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https://www.readbyqxmd.com/read/28227293/complex-network-analysis-of-resting-state-fmri-of-the-brain
#1
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
#2
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
#3
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 2, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28057562/imaging-retina-to-study-dementia-and-stroke
#4
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...
January 3, 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
#5
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
#6
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
#7
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...
November 19, 2016: 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
#8
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
#9
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
#10
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
#11
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
#12
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...
October 24, 2016: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/27659189/measuring-brain-tissue-integrity-during-4-years-using-diffusion-tensor-imaging
#13
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
https://www.readbyqxmd.com/read/27649026/progress-in-neuro-imaging-of-brain-tumors
#14
Antonella Castellano, Andrea Falini
PURPOSE OF REVIEW: Magnetic resonance imaging (MRI) is routinely employed in the diagnosis and clinical management of brain tumors. This review provides an overview of the advancements in the field of MRI, with a particular focus on the quantitative assessment by advanced physiological magnetic resonance techniques in light of the new molecular classification of brain tumor. RECENT FINDINGS: Understanding how molecular phenotypes of brain tumors are reflected in noninvasive imaging is the goal of radiogenomics, which aims at determining the association between imaging features and molecular markers in neuro-oncology...
November 2016: Current Opinion in Oncology
https://www.readbyqxmd.com/read/27617867/a-novel-infusion-drainage-device-to-assess-lower-urinary-tract-function-in-neuro-imaging
#15
Lorenz Leitner, Matthias Walter, Behnaz Jarrahi, Johann Wanek, Jörg Diefenbacher, Lars Michels, Martina D Liechti, Spyros S Kollias, Thomas M Kessler, Ulrich Mehnert
OBJECTIVE: To evaluate the applicability and precision of a novel infusion-drainage device (IDD) for standardized filling paradigms in neuro-urology and functional magnetic resonance imaging (fMRI) studies of lower urinary tract (LUT) function/dysfunction. SUBJECTS/PATIENTS AND METHODS: The IDD is based on electrohydrostatic actuation which was previously proven feasible in a prototype setup. The current design includes hydraulic cylinders and a motorized slider to provide force and motion...
September 12, 2016: BJU International
https://www.readbyqxmd.com/read/27608765/bilateral-strio-pallido-dentate-calcinosis-fahr-s-disease-report-of-seven-cases-and-revision-of-literature
#16
Elisabetta Savino, Cecilia Soavi, Eleonora Capatti, Massimo Borrelli, Giovanni B Vigna, Angelina Passaro, Giovanni Zuliani
BACKGROUND: Fahr's disease is rare a neurodegenerative idiopathic condition characterized by symmetric and bilateral calcifications of basal ganglia, usually associated with progressive neuropsychiatric dysfunctions and movement disorders. The term "Fahr's syndrome" is used in presence of calcifications secondary to a specific cause, but the variability of etiology, pathogenesis, and clinical picture underlying this condition have raised the question of the real existence of a syndrome...
September 8, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27598104/automated-tissue-segmentation-of-mr-brain-images-in-the-presence-of-white-matter-lesions
#17
Sergi Valverde, Arnau Oliver, Eloy Roura, Sandra González-Villà, Deborah Pareto, Joan C Vilanova, Lluís Ramió-Torrentà, Àlex Rovira, Xavier Lladó
Over the last few years, the increasing interest in brain tissue volume measurements on clinical settings has led to the development of a wide number of automated tissue segmentation methods. However, white matter lesions are known to reduce the performance of automated tissue segmentation methods, which requires manual annotation of the lesions and refilling them before segmentation, which is tedious and time-consuming. Here, we propose a new, fully automated T1-w/FLAIR tissue segmentation approach designed to deal with images in the presence of WM lesions...
August 30, 2016: Medical Image Analysis
https://www.readbyqxmd.com/read/27593800/minimally-invasive-approach-in-bilateral-chronic-subdural-hematomas-surgical-selection-and-outcome-in-74-cases
#18
Min Xu, Bo Yu, Cunzu Wang, Xun Zhu, Xiaofeng Lu, Pin Chen, Hengzhu Zhang
AIM: To investigate effect of minimally invasive approaches on outcome of bilateral chronic subdural hematoma. MATERIAL AND METHODS: A retrospective analysis was performed in 74 hospitalized bilateral chronic subdural hematoma patients from January, 2010 to January, 2013 in Northern Jiangsu People\'s Hospital. Patients' gender, age, hematoma location, history of trauma, surgical approaches, the operation time, hospitalized time and follow-up three months after discharge were recorded...
January 25, 2016: Turkish Neurosurgery
https://www.readbyqxmd.com/read/27528110/abnormal-effective-fronto-limbic-connectivity-during-emotion-processing-in-schizophrenia
#19
Stéphane Potvin, Ovidiu Lungu, Andràs Tikàsz, Adrianna Mendrek
BACKGROUND: Schizophrenia is associated with core emotional dysfunctions. At the neural level, functional neuro-imaging studies have highlighted fronto-limbic alterations during emotion processing in schizophrenia, as well as impaired connectivity between the amygdala and the prefrontal cortex. However, the direction of the impaired fronto-limbic connections remains largely unknown. To clarify this issue, we performed an effective connectivity study on emotion processing in schizophrenia...
January 4, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/27527887/-mania-induced-by-antibiotic-therapy
#20
T R W M Walrave, S Mohammad, R R Ploeger
We report two cases of adults who developed mania after taking the antibiotic clarithromycin. Clarithromycin is a frequently used antibiotic, but it can lead to a rare but significant psychiatric complication in the form of a manic episode. Mania is commonly associated with bipolar disorder, but the causes can be pharmacological, metabolic or neurologic, particularly when it occurs in patients who themselves or whose families have no past history of psychiatric illness. New-onset mania calls for detailed clinical and laboratory testing and neuro-imaging so that somatic causes can be ruled out...
2016: Tijdschrift Voor Psychiatrie
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