Analysis of Simultaneous EEG-fMRI Data for Discovering the Association Between EEG Activities and FMRI Functional Connectivity PDF Download
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Author: 谭骜
Publisher:
ISBN:
Category : Brain
Languages : en
Pages : 0
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Book Description
Author: 谭骜
Publisher:
ISBN:
Category : Brain
Languages : en
Pages : 0
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Book Description
Author: Markus Ullsperger
Publisher: Oxford University Press
ISBN: 0199706832
Category : Medical
Languages : en
Pages : 332
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Book Description
One of the major challenges in science is to study and understand the human brain. Numerous methods examining different aspects of brain functions have been developed and employed. To study systemic interactions brain networks in vivo, non-invasive methods such as electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) have been used with great success. However, each of these methods can map only certain, quite selective aspects of brain function while missing others; and the inferences on neuronal processes and information flow are often rather indirect. To overcome these shortcomings of single methods, researchers have attempted to combine methods in order to make optimal use of their advantages while compensating their disadvantages. Hence, it is not surprising that soon after the introduction of fMRI as a neuroimaging method the possibilities of combinations with EEG have been explored. This book is intended to aid researchers who plan to set up a simultaneous EEG-fMRI laboratory and those who are interested in integrating electrophysiological and hemodynamic data. As will be obvious from the different chapters, this is a dynamically developing field in which several approaches are being tested, validated and compared. Currently, there is no one best solution for all problems available, but many promising techniques are emerging. This book shall give a comprehensive overview of these techniques. In addition, it points to open questions and directions for future research.
Author: Christoph Mulert
Publisher: Springer Nature
ISBN: 3031071212
Category : Medical
Languages : en
Pages : 785
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Book Description
This book provides the most up-to-date and comprehensive source of information on all aspects of EEG-fMRI, a neuroimaging technique for synchronous acquisition of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) data. The reader will find in-depth information on the physiological principles of the EEG and fMRI signals, practical aspects of data measurement, artifact reduction, data analysis, and applications. All the main areas of the technique’s application are the subject of one or multiple chapters: sleep research, cognitive neuroscience, and clinical neurology and psychiatry. In addition to providing a thorough update, this second edition offers five entirely new chapters covering important areas of research that have emerged during the past 5 years, including noninvasive brain stimulation during fMRI, resting-state functional connectivity, real-time fMRI, and neurofeedback. Written by the most prestigious experts in the field, the text is enhanced by numerous high-quality illustrations. This book will be valuable for neuroradiologists, neuroscientists, physicists, engineers, electrophysiologists, (neuro) medical scientists, neurologists, and neurophysiologists. Chapter 30 is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Author: Anna Elizabeth Macleod Forsyth
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
The success rate of clinical trials for central nervous system (CNS) drugs would be aided by improved identification of pharmacological biomarkers. Electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) are non-invasive methods with the potential to provide these objective measures of CNS drug action. Their simultaneous recording allows the combination of their opposing strengths and mitigation of their opposing weaknesses, including the utilisation of a direct electrophysiological measure of neural activity to help disentangle the neural and physiological contributions to the blood-oxygen-level-dependent (BOLD) signal. This thesis aimed to establish the feasibility and effectiveness of simultaneous EEG/fMRI when developing biomarkers for subanaesthetic ketamine and midazolam. Overall, analyses of drug-induced spectral power changes, functional connectivity, and working memory processes reflected prior literature where EEG and fMRI were recorded independently. This allowed confidence that simultaneous imaging was not degrading the data and combined with pre-processing data quality analyses provided evidence for the feasibility of simultaneous EEG/fMRI in a drug study. A recurrent theme throughout the analyses was that of each modality providing unique information. The spectral profiles and representations of working memory processes lacked a clear spatial correspondence between modalities, and formal comparisons of changes to functional connectomes yielded little conclusive evidence of simple relationships between the two signal types. The distinctive information imparted by both modalities instils impetus to develop drug biomarkers in both modalities. Combining information from the EEG and fMRI signals provided biomarker information over that gained from assessing the modalities independently. Temporal correlations between EEG power modulations and the BOLD signal were modified by drug administration. Additionally, comparison of the relative strengths of task-induced changes allowed for more in-depth analysis of the EEG/fMRI relationship. Furthermore, electrophysiological results combined with an assessment of multiple methods to remove BOLD signal artefacts endorsed an argument for tailoring pharmacological fMRI pre-processing to the unique noise structure of each drug under investigation. Combined with other advantages of concurrent recording, such as removing session-to-session variance, these results demonstrated that simultaneous EEG/fMRI is effective at providing information for the development of biomarkers of drug action.
Author: Christoph Mulert
Publisher: Springer Science & Business Media
ISBN: 3540879196
Category : Medical
Languages : en
Pages : 538
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Book Description
Functional magnetic resonance imaging (fMRI) and Electronecephalography (EEG) are very important and complementary modalities since fMRI offers high spatial resolution and EEG is a direct measurement of neuronal activity with high temporal resolution. Interest in the integration of both types of data is growing rapidly as it promises to provide important new insights into human brain activity as it has already done so in the field of epilepsy. The availability of good quality instrumentation capable of providing interference-free data in both modalities means that electrophysiological and haemodynamic characteristics of individual brain events can be captured for the first time. Consequently, it seems certain that the integration of fMRI and EEG will play an increasing role in neuroscience and of the clinical study of brain disorders such as epilepsy. The proposed book will discuss in detail the physiological principles, practical aspects of measurement, artefact reduction and analysis and also applications of the integration of fMRI and EEG. All applications, which are mainly in the fields of sleep research, cognitive neuroscience and clinical use in neurology and psychiatry will be reviewed.
Author: Nasim Shams
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Simultaneous acquisition of Electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) enables studying of brain function with high spatial resolution of fMRI and high temporal resolution of EEG. The complementary characteristics of the two modalities have made simultaneous EEG-fMRI into a rapidly growing neuroimaging technique with a wide range of cognitive and clinical applications. This thesis uses simultaneous EEG-fMRI to investigate the relationship between electrophysiological activity of the brain and the corresponding hemodynamic response during sensory processing of auditory and visual stimuli. Despite major improvements during the short history of EEG-fMRI, several technical and methodological challenges still remain. The main challenge in EEG-fMRI is the compromised EEG data quality. EEG data recorded inside the MR scanner is contaminated by artifacts caused by the MR magnetic fields. This thesis provides a comparative evaluation of the existing EEG artifact removal methods and proposes new analysis approaches to improve the EEG data quality. Another open question in the field of EEG-fMRI is the optimal choice of measures and techniques for data integration. This thesis proposes a new multivariate approach for EEG-fMRI data integration, which enables taking advantage of the full spectrum of the data available in two modalities. The proposed multivariate technique as well as conventional univariate methods are then used to explore the relationship between various aspects of the brainâ s electrophysiological activity (i.e. the transient evoked activity, oscillatory evoked activity and spontaneous oscillatory activity) and the associated hemodynamic response in auditory and visual cortices.
Author: Markus Ullsperger
Publisher: Oxford University Press
ISBN: 0190451777
Category : Medical
Languages : en
Pages : 336
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Book Description
One of the major challenges in science is to study and understand the human brain. Numerous methods examining different aspects of brain functions have been developed and employed. To study systemic interactions brain networks in vivo, non-invasive methods such as electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) have been used with great success. However, each of these methods can map only certain, quite selective aspects of brain function while missing others; and the inferences on neuronal processes and information flow are often rather indirect. To overcome these shortcomings of single methods, researchers have attempted to combine methods in order to make optimal use of their advantages while compensating their disadvantages. Hence, it is not surprising that soon after the introduction of fMRI as a neuroimaging method the possibilities of combinations with EEG have been explored. This book is intended to aid researchers who plan to set up a simultaneous EEG-fMRI laboratory and those who are interested in integrating electrophysiological and hemodynamic data. As will be obvious from the different chapters, this is a dynamically developing field in which several approaches are being tested, validated and compared. Currently, there is no one best solution for all problems available, but many promising techniques are emerging. This book shall give a comprehensive overview of these techniques. In addition, it points to open questions and directions for future research.
Author: Vinod Menon
Publisher: Frontiers E-books
ISBN: 2889190412
Category :
Languages : en
Pages : 212
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Book Description
Research on resting state brain activity using fMRI offers a novel approach for understanding brain organization at the systems level. Resting state fMRI examines spatial synchronization of intrinsic fluctuations in blood-oxygenation-level-dependent (BOLD) signals arising from neuronal and synaptic activity that is present in the absence of overt cognitive information processing. Since the discovery of coherent spontaneous fluctuations within the somatomotor system (Biswal, et al. 1995), a growing number of studies have shown that many of the brain areas engaged during various cognitive tasks also form coherent large-scale brain networks that can be readily identified using resting state fMRI. These studies are beginning to provide new insights into the functional architecture of the human brain. This Research Topic will synthesize current knowledge about resting state brain activity and discuss their implications for understanding brain function and dysfunction from a systems neuroscience perspective. This topic will also provide perspectives on important conceptual and methodological questions that the field needs to address in the next years. In addition to invited reviews and perspectives, we solicit research articles on theoretical, experimental and clinical questions related to the nature, origins and functions of resting state brain activity.
Author: Brunno Machado De Campos
Publisher: Frontiers Media SA
ISBN: 2889744388
Category : Medical
Languages : en
Pages : 184
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Book Description
Author: Joseph Chih-Chien Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
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Book Description
Introduction: Simultaneously recorded electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) using single band (SB) echo planar imaging is an established in vivo neuroimaging technique capable of providing unique insights into neural activity. The recent development of multiband fMRI (MB-fMRI) allows for faster sampling of neural activity with comparatively few drawbacks. However, simultaneous EEG/MB-fMRI has yet to be extensively validated for safety and potential data quality improvements. By using benchmark analysis methods, this study aimed to determine whether simultaneous EEG/MBfMRI is a safe and useful improvement over SB-fMRI. Methods: Initial pilot studies were first conducted to establish thermal safety and establish multiband factor choice. Following this, a main study simultaneously acquired EEG/fMRI on 16 participants (7 male, ages 20-39) who completed two sets of 16-minute resting-state and then two sets of 9-minute n-back task scans. Each set consisted of one MB and one SB pulse sequence with sequence type randomised within a set. Results: Thermometer measurements at the EEG electrode-skin interface showed similar heating profiles between the SB and MB scans. EEG analysis of both resting-state and task-based data showed similar data quality with no systematic differences in either EEG channel variances or spectral power. fMRI analysis showed few differences between MB and SB when analysing n-back data. However, MB showed large increases in statistical and spatial sensitivity in both fMRI resting-state and EEG/fMRI integration analyses. Discussion: Using EEG/MB-fMRI for certain tasks (e.g. n-back task) provides no particular advantages nor disadvantages. However, for studying the resting-state, MB-fMRI potentially allows for reduced scanning durations for equivalent statistical significance to be obtained or alternatively, improved significance for the same scanning duration. As such, simultaneous EEG/MB-fMRI is an attractive and viable alternative to SB-fMRI.
