Filters








1,864 Hits in 6.0 sec

Role of Ongoing, Intrinsic Activity of Neuronal Populations for Quantitative Neuroimaging of Functional Magnetic Resonance Imaging–Based Networks

Fahmeed Hyder, Peter Herman, Basavaraju G. Sanganahalli, Daniel Coman, Hal Blumenfeld, Douglas L. Rothman
2011 Brain Connectivity  
In humans and animal models, functional magnetic resonance imaging (fMRI) is gaining increasing popularity for network mapping.  ...  Thus, another alternative for quantitative neuroimaging of fMRI-based networks is a perspective in which the activity of a neuronal population is accounted for by the demanded oxidative energy (CMR O2  ...  Acknowledgment The authors thank their colleagues at Yale for their insightful comments.  ... 
doi:10.1089/brain.2011.0032 pmid:22433047 pmcid:PMC3621320 fatcat:pqsaykiki5bc7bnsuczwsg2nhq

Large-scale brain networks in cognition: emerging methods and principles

Steven L. Bressler, Vinod Menon
2010 Trends in Cognitive Sciences  
Functional magnetic resonance imaging (fMRI): noninvasive neuroimaging method that measures BOLD signals in the brain in vivo.  ...  Diffusion-based tractography: class of noninvasive magnetic resonance imaging techniques that trace fiber bundles (white matter tracts) in the human brain in vivo based on properties of water molecule  ...  Freeman on the occasion of his 80th birthday and examined current knowledge of large-scale brain network function from a multidisciplinary perspective.  ... 
doi:10.1016/j.tics.2010.04.004 pmid:20493761 fatcat:6tlmicz5k5a6zniudedxsmxfd4

Resting brains never rest: computational insights into potential cognitive architectures

Gustavo Deco, Viktor K. Jirsa, Anthony R. McIntosh
2013 Trends in Neurosciences  
Small extrinsic perturbations can shape taskrelated network dynamics, whereas perturbations from intrinsic noise generate excursions reflecting the range of available functional networks.  ...  This is particularly advantageous for the efficiency and speed of network mobilization.  ...  This possibility has been explored in studies of RSNs in functional magnetic resonance imaging (fMRI).  ... 
doi:10.1016/j.tins.2013.03.001 pmid:23561718 fatcat:3ngnbbppffcgjg5646mngbvbwq

Resting Brains Never Rest: Computational Insights into Potential Cognitive Architectures

Gustavo Deco, Viktor K. Jirsa, Anthony R. McIntosh
2018 Trends in Neurosciences  
Small extrinsic perturbations can shape taskrelated network dynamics, whereas perturbations from intrinsic noise generate excursions reflecting the range of available functional networks.  ...  This is particularly advantageous for the efficiency and speed of network mobilization.  ...  This possibility has been explored in studies of RSNs in functional magnetic resonance imaging (fMRI).  ... 
doi:10.1016/j.tins.2017.12.007 pmid:29317106 fatcat:ok7h22d4zfhjlgp4q45o7y4ysq

Large-scale brain systems in ADHD: beyond the prefrontal–striatal model

F. Xavier Castellanos, Erika Proal
2012 Trends in Cognitive Sciences  
Insights emerging from mapping intrinsic brain connectivity networks provide a potentially mechanistic framework for an understanding of aspects of ADHD such as neuropsychological and behavioral inconsistency  ...  We relate frontoparietal, dorsal attentional, motor, visual and default networks to the ADHD functional and structural literature.  ...  Mapping of intrinsic functional connectivity Functional magnetic resonance imaging (fMRI) without an explicit task, also known as resting-state fMRI (R-fMRI), has facilitated delineation of the intrinsic  ... 
doi:10.1016/j.tics.2011.11.007 pmid:22169776 pmcid:PMC3272832 fatcat:nk7yhobxlvaefh7ki25sumgfha

Innovative MRI Techniques in Neuroimaging Approaches for Cerebrovascular Diseases and Vascular Cognitive Impairment

Lorenzo Carnevale, Giuseppe Lembo
2019 International Journal of Molecular Sciences  
microstructural characteristics of the white matter (fractional anisotropy, mean diffusivity); (iii) neuronal activation and synchronicity to identify functional networks across different regions (functional  ...  To investigate the structural and functional characteristics of the brain, MRI has proven an invaluable tool for visualizing the internal organs of patients and analyzing the parameters related to neuronal  ...  Functional MRI to Highlight Networks of Neurons Functional MRI is an imaging technique that exploits the neurovascular mechanism called "functional hyperemia" whereby ongoing brain regional activation  ... 
doi:10.3390/ijms20112656 fatcat:uitkgieb7vfmhac3m3557sqptm

Laboratory and Neuroimaging Biomarkers in Neuropsychiatric Systemic Lupus Erythematosus: Where Do We Stand, Where To Go?

César Magro-Checa, Gerda M. Steup-Beekman, Tom W. Huizinga, Mark A. van Buchem, Itamar Ronen
2018 Frontiers in Medicine  
This article critically reviews the current state of knowledge on laboratory and neuroimaging biomarkers in NP-SLE, discusses the factors that need to be addressed to make these biomarkers suitable for  ...  it is the consequence of a concomitant underlying abnormality related to SLE activity.  ...  Such qMRI methods include relaxometric analyses and magnetization transfer imaging, diffusion weighted and diffusion tensor imaging, perfusion based imaging, and magnetic resonance spectroscopy.  ... 
doi:10.3389/fmed.2018.00340 pmid:30564579 pmcid:PMC6288259 fatcat:xlzea55kpzefzdyz5dt5mqz4ci

Bidirectional interactions between neuronal and hemodynamic responses to transcranial direct current stimulation (tDCS): challenges for brain-state dependent tDCS

Anirban Dutta
2015 Frontiers in Systems Neuroscience  
quantitative mathematical description of the metabolic activation in neurons and glial 94 cells, as well as of the macroscopic measurements obtained during brain imaging.  ...  Neuronal network activity drives functional hyperemia via direct effects on the blood vessels network as well as indirect effects via the astrocytic network.  ... 
doi:10.3389/fnsys.2015.00107 pmid:26321925 pmcid:PMC4530593 fatcat:tba4prcsnjfnndze2fmyllqeli

On the nature of the BOLD fMRI contrast mechanism

Nikos K. Logothetis, Josef Pfeuffer
2004 Magnetic Resonance Imaging  
Since its development about 15 years ago, functional magnetic resonance imaging (fMRI) has become the leading research tool for mapping brain activity.  ...  We conclude by considering applications of invasive MRI, including injections of paramagnetic tracers for the study of connectivity in the living animal and simultaneous imaging and electrical microstimulation  ...  Pfeuffer / Magnetic Resonance Imaging 22 (2004) 1517-1531  ... 
doi:10.1016/j.mri.2004.10.018 pmid:15707801 fatcat:gfqw2jbg4faxldbr4mtcw2vlmy

Epilepsy as progressive disorders: What is the evidence that can guide our clinical decisions and how can neuroimaging help?

Ana C. Coan, Fernando Cendes
2013 Epilepsy & Behavior  
Studies with homogenous groups and longer follow-up are necessary for appropriate conclusions about the real burden of damage progression in epilepsies, and neuroimaging will be essential in this context  ...  There is evidence that some types of epilepsy progress over time, and an important part of this knowledge has derived from neuroimaging studies.  ...  Neuroimaging evidence of epilepsy progression Magnetic resonance imaging is the most important neuroimaging tool for the evaluation of epilepsies.  ... 
doi:10.1016/j.yebeh.2012.09.027 pmid:23127969 fatcat:s4ewdapolfanndx7jl3dcqqaky

Understanding Neurogastroenterology From Neuroimaging Perspective: A Comprehensive Review of Functional and Structural Brain Imaging in Functional Gastrointestinal Disorders

Michiko Kano, Patrick Dupont, Qasim Aziz, Shin Fukudo
2018 Journal of Neurogastroenterology and Motility  
Studies using resting-state functional magnetic resonance imaging reported abnormal local and global connectivity in the areas related to pain processing and the default mode network (a physiological baseline  ...  Molecular imaging by magnetic resonance spectroscopy and positron emission tomography in FGIDs remains relatively sparse.  ...  Resting-state functional magnetic resonance imaging (rsfMRI) measures the spontaneous fluctuations during rest and uncovers the intrinsic brain functional architecture, ie, functional connections of specific  ... 
doi:10.5056/jnm18072 pmid:30041284 pmcid:PMC6175554 fatcat:j6ewl6vz5bemfj7bplpmlfzbqi

Magnetic Resonance Imaging technology — bridging the gap between noninvasive human imaging and optical microscopy

Jonathan R Polimeni, Lawrence L Wald
2018 Current Opinion in Neurobiology  
Technological advances in Magnetic Resonance Imaging (MRI) have provided substantial gains in the sensitivity and specificity of functional neuroimaging.  ...  Mounting evidence demonstrates that the hemodynamic changes utilized in functional MRI can be far more spatially and thus neuronally specific than previously believed.  ...  Bastien Guérin, Kawin Setsompop, and Thomas Witzel for helpful comments, and Dr. Berkin Bilgic for help with the wave-CAIPI sampling simulation.  ... 
doi:10.1016/j.conb.2018.04.026 pmid:29753942 pmcid:PMC6015259 fatcat:7msf5i7k5ja3tpavexhuzlw7wu

Current topic: Neuroimaging in child and adolescent psychiatric disorders

P. J. Santosh
2000 Archives of Disease in Childhood  
Better understanding of the corticostriatal neural networks will shed more light on the neurodevelopmental disorders of childhood.  ...  This review describes the current status of neuroimaging in childhood psychopathology and discusses limitations of the various studies.  ...  Structural imaging measures anatomic structure (radiographs, computed tomography (CT), magnetic resonance (MR) imaging) while functional imaging measures the intrinsic physical properties of tissues (for  ... 
doi:10.1136/adc.82.5.412 pmid:10799438 pmcid:PMC1718305 fatcat:2vy7oerrtnhclmdmdtu77toyje

Functional Networks in Disorders of Consciousness

Camille Chatelle, Brian Edlow, Yelena Bodien
2017 Seminars in neurology  
More recently, functional magnetic resonance (fMRI) techniques have added to our understanding of functional network dynamics in this population.  ...  Both methods have shown that whether at rest or performing a goal-oriented task, functional networks essential for processing intrinsic thoughts and extrinsic stimuli are disrupted in patients with DoC  ...  ., for assistance with processing the resting-state functional MRI data shown in Figures 3 and 4 . This work was supported by the National Institutes of Health (K23NS094538), the American  ... 
doi:10.1055/s-0037-1607310 pmid:29207410 pmcid:PMC5884076 fatcat:efpsjdba45a5jla2tqdhm66req

Functional connectivity MRI in infants: Exploration of the functional organization of the developing brain

Christopher D. Smyser, Abraham Z. Snyder, Jeffrey J. Neil
2011 NeuroImage  
Functional connectivity magnetic resonance imaging (fcMRI) utilizes spontaneous, low frequency (< 0.1 Hz), coherent fluctuations in blood oxygen level dependent (BOLD) signal to identify networks of functional  ...  Due to the intrinsic characteristics of its image acquisition and analysis, fcMRI offers a novel neuroimaging approach well suited to investigation of infants.  ...  The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.  ... 
doi:10.1016/j.neuroimage.2011.02.073 pmid:21376813 pmcid:PMC3089442 fatcat:jde4ndiqwfgpfg7ivjmbvicufu
« Previous Showing results 1 — 15 out of 1,864 results