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https://www.readbyqxmd.com/read/28384197/the-influence-of-corticospinal-activity-on-tms-evoked-activity-and-connectivity-in-healthy-subjects-a-tms-eeg-study
#1
Sara Petrichella, Nessa Johnson, Bin He
Combined transcranial magnetic stimulation (TMS) and electroencephalography (EEG) can be used to analyze cortical reactivity and connectivity. However, the effects of corticospinal and peripheral muscle activity on TMS-evoked potentials (TEPs) are not well understood. The aim of this paper is to evaluate the relationship between cortico-spinal activity, in the form of peripheral motor-evoked potentials (MEPs), and the TEPs from motor areas, along with the connectivity among activated brain areas. TMS was applied to left and right motor cortex (M1), separately, at motor threshold while multi-channel EEG responses were recorded in 17 healthy human subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28379529/reduced-short-latency-afferent-inhibition-in-prefrontal-but-not-motor-cortex-and-its-association-with-executive-function-in-schizophrenia-a-combined-tms-eeg-study
#2
Yoshihiro Noda, Mera S Barr, Reza Zomorrodi, Robin F H Cash, Tarek K Rajji, Faranak Farzan, Robert Chen, Tony P George, Zafiris J Daskalakis, Daniel M Blumberger
BACKGROUND: Cholinergic dysfunction is increasingly assumed to be involved in the pathophysiology of schizophrenia. Short-latency afferent inhibition (SAI) is a transcranial magnetic stimulation (TMS) paradigm that has been shown to assay central cholinergic activity from the motor cortex (M1). Recently, we established a method to index SAI from the dorsolateral prefrontal cortex (DLPFC), an area implicated in the pathophysiology of schizophrenia. We investigated SAI in M1 and DLPFC in schizophrenia...
April 1, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28323091/age-related-differences-in-functional-synchronization-of-eeg-activity-as-evaluated-by-means-of-tms-eeg-coregistrations
#3
Florinda Ferreri, Fabrizio Vecchio, Andrea Guerra, Francesca Miraglia, David Ponzo, Luca Vollero, Giulio Iannello, Sara Maatta, Esa Mervaala, Paolo Maria Rossini, Vincenzo Di Lazzaro
It was recently demonstrated that the characteristics of EEG rhythms preceding a transcranial magnetic stimulation (TMS) of the motor cortex (M1) influence the motor-evoked potential (MEP) amplitude with a peculiar pattern, thus reflecting the M1 functional state. As physiological aging is related to a decrease in motor performance and changes in excitability and connectivity strength within cerebral sensorimotor circuits, we aimed to explore whether aging affects EEG-MEP interactions. Using MRI-navigated TMS and multichannel EEG, we compared the EEG-MEP interactions observed in healthy aged subjects with those observed in young volunteers...
March 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28274831/effects-of-prefrontal-bipolar-and-high-definition-transcranial-direct-current-stimulation-on-cortical-reactivity-and-working-memory-in-healthy-adults
#4
Aron T Hill, Nigel C Rogasch, Paul B Fitzgerald, Kate E Hoy
Transcranial direct current stimulation (tDCS) is a well-recognised neuromodulatory technology which has been shown to induce short-lasting changes in motor-cortical excitability. The recent and rapid expansion of tDCS into the cognitive domain, however, necessitates deeper mechanistic understanding of its neurophysiological effects over non-motor brain regions. The present study utilised transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) to probe the immediate and longer-term effects of both a bipolar (BP-tDCS) and more focal 4×1 High-Definition tDCS (HD-tDCS) montage applied over the left DLPFC on TMS-evoked potentials (TEPs) and oscillations in 19 healthy adult participants...
March 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28268490/channel-interpolation-in-tms-eeg-a-quantitative-study-towards-an-accurate-topographical-representation
#5
S Petrichella, L Vollere, F Ferreri, A Guerra, S Maatta, M Kononen, V Di Lazzaro, G Iannello
The co-registration of transcranial magnetic stimulation and electroencephalography (TMS-EEG) is emerging as a successful technique for causally exploring cortical mechanisms and connections. However, various artefacts could affect TMS-EEG signals. Correct artefacted channels reconstruction is crucial to obtain accurate topographical representation and consequently accurate inverse problem solution, in order to map in a proper way the global brain responses after the stimulation of one particular brain region of interest...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226664/channel-interpolation-in-tms-eeg-a-quantitative-study-towards-an-accurate-topographical-representation
#6
S Petrichella, L Vollere, F Ferreri, A Guerra, S Maatta, M Kononen, V Di Lazzaro, G Iannello, S Petrichella, L Vollere, F Ferreri, A Guerra, S Maatta, M Kononen, V Di Lazzaro, G Iannello, S Petrichella, M Kononen, G Iannello, A Guerra, S Maatta, V Di Lazzaro, F Ferreri
The co-registration of transcranial magnetic stimulation and electroencephalography (TMS-EEG) is emerging as a successful technique for causally exploring cortical mechanisms and connections. However, various artefacts could affect TMS-EEG signals. Correct artefacted channels reconstruction is crucial to obtain accurate topographical representation and consequently accurate inverse problem solution, in order to map in a proper way the global brain responses after the stimulation of one particular brain region of interest...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28215463/markers-of-tms-evoked-visual-conscious-experience-in-a-patient-with-altitudinal-hemianopia
#7
Chiara Mazzi, Gaetano Mazzeo, Silvia Savazzi
Transcranial magnetic stimulation (TMS) of the occipital and parietal cortices can induce phosphenes, i.e. visual sensations of light without light entering the eyes. In this paper, we adopted a TMS-EEG interactive co-registration approach with a patient (AM) showing altitudinal hemianopia. Occipital and parietal cortices in both hemispheres were stimulated while concurrently recording EEG signal. Results showed that, for all sites, neural activity differentially encoding for the presence vs. absence of a conscious experience could be found in a cluster of electrodes close to the stimulation site at an early (70ms) time-period after TMS...
February 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28209926/characterization-of-the-influence-of-age-on-gabaa-and-glutamatergic-mediated-functions-in-the-dorsolateral-prefrontal-cortex-using-paired-pulse-tms-eeg
#8
Yoshihiro Noda, Reza Zomorrodi, Robin F H Cash, Mera S Barr, Faranak Farzan, Tarek K Rajji, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
Gamma-aminobutyric acid (GABA)ergic and glutamatergic neurotransmissions in the prefrontal cortex decreases with age. Further, cognitive function mediated through the dorsolateral prefrontal cortex (DLPFC) also declines with age. Although neuroimaging studies have demonstrated decreased levels of these substances, direct neurophysiological data investigating the effect of aging in the DLPFC in human subjects is lacking. The advent of transcranial magnetic stimulation (TMS) combined with electroencephalography (EEG) has allowed for the assessment of functional neurotransmission in vivo...
February 16, 2017: Aging
https://www.readbyqxmd.com/read/28092972/tracking-dynamic-interactions-between-structural-and-functional-connectivity-a-tms-eeg-dmri-study
#9
Enrico Amico, Olivier Bodart, Mario Rosanova, Olivia Gosseries, Lizette Heine, Pieter Van Mierlo, Charlotte Martial, Marcello Massimini, Daniele Marinazzo, Steven Laureys
Transcranial magnetic stimulation (TMS) in combination with neuroimaging techniques allows to measure the effects of a direct perturbation of the brain. When coupled with high-density electroencephalography (TMS/hd-EEG), TMS pulses revealed electrophysiological signatures of different cortical modules in health and disease. However, the neural underpinnings of these signatures remain unclear. Here, by applying multimodal analyses of cortical response to TMS recordings and diffusion magnetic resonance imaging (dMRI) tractography, we investigated the relationship between functional and structural features of different cortical modules in a cohort of awake healthy volunteers...
March 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28049075/abnormal-brain-oscillations-persist-after-recovery-from-bipolar-depression
#10
P Canali, S Casarotto, M Rosanova, G Sferrazza-Papa, A G Casali, O Gosseries, M Massimini, E Smeraldi, C Colombo, F Benedetti
When directly perturbed in healthy subjects, premotor cortical areas generate electrical oscillations in the beta range (20-40Hz). In schizophrenia, major depressive disorder and bipolar disorder (BD), these oscillations are markedly reduced, in terms of amplitude and frequency. However, it still remains unclear whether these abnormalities can be modulated over time, or if they can be still observed after treatment. Here, we employed transcranial magnetic stimulation (TMS) combined with EEG to assess the frontal oscillatory activity in eighteen BD patients before/after antidepressant treatments (sleep deprivation and light therapy), relative to nine healthy controls...
March 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28008690/heavy-alcohol-use-in-adolescence-is-associated-with-altered-cortical-activity-a-combined-tms-eeg-study
#11
Outi Kaarre, Elisa Kallioniemi, Mervi Könönen, Tommi Tolmunen, Virve Kekkonen, Petri Kivimäki, Noora Heikkinen, Florinda Ferreri, Eila Laukkanen, Sara Määttä
Long-term alcohol use affects cognitive and neurophysiological functioning as well as structural brain development. Combining simultaneous electroencephalogram (EEG) recording with transcranial magnetic stimulation (TMS) enables direct, in vivo exploration of cortical excitability and assessment of effective and functional connectivity. In the central nervous system, the effects of alcohol are particularly mediated by alterations in gamma-aminobutyric acid (GABA)ergic neurotransmission, and TMS-evoked potentials (TEPs) N45 and N100 in EEG are known to reflect GABAergic function...
December 23, 2016: Addiction Biology
https://www.readbyqxmd.com/read/28007469/tms-combined-with-eeg-in-genetic-generalized-epilepsy-a-phase-ii-diagnostic-accuracy-study
#12
Vasilios K Kimiskidis, Alkiviadis Tsimpiris, Philippe Ryvlin, Reetta Kalviainen, Michalis Koutroumanidis, Antonio Valentin, Nikolaos Laskaris, Dimitris Kugiumtzis
OBJECTIVES: (A) To develop a TMS-EEG stimulation and data analysis protocol in genetic generalized epilepsy (GGE). (B) To investigate the diagnostic accuracy of TMS-EEG in GGE. METHODS: Pilot experiments resulted in the development and optimization of a paired-pulse TMS-EEG protocol at rest, during hyperventilation (HV), and post-HV combined with multi-level data analysis. This protocol was applied in 11 controls (C) and 25 GGE patients (P), further dichotomized into responders to antiepileptic drugs (R, n=13) and non-responders (n-R, n=12)...
February 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27965543/controllable-pulse-parameter-tms-and-tms-eeg-as-novel-approaches-to-improve-neural-targeting-with-rtms-in-human-cerebral-cortex
#13
Ricci Hannah, Lorenzo Rocchi, Sara Tremblay, John C Rothwell
No abstract text is available yet for this article.
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27927951/effects-of-the-selective-%C3%AE-5-gabaar-antagonist-s44819-on-excitability-in-the-human-brain-a-tms-emg-and-tms-eeg-phase-i-study
#14
Ghazaleh Darmani, Carl M Zipser, Gabriele M Böhmer, Karine Deschet, Florian Müller-Dahlhaus, Paolo Belardinelli, Matthias Schwab, Ulf Ziemann
Alpha-5 gamma-aminobutyric acid type A receptors (α5-GABAARs) are located extrasynaptically, regulate neuronal excitability through tonic inhibition, and are fundamentally important for processes such as plasticity and learning. For example, pharmacological blockade of α5-GABAAR in mice with ischemic stroke improved recovery of function by normalizing exaggerated perilesional α5-GABAAR-dependent tonic inhibition. S44819 is a novel competitive selective antagonist of the α5-GABAAR at the GABA-binding site...
December 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27812319/evaluating-the-effect-of-repetitive-transcranial-magnetic-stimulation-on-disorders-of-consciousness-by-using-tms-eeg
#15
Yang Bai, Xiaoyu Xia, Jiannan Kang, Xiaoxiao Yin, Yi Yang, Jianghong He, Xiaoli Li
Background: The modulation efficacy of Transcranial magnetic stimulation (TMS) on consciousness improvement of patient with disorder of consciousness (DOC) has not been definitely confirmed. Objective: This study proposes TMS-EEG to assess effects of repetitive TMS (rTMS) on brain modulation of DOC. Methods: Twenty sessions of 10 Hz rTMS were applied over the dorsolateral prefrontal cortex for a patient with DOC. Measures of Coma Recovery Scale-Revised (CRS-R) score, TMS-evoked potential (TEP), perturbation complexity index (PCI), and global mean field power (GMFP) were used to evaluate the consciousness level of the patient at three intervals: before the rTMS protocol (T0), immediately after one session rTMS (T1), and immediately after 20 sessions (T2)...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27808418/lamotrigine-and-levetiracetam-exert-a-similar-modulation-of-tms-evoked-eeg-potentials
#16
Isabella Premoli, Andrea Biondi, Sara Carlesso, Davide Rivolta, Mark P Richardson
OBJECTIVE: Antiepileptic drug (AED) treatment failures may occur because there is insufficient drug in the brain or because of a lack of relevant therapeutic response. Until now it has not been possible to measure these factors. It has been recently shown that the combination of transcranial magnetic stimulation and electroencephalography (TMS-EEG) can measure the effects of drugs in healthy volunteers. TMS-evoked EEG potentials (TEPs) comprise a series of positive and negative deflections that can be specifically modulated by drugs with a well-known mode of action targeting inhibitory neurotransmission...
January 2017: Epilepsia
https://www.readbyqxmd.com/read/27789211/corrigendum-to-brain-activity-underlying-visual-perception-and-attention-as-inferred-from-tms-eeg-a-review-brain-stimulation-5-2012-124-129
#17
Paul C Taylor, Gregor Thut
No abstract text is available yet for this article.
October 17, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27788128/reduction-hybrid-artifacts-of-emg-eog-in-electroencephalography-evoked-by-prefrontal-transcranial-magnetic-stimulation
#18
Yang Bai, Xiaohong Wan, Ke Zeng, Yinmei Ni, Lirong Qiu, Xiaoli Li
OBJECTIVE: When prefrontal-transcranial magnetic stimulation (p-TMS) performed, it may evoke hybrid artifact mixed with muscle activity and blink activity in EEG recordings. Reducing this kind of hybrid artifact challenges the traditional preprocessing methods. We aim to explore method for the p-TMS evoked hybrid artifact removal. APPROACH: We propose a novel method used as independent component analysis (ICA) post processing to reduce the p-TMS evoked hybrid artifact...
December 2016: Journal of Neural Engineering
https://www.readbyqxmd.com/read/27774054/tmseeg-a-matlab-based-graphical-user-interface-for-processing-electrophysiological-signals-during-transcranial-magnetic-stimulation
#19
Sravya Atluri, Matthew Frehlich, Ye Mei, Luis Garcia Dominguez, Nigel C Rogasch, Willy Wong, Zafiris J Daskalakis, Faranak Farzan
Concurrent recording of electroencephalography (EEG) during transcranial magnetic stimulation (TMS) is an emerging and powerful tool for studying brain health and function. Despite a growing interest in adaptation of TMS-EEG across neuroscience disciplines, its widespread utility is limited by signal processing challenges. These challenges arise due to the nature of TMS and the sensitivity of EEG to artifacts that often mask TMS-evoked potentials (TEP)s. With an increase in the complexity of data processing methods and a growing interest in multi-site data integration, analysis of TMS-EEG data requires the development of a standardized method to recover TEPs from various sources of artifacts...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27771347/analysing-concurrent-transcranial-magnetic-stimulation-and-electroencephalographic-data-a-review-and-introduction-to-the-open-source-tesa-software
#20
REVIEW
Nigel C Rogasch, Caley Sullivan, Richard H Thomson, Nathan S Rose, Neil W Bailey, Paul B Fitzgerald, Faranak Farzan, Julio C Hernandez-Pavon
The concurrent use of transcranial magnetic stimulation with electroencephalography (TMS-EEG) is growing in popularity as a method for assessing various cortical properties such as excitability, oscillations and connectivity. However, this combination of methods is technically challenging, resulting in artifacts both during recording and following typical EEG analysis methods, which can distort the underlying neural signal. In this article, we review the causes of artifacts in EEG recordings resulting from TMS, as well as artifacts introduced during analysis (e...
February 15, 2017: NeuroImage
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