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https://www.readbyqxmd.com/read/29321970/deepied-an-epileptic-discharge-detector-for-eeg-fmri-based-on-deep-learning
#1
Yongfu Hao, Hui Ming Khoo, Nicolas von Ellenrieder, Natalja Zazubovits, Jean Gotman
Presurgical evaluation that can precisely delineate the epileptogenic zone (EZ) is one important step for successful surgical resection treatment of refractory epilepsy patients. The noninvasive EEG-fMRI recording technique combined with general linear model (GLM) analysis is considered an important tool for estimating the EZ. However, the manual marking of interictal epileptic discharges (IEDs) needed in this analysis is challenging and time-consuming because the quality of the EEG recorded inside the scanner is greatly deteriorated compared to the usual EEG obtained outside the scanner...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29288994/detecting-sub-second-changes-in-brain-activation-patterns-during-interictal-epileptic-spike-using-simultaneous-eeg-fmri
#2
Epifanio Bagarinao, Satoshi Maesawa, Yuji Ito, Naotaka Usui, Jun Natsume, Hirohisa Watanabe, Minoru Hoshiyama, Toshihiko Wakabayashi, Gen Sobue, Shinji Naganawa, Haruo Isoda
OBJECTIVE: Epileptic spikes are associated with rapidly changing brain activation involving the epileptic foci and other brain regions in the "epileptic network". We aim to resolve these activation changes using simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) recordings. METHODS: Simultaneous EEG-fMRI recordings from 9 patients with epilepsy were used in the analysis. Our method employed the whole scalp EEG data to generate regressors for the analysis of fMRI data using the general linear model...
November 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29249950/non-linear-relationship-between-bold-activation-and-amplitude-of-beta-oscillations-in-the-supplementary-motor-area-during-rhythmic-finger-tapping-and-internal-timing
#3
Florian Gompf, Anja Pflug, Helmut Laufs, Christian A Kell
Functional imaging studies using BOLD contrasts have consistently reported activation of the supplementary motor area (SMA) both during motor and internal timing tasks. Opposing findings, however, have been shown for the modulation of beta oscillations in the SMA. While movement suppresses beta oscillations in the SMA, motor and non-motor tasks that rely on internal timing increase the amplitude of beta oscillations in the SMA. These independent observations suggest that the relationship between beta oscillations and BOLD activation is more complex than previously thought...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29246813/simultaneous-eeg-fmri-reveals-attention-dependent-coupling-of-early-face-processing-with-a-distributed-cortical-network
#4
Mareike Bayer, Michael T Rubens, Tom Johnstone
The speed of visual processing is central to our understanding of face perception. Yet the extent to which early visual processing influences later processing in distributed face processing networks, and the top-down modulation of such bottom-up effects, remains unclear. We used simultaneous EEG-fMRI to investigate cortical activity that showed unique covariation with ERP components of face processing (C1, P1, N170, P3), while manipulating sustained attention and transient cognitive conflict employing an emotional face-word Stroop task...
December 12, 2017: Biological Psychology
https://www.readbyqxmd.com/read/29196270/eeg-microstates-as-a-tool-for-studying-the-temporal-dynamics-of-whole-brain-neuronal-networks-a-review
#5
REVIEW
Christoph M Michel, Thomas Koenig
The present review discusses a well-established method for characterizing resting-state activity of the human brain using multichannel electroencephalography (EEG). This method involves the examination of electrical microstates in the brain, which are defined as successive short time periods during which the configuration of the scalp potential field remains semi-stable, suggesting quasi-simultaneity of activity among the nodes of large-scale networks. A few prototypic microstates, which occur in a repetitive sequence across time, can be reliably identified across participants...
November 28, 2017: NeuroImage
https://www.readbyqxmd.com/read/29191479/the-spatiotemporal-pattern-of-pure-tone-processing-a-single-trial-eeg-fmri-study
#6
Qiang Li, Guangyuan Liu, Dongtao Wei, Jing Guo, Guangjie Yuan, Shifu Wu
Although considerable research has been published on pure tone processing, its spatiotemporal pattern is not well understood. Specifically, the link between neural activity in the auditory pathway measured by functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) markers of pure tone processing in the P1, N1, P2, and N4 components is not well established. In this study, we used single-trial EEG-fMRI as a multi-modal fusion approach to integrate concurrently acquired EEG and fMRI data, in order to understand the spatial and temporal aspects of the pure tone processing pathway...
November 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/29170853/brain-networks-are-independently-modulated-by-donepezil-sleep-and-sleep-deprivation
#7
Jonathan Wirsich, Marc Rey, Maxime Guye, Christian Bénar, Laura Lanteaume, Ben Ridley, Sylviane Confort-Gouny, Catherine Cassé-Perrot, Elisabeth Soulier, Patrick Viout, Franck Rouby, Marie-Noëlle Lefebvre, Christine Audebert, Romain Truillet, Elisabeth Jouve, Pierre Payoux, David Bartrés-Faz, Régis Bordet, Jill C Richardson, Claudio Babiloni, Paolo Maria Rossini, Joelle Micallef, Olivier Blin, Jean-Philippe Ranjeva
Resting-state connectivity has been widely studied in the healthy and pathological brain. Less well-characterized are the brain networks altered during pharmacological interventions and their possible interaction with vigilance. In the hopes of finding new biomarkers which can be used to identify cortical activity and cognitive processes linked to the effects of drugs to treat neurodegenerative diseases such as Alzheimer's disease, the analysis of networks altered by medication would be particularly interesting...
November 23, 2017: Brain Topography
https://www.readbyqxmd.com/read/29163087/localized-fluctuant-oscillatory-activity-by-working-memory-load-a-simultaneous-eeg-fmri-study
#8
Xiaojie Zhao, Xiaoyun Li, Li Yao
Working memory (WM) is a resource-limited memory system for temporary storage and processing of brain information during the execution of cognitive tasks. Increased WM load will increase the amount and difficulty of memory information. Several studies have used electroencephalography (EEG) or functional magnetic resonance imaging (fMRI) to explore load-dependent cognition processing according to the time courses of electrophysiological activity or the spatial pattern of blood oxygen metabolic activity. However, the relationships between these two activities and the underlying neural mechanism are still unclear...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29124547/online-reduction-of-artifacts-in-eeg-of-simultaneous-eeg-fmri-using-reference-layer-adaptive-filtering-rlaf
#9
David Steyrl, Gunther Krausz, Karl Koschutnig, Günter Edlinger, Gernot R Müller-Putz
Simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) allow us to study the active human brain from two perspectives concurrently. Signal processing based artifact reduction techniques are mandatory for this, however, to obtain reasonable EEG quality in simultaneous EEG-fMRI. Current artifact reduction techniques like average artifact subtraction (AAS), typically become less effective when artifact reduction has to be performed on-the-fly. We thus present and evaluate a new technique to improve EEG quality online...
November 9, 2017: Brain Topography
https://www.readbyqxmd.com/read/29118108/network-configurations-in-the-human-brain-reflect-choice-bias-during-rapid-face-processing
#10
Tao Tu, Noam Schneck, Jordan Muraskin, Paul Sajda
Network interactions are likely to be instrumental in processes underlying rapid perception and cognition. Specifically, high-level and perceptual regions must interact to balance pre-existing models of the environment with new incoming stimuli. Simultaneous EEG/fMRI allows for the temporal characterization of brain-network interactions combined with improved anatomical localization of regional activity. In this paper we use simultaneous EEG/fMRI and multivariate dynamical systems (MDS) analysis to characterize network relationships between constitute brain areas that reflect a subject's choice for a face versus non-face categorization task...
November 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29081259/brain-activation-associated-with-eccentric-movement-a-narrative-review-of-the-literature
#11
Stéphane Perrey
The movement occurring when a muscle exerts tension while lengthening is known as eccentric muscle action. Literature contains limited evidence on how our brain controls eccentric movement. However, how the cortical regions in the motor network are activated during eccentric muscle actions may be critical for understanding the underlying control mechanism of eccentric movements encountered in daily tasks. This is a novel topic that has only recently begun to be investigated through advancements in neuroimaging methods (electroencephalography, EEG; functional magnetic resonance imaging, fMRI)...
October 29, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29061698/the-right-temporoparietal-junction-supports-speech-tracking-during-selective-listening-evidence-from-concurrent-eeg-fmri
#12
Sebastian Puschmann, Simon Steinkamp, Imke Gillich, Bojana Mirkovic, Stefan Debener, Christiane M Thiel
Listening selectively to one out of several competing speakers in a "cocktail party" situation is a highly demanding task. It relies on a widespread cortical network, including auditory sensory but also frontal and parietal brain regions involved in controlling auditory attention. Previous work has shown that, during selective listening, ongoing neural activity in auditory sensory areas is dominated by the attended speech stream, whereas competing input is suppressed. The relationship between these attentional modulations in the sensory tracking of the attended speech stream and frontoparietal activity during selective listening is however not understood...
October 23, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29060422/correlated-alpha-activity-with-the-facial-expression-processing-network-in-a-simultaneous-eeg-fmri-experiment
#13
Marco Simoes, Bruno Direito, Joao Lima, Joao Castelhano, Carlos Ferreira, Ricardo Couceiro, Paulo Carvalho, Miguel Castelo-Branco
The relationship between EEG and fMRI data is poorly covered in the literature. Extensive work has been conducted in resting-state and epileptic activity, highlighting a negative correlation between the alpha power band of the EEG and the BOLD activity in the default-mode-network. The identification of an appropriate task-specific relationship between fMRI and EEG data for predefined regions-of-interest, would allow the transfer of interventional paradigms (such as BOLD-based neurofeedback sessions) from fMRI to EEG, enhancing its application range by lowering its costs and improving its flexibility...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29056904/early-changes-in-alpha-band-power-and-dmn-bold-activity-in-alzheimer-s-disease-a-simultaneous-resting-state-eeg-fmri-study
#14
Katharina Brueggen, Carmen Fiala, Christoph Berger, Sina Ochmann, Claudio Babiloni, Stefan J Teipel
Simultaneous resting state functional magnetic resonance imaging (rsfMRI)-resting state electroencephalography (rsEEG) studies in healthy adults showed robust positive associations of signal power in the alpha band with BOLD signal in the thalamus, and more heterogeneous associations in cortical default mode network (DMN) regions. Negative associations were found in occipital regions. In Alzheimer's disease (AD), rsfMRI studies revealed a disruption of the DMN, while rsEEG studies consistently reported a reduced power within the alpha band...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29022116/two-dimensional-temporal-clustering-analysis-for-patients-with-epilepsy-detecting-epilepsy-related-information-in-eeg-fmri-concordant-discordant-and-spike-less-patients
#15
Danilo Maziero, Tonicarlo R Velasco, Carlos E G Salmon, Victoria L Morgan
EEG acquired simultaneously with fMRI (EEG-fMRI) is a multimodal method that has shown promise in mapping the seizure onset zone in patients with focal epilepsy. However, there are many instances when this method is unsuccessful or not applicable, and other data driven fMRI methods may be utilized. One such method is the two-dimensional temporal clustering analysis (2dTCA). In this study we compared the classic EEG-fMRI and 2dTCA performance in mapping regions related to the seizure onset region in 18 focal epilepsy patients (12 presenting interictal epileptiform discharges (IEDs), during EEG-fMRI acquisition) with Engel I or II surgical outcome...
October 11, 2017: Brain Topography
https://www.readbyqxmd.com/read/28984525/brain-networks-related-to-beta-oscillatory-activity-during-episodic-memory-retrieval
#16
Erika Nyhus
Evidence from fMRI has consistently located a widespread network of frontal, parietal, and temporal lobe regions during episodic retrieval. However, the temporal limitations of the fMRI methodology have made it difficult to assess the transient network dynamics by which these distributed regions coordinate activity. Recent evidence suggests that beta oscillations (17-20 Hz) are important for top-down control for memory suppression. However, the spatial limitations of the EEG methodology make it difficult to assess the relationship between these oscillatory signals and the distributed networks identified with fMRI...
October 6, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28928648/a-single-session-of-rtms-enhances-small-worldness-in-writer-s-cramp-evidence-from-simultaneous-eeg-fmri-multi-modal-brain-graph
#17
Rose D Bharath, Rajanikant Panda, Venkateswara Reddy Reddam, M V Bhaskar, Suril Gohel, Sujas Bhardwaj, Arvind Prajapati, Pramod Kumar Pal
Background and Purpose: Repetitive transcranial magnetic stimulation (rTMS) induces widespread changes in brain connectivity. As the network topology differences induced by a single session of rTMS are less known we undertook this study to ascertain whether the network alterations had a small-world morphology using multi-modal graph theory analysis of simultaneous EEG-fMRI. Method: Simultaneous EEG-fMRI was acquired in duplicate before (R1) and after (R2) a single session of rTMS in 14 patients with Writer's Cramp (WC)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28923408/altered-functional-connectivity-in-mesial-temporal-lobe-epilepsy
#18
Hana Burianová, Nahla L Faizo, Marcus Gray, Julia Hocking, Graham Galloway, David Reutens
Growing evidence of altered functional connectivity suggests that mesial temporal lobe epilepsy (mTLE) alters not only hippocampal networks, but also a number of resting state networks. These highly coherent, yet functionally distinct brain circuits interact dynamically with each other in order to mediate consciousness, memory, and attention. However, little is currently known about the modulation of these networks by epileptiform activity, such as interictal spikes and seizures. The objective of the study was to use simultaneous EEG-fMRI to investigate functional connectivity in three resting state networks: default mode network (DMN), salience network (SN), and dorsal attentional network (DAN) in patients with mTLE compared to a healthy cohort, and in relation to the onset of interictal spikes and the period immediately prior to the spikes...
September 8, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28914659/relationship-between-alpha-rhythm-and-the-default-mode-network-an-eeg-fmri-study
#19
Anthony D Bowman, Joseph C Griffis, Kristina M Visscher, Allan C Dobbins, Timothy J Gawne, Mark W DiFrancesco, Jerzy P Szaflarski
PURPOSE: Reports of the relationship between the default mode network (DMN) and alpha power are conflicting. Our goal was to assess this relationship by analyzing concurrently obtained EEG/functional MRI data using hypothesis-independent methods. METHODS: We collected functional MRI and EEG data during eyes-closed rest in 20 participants aged 19 to 37 (10 females) and performed independent component analysis on the functional MRI data and a Hamming-windowed fast Fourier transform on the EEG data...
September 13, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28893378/localization-of-spontaneous-bursting-neuronal-activity-in-the-preterm-human-brain-with-simultaneous-eeg-fmri
#20
Tomoki Arichi, Kimberley Whitehead, Giovanni Barone, Ronit Pressler, Francesco Padormo, A David Edwards, Lorenzo Fabrizi
Electroencephalographic recordings from the developing human brain are characterized by spontaneous neuronal bursts, the most common of which is the delta brush. Although similar events in animal models are known to occur in areas of immature cortex and drive their development, their origin in humans has not yet been identified. Here, we use simultaneous EEG-fMRI to localise the source of delta brush events in 10 preterm infants aged 32-36 postmenstrual weeks. The most frequent patterns were left and right posterior-temporal delta brushes which were associated in the left hemisphere with ipsilateral BOLD activation in the insula only; and in the right hemisphere in both the insular and temporal cortices...
September 12, 2017: ELife
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