, Xiaoqi Huang, Su Lui, Qiyong Gong
Structural neuroimaging studies of white matter (WM) volume in amyotrophic lateral sclerosis (ALS) using voxel-based morphometry (VBM) have yielded inconsistent findings. This study aimed to perform a quantitative voxel-based meta-analysis using effect-size signed differential mapping (ES-SDM) to establish a statistical consensus between published studies for WM volume alterations in ALS. The pooled meta-analysis revealed significant WM volume losses in the bilateral supplementary motor areas (SMAs), bilateral precentral gyri (PGs), left middle cerebellar peduncle and right cerebellum in patients with ALS, involving the corticospinal tract (CST), interhemispheric fibers, subcortical arcuate fibers, projection fibers to the striatum and cortico-ponto-cerebellar tract...
January 9, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29328963/the-effect-of-white-matter-hyperintensities-on-cognition-is-mediated-by-cortical-atrophy
#7
Batool Rizvi, Atul Narkhede, Briana S Last, Mariana Budge, Giuseppe Tosto, Jennifer J Manly, Nicole Schupf, Richard Mayeux, Adam M Brickman
White matter hyperintensities (WMH) have been linked to cognitive dysfunction and dementia, although the reasons are unclear. One possibility is that WMH promote neurodegeneration, which, in turn, affects cognition. We examined whether cortical thickness, a marker of neurodegeneration, mediates the relationship between WMH and cognition among 519 older adults. Using conditional process analysis modeling techniques, we examined the association between WMH volume and global cognition and tested whether cortical thickness mediates this relationship statistically...
December 16, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29328926/dna-damage-associated-oligodendrocyte-degeneration-precedes-amyloid-pathology-and-contributes-to-alzheimer-s-and-dementia
#8
Kai-Hei Tse, Aifang Cheng, Fulin Ma, Karl Herrup
INTRODUCTION: In looking for novel non-amyloid-based etiologies for Alzheimer's disease, we explore the hypothesis that age-related myelin loss is an attractive explanation for age-associated cognitive decline and dementia. METHODS: We performed a meta-analysis of data in the National Alzheimer's Coordinating Center database accompanied by quantitative histopathology of myelin and oligodendrocytes (OLs) in frontal cortices of 24 clinically characterized individuals...
January 9, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29328521/the-central-vein-sign-differentiates-ms-from-cns-inflammatory-vasculopathies
#9
Pietro Maggi, Martina Absinta, Matteo Grammatico, Luisa Vuolo, Giacomo Emmi, Giovanna Carlucci, Gregorio Spagni, Alessandro Barilaro, Anna Maria Repice, Lorenzo Emmi, Domenico Prisco, Vittorio Martinelli, Roberta Scotti, Niloufar Sadeghi, Gaetano Perrotta, Pascal Sati, Bernard Dachy, Daniel S Reich, Massimo Filippi, Luca Massacesi
OBJECTIVES: In multiple sclerosis (MS), MRI is a sensitive tool for detecting white matter lesions, but its diagnostic specificity is still suboptimal; ambiguous cases are frequent in clinical practice. Detection of perivenular lesions in the brain (the "central vein sign") improves the pathological specificity of MS diagnosis, but comprehensive evaluation of this MRI biomarker in MS-mimicking inflammatory and/or autoimmune diseases, such as CNS inflammatory vasculopathies, is missing...
January 12, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29326136/using-correlative-properties-of-neighboring-pixels-to-improve-gray-white-differentiation-in-pediatric-head-ct-images
#10
T P Madaelil, A Sharma, C Hildebolt, M Parsons
BACKGROUND AND PURPOSE: A lower radiation dose can have a detrimental effect on the quality of head CT images. The aim of this study performed in a pediatric population was to test whether an image-processing algorithm (Correlative Image Enhancement) based on the correlation among intensities of neighboring pixels can improve gray-white differentiation in head CTs. MATERIALS AND METHODS: Sixty baseline head CT images with normal findings obtained from scans of 30 children were processed using Correlative Image Enhancement to produce corresponding enhanced images...
January 11, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29325780/longitudinal-atlas-for-normative-human-brain-development-and-aging-over-the-lifespan-using-quantitative-susceptibility-mapping
#11
Yuyao Zhang, Hongjiang Wei, Matthew J Cronin, Naying He, Fuhua Yan, Chunlei Liu
Longitudinal brain atlases play an important role in the study of human brain development and cognition. Existing atlases are mainly based on anatomical features derived from T1-and T2-weighted MRI. A 4D developmental quantitative susceptibility mapping (QSM) atlas may facilitate the estimation of age-related iron changes in deep gray matter nuclei and myelin changes in white matter. To this end, group-wise co-registered QSM templates were generated over various age intervals from age 1-83 years old. Registration was achieved by combining both T1-weighted and QSM images...
January 8, 2018: NeuroImage
https://www.readbyqxmd.com/read/29324910/deep-brain-nucleus-targeting-in-parkinson-s-disease-and-essential-tremor-by-image-guided-surgery-using-neuronavigation-system-with-tractography-and-volume-of-tissue-of-activated-assessment
#12
Amir Nikouei, Pooya Torkian, Tohid Emami Meybodi, Arash Javad Mousavi, Amir Saied Seddighi
OBJECTIVE: Deep Brain Stimulation (DBS) is an effective surgical approach for treatment of Parkinson's disease (PD), dystonia and essential tremor (ET). Traditionally, DBS is performed using frame-based stereotactic technique. Recently, image guided surgery (IGS) using neuronavigation has gained popularity in neurosurgical procedures. We aim to investigate whether DBS using neuronavigation is capable of improving patient's outcome and minimize its complications. SUBJECT AND METHODS: From February 2011 to October 2016, 20 patients with PD and 6 patients with ET were enrolled in the study...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29323198/paroxysmal-nocturnal-hemoglobinuria-pnh-brain-mri-ischemic-lesions-in-neurologically-asymtomatic-patients
#13
Wilma Barcellini, Elisa Scola, Silvia Lanfranconi, Marika Grottaroli, Francesca Binda, Bruno Fattizzo, Anna Zaninoni, Gloria Valcamonica, Claudia Maria Cinnante, Carla Boschetti, Massimiliano Buoli, Carlo Alfredo Altamura, Nereo Bresolin, Fabio Triulzi, Alberto Zanella, Agostino Cortelezzi
This study investigated for the first time brain ischemic involvement in 19 consecutive neurologically asymptomatic PNH patients by non-enhanced cerebral MRI, and by intracranial arterial and venous angio-MRI. Eleven cases (58%, 7 aged <65) showed pathological findings: 9 white matter (WM) abnormalities related to chronic ischemic small vessel disease, 2 a focal abnormality >5 mm, and 5 cases a score >4 by the age-related white matter changes (ARWMC) scale. Compared with age and sex-matched controls (1:2 ratio), patients showed an increased frequency of periventricular WM vascular degeneration (32% versus 5...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29323047/diffusion-tensor-imaging-of-spinal-microstructure-in-healthy-adults-improved-resolution-with-the-readout-segmentation-of-long-variable-echo-trains
#14
Bu-Tian Zhang, Meng Li, Li-Li Yu, Yi-Meng Dai, Shao-Nan Yu, Jin-Lan Jiang
Diffusion tensor imaging plays an important role in the accurate diagnosis and prognosis of spinal cord diseases. However, because of technical limitations, the imaging sequences used in this technique cannot reveal the fine structure of the spinal cord with precision. We used the readout segmentation of long variable echo-trains (RESOLVE) sequence in this cross-sectional study of 45 healthy volunteers aged 20 to 63 years. We found that the RESOLVE sequence significantly increased the resolution of the diffusion images and improved the median signal-to-noise ratio of the middle (C4-6) and lower (C7-T1) cervical segments to the level of the upper cervical segment...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29321969/the-two-year-progression-of-structural-and-functional-cerebral-mri-in-amyotrophic-lateral-sclerosis
#15
R A L Menke, M Proudfoot, K Talbot, M R Turner
MRI has emerged as one of several urgently needed candidate disease progression biomarkers for the neurodegenerative disorder amyotrophic lateral sclerosis (ALS), not least due to its unique ability to non-invasively assess structural and functional cerebral pathology. We sought to identify the extent of detectable change in cerebral MRI metrics over a more prolonged period. Analysis of multi-modal MRI data was performed in a cohort of sixteen patients (13 ALS and 3 with primary lateral sclerosis) in whom it was possible to acquire six-monthly images over two years...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29320500/brain-structural-changes-in-cynomolgus-monkeys-administered-with-1-methyl-4-phenyl-1-2-3-6-tetrahydropyridine-a-longitudinal-voxel-based-morphometry-and-diffusion-tensor-imaging-study
#16
Hyeonseok S Jeong, Sang-Rae Lee, Jieun E Kim, In Kyoon Lyoo, Sujung Yoon, Eun Namgung, Kyu-Tae Chang, Bom Sahn Kim, Sejung Yang, Jooyeon J Im, Saerom Jeon, Ilhyang Kang, Jiyoung Ma, Yong-An Chung, Soo Mee Lim
In animal models of Parkinson's disease (PD), 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is one of the most widely used agents that damages the nigrostriatal dopaminergic pathway. However, brain structural changes in response to MPTP remain unclear. This study aimed to investigate in vivo longitudinal changes in gray matter (GM) volume and white matter (WM) microstructure in primate models administered with MPTP. In six cynomolgus monkeys, high-resolution magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) scans were acquired 7 times over 32 weeks, and assessments of motor symptoms were conducted over 15 months, before and after the MPTP injection...
2018: PloS One
https://www.readbyqxmd.com/read/29319430/sex-differences-in-the-development-of-mild-cognitive-impairment-and-probable-alzheimer-s-disease-as-predicted-by-the-hippocampal-volume-or-white-matter-hyperintensities
#17
Shanna L Burke, Tianyan Hu, Nicole M Fava, Tan Li, Miriam J Rodriguez, Katie L Schuldiner, Aaron Burgess, Angela Laird
This study examined biological sex differences in the development of mild cognitive impairment (MCI) and probable Alzheimer's disease (AD) development as predicted by changes in the hippocampus or white matter hyperintensities. A secondary data analysis of the National Alzheimer's Coordinating Center Uniform Data Set was conducted. We selected samples of participants with normal cognition at baseline who progressed to MCI (n = 483) and those who progressed to probable AD (n = 211) to determine if hippocampal volume or white matter hyperintensities (WMH) at baseline predicted progression to probable AD or MCI and whether the rate of progression differed between men and women...
January 10, 2018: Journal of Women & Aging
https://www.readbyqxmd.com/read/29315984/default-mode-network-modifications-in-fabry-disease-a-resting-state-fmri-study-with-structural-correlations
#18
Sirio Cocozza, Giuseppe Pontillo, Mario Quarantelli, Francesco Saccà, Eleonora Riccio, Teresa Costabile, Gaia Olivo, Vincenzo Brescia Morra, Antonio Pisani, Arturo Brunetti, Enrico Tedeschi
Aim of the study was to evaluate the presence of Default Mode Network (DMN) modifications in Fabry Disease (FD), and their possible correlations with structural alterations and neuropsychological scores. Thirty-two FD patients with a genetically confirmed diagnosis of classical FD (12 males, mean age 43.3 ± 12.2) were enrolled, along with 35 healthy controls (HC) of comparable age and sex (14 males, mean age 42.1 ± 14.5). Resting-State fMRI data were analyzed using a seed-based approach, with six different seeds sampling the main hubs of the DMN...
January 9, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29315714/brain-abnormalities-in-cognition-anxiety-and-depression-regulatory-regions-in-adolescents-with-single-ventricle-heart-disease
#19
Nancy A Pike, Bhaswati Roy, Ritika Gupta, Sadhana Singh, Mary A Woo, Nancy J Halnon, Alan B Lewis, Rajesh Kumar
BACKGROUND: Single ventricle heart disease (SVHD) adolescents show cognitive impairments and anxiety and depressive symptoms, indicating the possibility of brain injury in regions that control these functions. However, brain tissue integrity in cognition, anxiety, and depression regulatory sites in SVHD remains unclear. We examined brain tissue changes in SVHD compared to controls using T2-relaxometry procedures, which measure free water content and show tissue injury. METHODS: Proton-density and T2-weighted images, using a 3...
January 6, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29315514/cytotoxic-edema-at-onset-in-west-syndrome-of-unknown-etiology-a-longitudinal-diffusion-tensor-imaging-study
#20
Chikako Ogawa, Hiroyuki Kidokoro, Tatsuya Fukasawa, Hiroyuki Yamamoto, Naoko Ishihara, Yuji Ito, Yoko Sakaguchi, Yu Okai, Atsuko Ohno, Tomohiko Nakata, Yoshiteru Azuma, Ayako Hattori, Tetsuo Kubota, Takeshi Tsuji, Akihiro Hirakawa, Hisashi Kawai, Jun Natsume
OBJECTIVE: To clarify longitudinal changes in white matter microstructures from the onset of disease in patients with West syndrome (WS) of unknown etiology. METHODS: Diffusion tensor imaging (DTI) was prospectively performed at onset and at 12 and 24 months old in 17 children with WS of unknown etiology. DTI was analyzed using tract-based spatial statistics (TBSS) and tract-specific analysis (TSA) of 13 fiber tracts, and fractional anisotropy (FA) and mean diffusivity (MD) were compared with those of 42 age-matched controls...
January 8, 2018: Epilepsia
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