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https://www.readbyqxmd.com/read/27812319/evaluating-the-effect-of-repetitive-transcranial-magnetic-stimulation-on-disorders-of-consciousness-by-using-tms-eeg
#1
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
#2
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...
November 3, 2016: 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
#3
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
#4
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
#5
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
#6
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...
October 19, 2016: NeuroImage
https://www.readbyqxmd.com/read/27769831/corrigendum-to-the-right-angular-gyrus-combines-perceptual-and-response-related-expectancies-in-visual-search-tms-eeg-evidence-brain-stimulation-8-2015-816-22
#7
Francesca Bocca, Thomas Töllner, Hermann J Müller, Paul C Taylor
No abstract text is available yet for this article.
October 14, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27713691/characterizing-and-modulating-brain-circuitry-through-transcranial-magnetic-stimulation-combined-with-electroencephalography
#8
Faranak Farzan, Marine Vernet, Mouhsin M D Shafi, Alexander Rotenberg, Zafiris J Daskalakis, Alvaro Pascual-Leone
The concurrent combination of transcranial magnetic stimulation (TMS) with electroencephalography (TMS-EEG) is a powerful technology for characterizing and modulating brain networks across developmental, behavioral, and disease states. Given the global initiatives in mapping the human brain, recognition of the utility of this technique is growing across neuroscience disciplines. Importantly, TMS-EEG offers translational biomarkers that can be applied in health and disease, across the lifespan, and in humans and animals, bridging the gap between animal models and human studies...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27660540/exploring-cortical-plasticity-and-oscillatory-brain-dynamics-via-transcranial-magnetic-stimulation-and-resting-state-electroencephalogram
#9
REVIEW
Nor Azila Noh
Transcranial magnetic stimulation (TMS) is a non-invasive, non-pharmacological technique that is able to modulate cortical activity beyond the stimulation period. The residual aftereffects are akin to the plasticity mechanism of the brain and suggest the potential use of TMS for therapy. For years, TMS has been shown to transiently improve symptoms of neuropsychiatric disorders, but the underlying neural correlates remain elusive. Recently, there is evidence that altered connectivity of brain network dynamics is the mechanism underlying symptoms of various neuropsychiatric illnesses...
July 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/27570187/investigating-tms-eeg-indices-of-long-interval-intracortical-inhibition-at-different-interstimulus-intervals
#10
George M Opie, Nigel C Rogasch, Mitchell R Goldsworthy, Michael C Ridding, John G Semmler
BACKGROUND: Long-interval intracortical inhibition (LICI) is a transcranial magnetic stimulation (TMS) paradigm that uses paired magnetic stimuli separated by 100-200 ms to investigate the activity of cortical GABAergic interneurons. While commonly applied, the mechanisms contributing to LICI are not well understood, and growing evidence suggests that inhibition observed at different interstimulus intervals (ISI) may involve non-identical processes. OBJECTIVE: This study aims to utilise combined TMS-EEG to more thoroughly characterise LICI at different ISIs, as the TMS-evoked EEG potential (TEP) can provide more direct insight into the cortical response to stimulation that is not subject to variations in spinal cord excitability that can confound the motor evoked potential (MEP)...
August 8, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27529410/fractionation-of-parietal-function-in-bistable-perception-probed-with-concurrent-tms-eeg
#11
Georg Schauer, Acer Chang, David Schwartzman, Charlotte L Rae, Heather Iriye, Anil K Seth, Ryota Kanai
When visual input has conflicting interpretations, conscious perception can alternate spontaneously between these possible interpretations. This is called bistable perception. Previous neuroimaging studies have indicated the involvement of two right parietal areas in resolving perceptual ambiguity (ant-SPLr and post-SPLr). Transcranial magnetic stimulation (TMS) studies that selectively interfered with the normal function of these regions suggest that they play opposing roles in this type of perceptual switch...
2016: Scientific Data
https://www.readbyqxmd.com/read/27491799/consciousness-and-cortical-responsiveness-a-within-state-study-during-non-rapid-eye-movement-sleep
#12
Jaakko O Nieminen, Olivia Gosseries, Marcello Massimini, Elyana Saad, Andrew D Sheldon, Melanie Boly, Francesca Siclari, Bradley R Postle, Giulio Tononi
When subjects become unconscious, there is a characteristic change in the way the cerebral cortex responds to perturbations, as can be assessed using transcranial magnetic stimulation and electroencephalography (TMS-EEG). For instance, compared to wakefulness, during non-rapid eye movement (NREM) sleep TMS elicits a larger positive-negative wave, fewer phase-locked oscillations, and an overall simpler response. However, many physiological variables also change when subjects go from wake to sleep, anesthesia, or coma...
August 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27488504/resting-state-brain-dynamics-and-its-transients-a-combined-tms-eeg-study
#13
Mireille Bonnard, Sophie Chen, Jérôme Gaychet, Marcel Carrere, Marmaduke Woodman, Bernard Giusiano, Viktor Jirsa
The brain at rest exhibits a spatio-temporally rich dynamics which adheres to systematic behaviours that persist in task paradigms but appear altered in disease. Despite this hypothesis, many rest state paradigms do not act directly upon the rest state and therefore cannot confirm hypotheses about its mechanisms. To address this challenge, we combined transcranial magnetic stimulation (TMS) and electroencephalography (EEG) to study brain's relaxation toward rest following a transient perturbation. Specifically, TMS targeted either the medial prefrontal cortex (MPFC), i...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27461082/characterisation-of-glutamatergic-and-gabaa-mediated-neurotransmission-in-motor-and-dorsolateral-prefrontal-cortex-using-paired-pulse-tms-eeg
#14
Robin Fh Cash, Yoshihiro Noda, Reza Zomorrodi, Natasha Radhu, Faranak Farzan, Tarek K Rajji, Paul B Fitzgerald, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
Short interval intracortical inhibition (SICI) and intracortical facilitation (ICF) are non-invasive transcranial magnetic stimulation (TMS) measures of GABAA receptor mediated inhibition and glutamatergic excitatory transmission respectively. Conventionally these measures have been restricted to the motor cortex. We investigated whether SICI and ICF could be recorded from dorsolateral prefrontal cortex (DLPFC) using combined TMS and electroencephalography (TMS-EEG). We first characterized the neural signature of SICI and ICF in M1 in terms of TMS evoked potentials (TEPs) and spectral power modulation...
July 27, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27291496/recovering-tms-evoked-eeg-responses-masked-by-muscle-artifacts
#15
Tuomas P Mutanen, Matleena Kukkonen, Jaakko O Nieminen, Matti Stenroos, Jukka Sarvas, Risto J Ilmoniemi
Combined transcranial magnetic stimulation (TMS) and electroencephalography (EEG) often suffers from large muscle artifacts. Muscle artifacts can be removed using signal-space projection (SSP), but this can make the visual interpretation of the remaining EEG data difficult. We suggest to use an additional step after SSP that we call source-informed reconstruction (SIR). SSP-SIR improves substantially the signal quality of artifactual TMS-EEG data, causing minimal distortion in the neuronal signal components...
June 9, 2016: NeuroImage
https://www.readbyqxmd.com/read/27284688/single-pulse-transcranial-magnetic-stimulation-electroencephalogram-reveals-no-electrophysiological-abnormality-in-adults-with-high-functioning-autism-spectrum-disorder
#16
Melissa Kirkovski, Nigel C Rogasch, Takashi Saeki, Bernadette M Fitzgibbon, Peter G Enticott, Paul B Fitzgerald
OBJECTIVE: Neuroimaging and electrophysiological research have revealed a range of neural abnormalities in autism spectrum disorder (ASD), but a comprehensive understanding remains elusive. We utilized a novel methodology among individuals with ASD and matched controls, combining transcranial magnetic stimulation (TMS) with concurrent electroencephalogram (EEG) recording (TMS-EEG) to explore cortical function and connectivity in three sites implicated in the neuropathophysiology of ASD (dorsolateral prefrontal cortex, primary motor cortex, and temporoparietal junction)...
September 2016: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/27226450/a-combined-tms-eeg-study-of-short-latency-afferent-inhibition-in-the-motor-and-dorsolateral-prefrontal-cortex
#17
Yoshihiro Noda, Robin F H Cash, Reza Zomorrodi, Luis Garcia Dominguez, Faranak Farzan, Tarek K Rajji, Mera S Barr, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
Combined transcranial magnetic stimulation and electroencephalography (TMS-EEG) enables noninvasive neurophysiological investigation of the human cortex. A TMS paradigm of short-latency afferent inhibition (SAI) is characterized by attenuation of the motor-evoked potential (MEP) and modulation of N100 of the TMS-evoked potential (TEP) when TMS is delivered to motor cortex (M1) following median nerve stimulation. SAI is a marker of cholinergic activity in the motor cortex; however, the SAI has not been tested from the prefrontal cortex...
September 1, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27177879/maturation-of-interhemispheric-signal-propagation-in-autism-spectrum-disorder-and-typically-developing-controls-a-tms-eeg-study
#18
Tomasz A Jarczok, Merve Fritsch, Anne Kröger, Anna Lisa Schneider, Heike Althen, Michael Siniatchkin, Christine M Freitag, Stephan Bender
Brain maturation from childhood to adulthood is associated with changes in structural and functional connectivity between remote brain regions. Altered connectivity plays an important role in the pathology of autism spectrum disorder (ASD), a severe neurodevelopmental disorder. ASD is associated with abnormal brain development and structurally altered interhemispheric connections. Cortico-cortical connectivity can be studied by a combination of transcranial magnetic stimulation (TMS) with concurrent EEG (TMS-EEG)...
August 2016: Journal of Neural Transmission
https://www.readbyqxmd.com/read/27155161/timing-of-emotion-representation-in-right-and-left-occipital-region-evidence-from-combined-tms-eeg
#19
Giulia Mattavelli, Mario Rosanova, Adenauer G Casali, Costanza Papagno, Leonor J Romero Lauro
Neuroimaging and electrophysiological studies provide evidence of hemispheric differences in processing faces and, in particular, emotional expressions. However, the timing of emotion representation in the right and left hemisphere is still unclear. Transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) was used to explore cortical responsiveness during behavioural tasks requiring processing of either identity or expression of faces. Single-pulse TMS was delivered 100ms after face onset over the medial prefrontal cortex (mPFC) while continuous EEG was recorded using a 60-channel TMS-compatible amplifier; right premotor cortex (rPMC) was also stimulated as control site...
July 2016: Brain and Cognition
https://www.readbyqxmd.com/read/26981889/indicators-for-remission-of-suicidal-ideation-following-magnetic-seizure-therapy-in-patients-with-treatment-resistant-depression
#20
Yinming Sun, Faranak Farzan, Benoit H Mulsant, Tarek K Rajji, Paul B Fitzgerald, Mera S Barr, Jonathan Downar, Willy Wong, Daniel M Blumberger, Zafiris J Daskalakis
IMPORTANCE: Magnetic seizure therapy (MST) is a novel therapeutic option for treatment-resistant depression (TRD). Suicidal ideation is often associated with TRD and contributes to the increased mortality and morbidity of the disorder. OBJECTIVE: To identify a biomarker that may serve as an indicator of remission of suicidal ideation following a course of MST by using cortical inhibition measures from interleaved transcranial magnetic stimulation and electroencephalography (TMS-EEG)...
April 2016: JAMA Psychiatry
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