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https://www.readbyqxmd.com/read/28415681/a-reproducible-model-of-intramedullary-spinal-cord-tumor-in-rats-bearing-rg2-cells
#1
Yuandong Zhuang, Wei Zhao, Weiqiang Zhang, Hao Wei, Xinming Huang, Gangfeng Cai, Chaofeng Fu, Chunhua Wang, Rui Wang, Songsheng Shi, Weizhong Yang, Chunmei Chen
Intramedullary spinal cord tumors (IMSCTs) are lethal diseases to many patients. The lack of adequate animal model has hampered the development of novel treatments. In the current study, a rodent intramedullary glioma model is established to study IMSCT progression. Fischer 344 rats received a intramedullary implantation of RG2 glioma cells. The neurological state of each rat was evaluated on daily basis using the Basso, Beattie and Bresnahan (BBB) scale. Rats implanted with RG2 cells developed significant hind limb paraplegia 20 days after implantation...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28394816/brain-mri-findings-in-pediatric-patients-post-ecmo
#2
Venessa L Pinto, Sumit Pruthi, Ashly C Westrick, Chevis N Shannon, Brian C Bridges, Truc M Le
Neurologic complications can occur with ECMO due to several factors. Prior studies identified neonates as having unique risk factors and neuro-imaging findings post-ECMO. The aim of this study is to describe brain MRI findings of pediatric patients treated with ECMO. We conducted a retrospective study of non-neonatal pediatric patients who underwent a comprehensive brain MRI after ECMO, between January 2000 and July 2015. We identified 47 pediatric patients in the study cohort with a median age of 8 months (IQR 3-170mo) and a median ECMO run duration of 7...
April 6, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28393415/the-insertion-of-electrodes-in-the-brain-for-electrophysiological-recording-or-chronic-stimulation-is-not-associated-with-any-biochemically-detectable-neuronal-injury
#3
Marios S Themistocleous, Damianos E Sakas, Efstathios Boviatsis, George Tagaris, Andreas Kouyialis, Christina Psachoulia, Pantelis Stathis
OBJECTIVE: The aim of this study was to evaluate the degree of brain tissue injury that could be potentially induced by the introduction of a) microrecording electrodes, b) macrostimulation electrodes, or c) chronic stimulation electrodes. We aimed to evaluate whether the use of five simultaneous microrecording tracks is associated with any brain injury not detectable by conventional imaging such as CT or MRI. MATERIALS AND METHODS: The study included 61 patients who underwent surgery for implantation of 121 DBS leads...
April 10, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28390064/pgap3-related-hyperphosphatasia-with-mental-retardation-syndrome-report-of-10-new-patients-and-a-homozygous-founder-mutation
#4
M S Abdel-Hamid, M Y Issa, G A Otaify, S F Abdel-Ghafar, H M Elbendary, M S Zaki
Hyperphosphatasia with mental retardation syndrome (HPMRS) is caused by recessive mutations in genes involved in the glycosylphosphatidylinsitol pathway, including PGAP3. Herein, we describe 10 patients from 8 Egyptian families presenting with developmental delay, severe intellectual disability, distinct facial dysmorphism and increased alkaline phosphatase. Eight patients had cleft palate, four had postnatal microcephaly and five had seizures. Neuroimaging findings showed thin corpus callosum in 9 patients, mild ventriculomegaly in 3 patients and variable degrees of cerebellar vermis hypoplasia in 4 patients, a finding not previously reported in patients with HPMRS...
April 8, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28329104/vascular-cerebral-damage-in-frail-older-adults-the-amimage-study
#5
José Alberto Avila-Funes, Amandine Pelletier, Céline Meillon, Gwénaëlle Catheline, Olivier Periot, Irene Trevin O-Frenk, Magali Gonzalez-Colaço, Jean-François Dartigues, Karine Pérès, Michèle Allard, Bixente Dilharreguy, Hélène Amieva
Background: Frailty has been associated with increased risk of adverse-health related outcomes including cognitive impairment. However, little is know about the pathogenesis relating frailty to cognitive decline. Therefore, the main objective of this study was to investigate the association between vascular cerebral damage and frailty. Methods: Cross-sectional study involving 176 community-dwelling participants aged 67-86 years, participating in the AMImage Study, an ancillary neuro-imaging project of the AMI cohort, a French prospective cohort including older farmers living in rural areas...
January 21, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28269074/complex-network-analysis-of-resting-state-fmri-of-the-brain
#6
Abdul Rauf Anwar, Muhammad Yousaf Hashmy, Bilal Imran, Muhammad Hussnain Riaz, Sabtain Muhammad Muntazir Mehdi, Makii Muthalib, Stephane Perrey, Gunther Deuschl, Sergiu Groppa, Muthuraman Muthuraman
Due to the fact that the brain activity hardly ever diminishes in healthy individuals, analysis of resting state functionality of the brain seems pertinent. Various resting state networks are active inside the idle brain at any time. Based on various neuro-imaging studies, it is understood that various structurally distant regions of the brain could be functionally connected. Regions of the brain, that are functionally connected, during rest constitutes to the resting state network. In the present study, we employed the complex network measures to estimate the presence of community structures within a network...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28239525/reproducibility-of-tract-based-white-matter-microstructural-measures-using-the-enigma-dti-protocol
#7
Ashley Acheson, S Andrea Wijtenburg, Laura M Rowland, Anderson Winkler, Charles W Mathias, L Elliot Hong, Neda Jahanshad, Binish Patel, Paul M Thompson, Stephen A McGuire, Paul M Sherman, Peter Kochunov, Donald M Dougherty
BACKGROUND: In preparation for longitudinal analyses of white matter development in youths with family histories of substance use disorders (FH+) or without such histories (FH-), we examined the reproducibility and reliability of global and regional measures of fractional anisotropy (FA) values, measured using the Enhancing Neuro Imaging Genetics Through Meta Analysis (ENIGMA)-diffusion tensor imaging (DTI) protocol. Highly reliable measures are necessary to detect any subtle differences in brain development...
February 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28227293/complex-network-analysis-of-resting-state-fmri-of-the-brain
#8
Abdul Rauf Anwar, Muhammad Yousaf Hashmy, Bilal Imran, Muhammad Hussnain Riaz, Sabtain Muhammad Muntazir Mehdi, Makii Muthalib, Stephane Perrey, Gunther Deuschl, Sergiu Groppa, Muthuraman Muthuraman, Abdul Rauf Anwar, Muhammad Yousaf Hashmy, Bilal Imran, Muhammad Hussnain Riaz, Sabtain Muhammad Muntazir Mehdi, Makii Muthalib, Stephane Perrey, Gunther Deuschl, Sergiu Groppa, Muthuraman Muthuraman, Bilal Imran, Makii Muthalib, Gunther Deuschl, Sergiu Groppa, Abdul Rauf Anwar, Stephane Perrey, Muhammad Hussnain Riaz, Muthuraman Muthuraman, Muhammad Yousaf Hashmy
Due to the fact that the brain activity hardly ever diminishes in healthy individuals, analysis of resting state functionality of the brain seems pertinent. Various resting state networks are active inside the idle brain at any time. Based on various neuro-imaging studies, it is understood that various structurally distant regions of the brain could be functionally connected. Regions of the brain, that are functionally connected, during rest constitutes to the resting state network. In the present study, we employed the complex network measures to estimate the presence of community structures within a network...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28202822/-idiopathic-intracranial-hypotension
#9
Iwao Takeshita, Satoshi O Suzuki, Toru Iwaki
Idiopathic intracranial hypotension (hypovolemia) is almost exclusively provoked by cerebrospinal fluid (CSF) leakage through spontaneously rent dural sac. An initial clinical feature of a severe headache with or without nausea/vomiting should be differentiated from a life-threatening stroke. An early diagnosis and proper therapy may guarantee a good outcome, while delays may promote complicated manifestations and irreversible poor outcome in a few patients. In this article, neuro-imaging studies of some demonstrable cases are presented and the outlets of the spinal CSF and spinal CSF pathways are shown with immunohistological staining...
February 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28163122/comparison-of-bold-diffusion-weighted-fmri-and-adc-fmri-for-stimulation-of-the-primary-visual-system-with-a-block-paradigm
#10
R Nicolas, H Gros-Dagnac, F Aubry, P Celsis
The blood oxygen level-dependent (BOLD) effect is extensively used for functional MRI (fMRI) but presents some limitations. Diffusion-weighted fMRI (DfMRI) has been proposed as a method more tightly linked to neuronal activity. This work proposes a protocol of DfMRI acquired for several b-values and diffusion directions that is compared to gradient-echo BOLD (GE-BOLD) and to repeated spin-echo BOLD (SE-BOLD, acquisitions performed with b=0s/mm(2)), which was also used to ensure the reproducibility of the response...
February 3, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28057562/imaging-retina-to-study-dementia-and-stroke
#11
REVIEW
Carol Yim-Lui Cheung, M Kamran Ikram, Christopher Chen, Tien Yin Wong
With increase in life expectancy, the number of persons suffering from common age-related brain diseases, including neurodegenerative (e.g., dementia) and cerebrovascular (e.g., stroke) disease is expected to rise substantially. As current neuro-imaging modalities such as magnetic resonance imaging may not be able to detect subtle subclinical changes (resolution <100-500 μm) in dementia and stroke, there is an urgent need for other complementary techniques to probe the pathophysiology of these diseases...
March 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28041574/suicidal-ideation-at-1-year-post-stroke-a-nationwide-survey-in-china
#12
Yang Yang, Yu-Zhi Shi, Ning Zhang, Shuo Wang, Gabor S Ungvari, Chee H Ng, Yi-Long Wang, Xing-Quan Zhao, Yong-Jun Wang, Chun-Xue Wang, Yu-Tao Xiang
OBJECTIVE: Few studies on suicidal ideation have been conducted in post-stroke patients in China. This national study examined suicidal ideation at 1-year post-stroke and explored its demographic and clinical correlates. METHODS: A total of 1418 patients with ischemic stroke were included in 56 hospitals nationwide. Demographic, clinical characteristics and neuro-imaging information were collected with standardized instruments, including assessment of stroke severity, depression, cognitive impairment, stroke recurrence, physical disability and insomnia...
January 2017: General Hospital Psychiatry
https://www.readbyqxmd.com/read/27956173/venous-infarction-mimicking-top-of-basilar-syndrome-an-uncommon-complication-of-adult-influenza-infection
#13
Soo Hyun Cho, Kyung Mi Lee, Bum Joon Kim, Jae Hong Yi, Kyung Chul Noh, Eui Jong Kim, Hak Young Rhee, Key-Chung Park
Influenza infection increases the risk of ischemic stroke. Here, we represent a case of a 32year-old female who presented with acutely developed altered mental status after influenza A infection. The clinical manifestation and initial lesion on brain DWI mimicked top of basilar syndrome, but without an arterial occlusion or stenosis. Follow-up neuro imaging analysis suggested cerebral venous infarction. It is valuable to report this case of venous infarction in a healthy young adult, as an uncommon complication of adult influenza infection...
March 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27913086/punctate-white-matter-lesions-in-full-term-infants-with-neonatal-seizures-associated-with-slc13a5-mutations
#14
Lauren C Weeke, Eva Brilstra, Kees P Braun, Evelien Zonneveld-Huijssoon, Gajja S Salomons, Bobby P Koeleman, Koen L van Gassen, Henrica L van Straaten, Dana Craiu, Linda S de Vries
INTRODUCTION: Early-onset epileptic encephalopathy caused by biallelic SLC13A5 mutations is characterized by seizure onset in the first days of life, refractory epilepsy and developmental delay. Little detailed information about the brain MRI features is available in these patients. METHODS: Observational study describing the neuro-imaging findings in eight patients (five families) with mutations in the SLC13A5 gene. Seven infants had an MRI in the neonatal period, two had a follow-up MRI at the age of 6 and 18 months and one only at 13 months...
March 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/27870421/multimodal-neuroimaging-of-male-and-female-brain-structure-in-health-and-disease-across-the-life-span
#15
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/27824877/the-disability-rate-of-5-year-post-stroke-and-its-correlation-factors-a-national-survey-in-china
#16
Yang Yang, Yu-Zhi Shi, Ning Zhang, Shuo Wang, Gabor S Ungvari, Chee H Ng, Yi-Long Wang, Xing-Quan Zhao, Yong-Jun Wang, Chun-Xue Wang, Yu-Tao Xiang
Few studies on long-term functional outcome have been conducted in post-stroke patients in China. The objective of this study was to conduct a nationwide survey in China to investigate the 5-year prevalence of post-stroke disability and its correlation factors. A total of 893 patients with ischemic stroke were included. Demographic, clinical and neuro-imaging information were collected with standardized instruments that assessed stroke severity, depression, cognitive impairment, stroke recurrence and physical disability...
2016: PloS One
https://www.readbyqxmd.com/read/27821269/neuro-imaging-evaluation-after-the-first-afebrile-seizure-in-children-a-retrospective-observational-study
#17
Rana Al-Shami, Abdulhafeez M Khair, Mahmoud Elseid, Khalid Ibrahim, Amna Al-Ahmad, Ahmed Elsetouhy, Hussein Kamel, Khalid Al Yafei, Khalid Mohamed
PURPOSE: To evaluate the role of neuro-imaging in children presenting with the first afebrile seizure and determine factors that influence the outcome of imaging in a large paediatric emergency centre. METHOD: This is a retrospective review of the medical records of all patients presenting with the first non-febrile seizure to a large paediatric emergency centre in the state of Qatar. Seizure classification followed the current ILAE classification system. Imaging was undertaken in our tertiary hospital and all images were reviewed by experienced neuro-radiologists...
December 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27781046/is-intra-arterial-treatment-for-acute-ischemic-stroke-less-effective-in-women-than-in-men
#18
Inger R de Ridder, Puck S S Fransen, Debbie Beumer, Olvert A Berkhemer, Lucie A van den Berg, Marieke J Wermer, Hester Lingsma, Wim H van Zwam, Yvo B Roos, Robert J van Oostenbrugge, Charles B Majoie, Aad van der Lugt, Diederik W J Dippel
INTRODUCTION: Stroke etiology and outcome after ischemic stroke differ between men and women. We examined if sex modifies the effect of intra-arterial treatment (IAT) in a randomized clinical trial of IAT for acute ischemic stroke in the Netherlands (MR CLEAN). PATIENTS AND METHODS: The primary outcome was the score on the modified Rankin scale at 90 days. We tested for interaction between sex and treatment and estimated the treatment effect by sex with multiple ordinal logistic regression with adjustment for prognostic factors...
September 2016: Interventional Neurology
https://www.readbyqxmd.com/read/27778248/analysis-of-the-dynamics-of-temporal-relationships-of-neural-activities-using-optical-imaging-data
#19
Jannetta S Steyn, Peter Andras
The temporal relationship between the activities of neurons in biological neural systems is critically important for the correct delivery of the functionality of these systems. Fine measurement of temporal relationships of neural activities using micro-electrodes is possible but this approach is very limited due to spatial constraints in the context of physiologically valid settings of neural systems. Optical imaging with voltage-sensitive dyes or calcium dyes can provide data about the activity patterns of many neurons in physiologically valid settings, but the data is relatively noisy...
April 2017: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/27659189/measuring-brain-tissue-integrity-during-4-years-using-diffusion-tensor-imaging
#20
D Ontaneda, K Sakaie, J Lin, X-F Wang, M J Lowe, M D Phillips, R J Fox
BACKGROUND AND PURPOSE: DTI is an MR imaging measure of brain tissue integrity. Little is known regarding the long-term longitudinal evolution of lesional and nonlesional tissue DTI parameters in multiple sclerosis and the present study examines DTI evolution over 4 years. MATERIALS AND METHODS: Twenty-one patients with multiple sclerosis were imaged for up to 48 months after starting natalizumab therapy. Gadolinium-enhancing lesions at baseline, chronic T2 lesions, and normal-appearing white matter were followed longitudinally...
January 2017: AJNR. American Journal of Neuroradiology
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