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Theta burst stimulation

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https://www.readbyqxmd.com/read/28624346/theta-burst-magnetic-stimulation-over-the-pre-supplementary-motor-area-improves-motor-inhibition
#1
Ignacio Obeso, Leonora Wilkinson, James T Teo, Penelope Talelli, John C Rothwell, Marjan Jahanshahi
BACKGROUND: Stopping an ongoing motor response or resolving conflict induced by conflicting stimuli are associated with activation of a right-lateralized network of inferior frontal gyrus (IFG), pre-supplementary motor area (pre-SMA) and subthalamic nucleus (STN). However, the roles of the right IFG and pre-SMA in stopping a movement and in conflict resolution remain unclear. We used continuous theta burst stimulation (cTBS) to examine the involvement of the right IFG and pre-SMA in inhibition and conflict resolution using the conditional stop signal task...
May 22, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28598858/effects-of-intermittent-theta-burst-stimulation-on-spasticity-after-spinal-cord-injury
#2
Raffaele Nardone, Patrick B Langthaler, Andrea Orioli, Peter Höller, Yvonne Höller, Vanessa N Frey, Francesco Brigo, Eugen Trinka
PURPOSE: Spasticity is a common disorder in patients with spinal cord injury (SCI). The aim of this study was to investigate whether intermittent theta burst stimulation (iTBS), a safe, non-invasive and well-tolerated protocol of excitatory repetitive transcranial magnetic stimulation (rTMS), is effective in modulating spasticity in SCI patients. METHODS: In this randomized, double-blind, crossover, sham-controlled study, ten subjects with incomplete cervical or thoracic SCI received 10 days of daily sessions of real or sham iTBS...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28577381/neurotoxicity-of-low-bisphenol-a-bpa-exposure-for-young-male-mice-implications-for-children-exposed-to-environmental-levels-of-bpa
#3
Yuanxiu Zhou, Zhouyu Wang, Minghan Xia, Siyi Zhuang, Xiaobing Gong, Jianwen Pan, Chuhua Li, Ruifang Fan, Qihua Pang, Shaoyou Lu
To investigate the neuron toxicities of low-dose exposure to bisphenol A (BPA) in children, mice were used as an animal model. We examined brain cell damage and the effects of learning and memory ability after BPA exposure in male mice (4 weeks of age) that were divided into four groups and chronically received different BPA treatments for 8 weeks. The comet assay and hippocampal neuron counting were used to detect the brain cell damage. The Y-maze test was applied to test alterations in learning and memory ability...
May 31, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28576566/continuous-theta-burst-stimulation-facilitates-the-clearance-efficiency-of-the-glymphatic-pathway-in-a-mouse-model-of-sleep-deprivation
#4
Dong-Xu Liu, Xia He, Dan Wu, Qun Zhang, Chao Yang, Feng-Yin Liang, Xiao-Fei He, Guang-Yan Dai, Zhong Pei, Yue Lan, Guang-Qing Xu
Sleep deprivation (SD) is a common condition associated with a variety of nervous system diseases, and has a negative impact on emotional and cognitive function. Continuous theta burst stimulation (cTBS) is known to improve cognition and emotion function in normal situations as well as in various types of dysfunction, but the mechanism remains unknown. We used two-photon in vivo imaging to explore the effect of cTBS on glymphatic pathway clearance in normal and SD C57BL/6J mice. Aquaporin-4 (AQP4) polarization was detected by immunofluorescence...
May 30, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28536500/the-impact-of-single-session-intermittent-theta-burst-stimulation-over-the-dorsolateral-prefrontal-cortex-and-posterior-superior-temporal-sulcus-on-adults-with-autism-spectrum-disorder
#5
Hsing-Chang Ni, June Hung, Chen-Te Wu, Yu-Yu Wu, Chee-Jen Chang, Rou-Shayn Chen, Ying-Zu Huang
Intermittent theta burst stimulation (iTBS), a patterned repetitive transcranial magnetic stimulation, was applied over the posterior superior temporal sulcus (pSTS) or dorsolateral prefrontal cortex (DLPFC) to explore its impact in adults with autism spectrum disorder (ASD). Among 25 adults with ASD, 19 (mean age: 20.8 years) completed the randomized, sham-controlled, crossover trial. Every participant received iTBS over the bilateral DLPFC, bilateral pSTS and inion (as a sham control stimulation) in a randomized order with a 1-week interval...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28528965/probing-the-timing-network-a-continuous-theta-burst-stimulation-study-of-temporal-categorization
#6
Juan Carlos Méndez, Lorenzo Rocchi, Marjan Jahanshahi, John Rothwell, Hugo Merchant
Time perception in the millisecond and second ranges is thought to be processed by different neural mechanisms. However, whether there is a sharp boundary between these ranges and whether they are implemented in the same, overlapped or separate brain areas is still not certain. To probe the role of the right dorsolateral prefrontal cortex (dlPFC), the right supplementary motor area (SMA), and the cerebellum on time perception, we temporarily altered their activity on healthy volunteers on separate sessions using transcranial magnetic stimulation with the continuous Theta Burst Stimulation (cTBS) protocol...
May 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28511124/demonstration-of-short-term-plasticity-in-the-dorsolateral-prefrontal-cortex-with-theta-burst-stimulation-a-tms-eeg-study
#7
Sung Wook Chung, Benjamin P Lewis, Nigel C Rogasch, Takashi Saeki, Richard H Thomson, Kate E Hoy, Neil W Bailey, Paul B Fitzgerald
OBJECTIVES: To examine the effects of intermittent TBS (iTBS) and continuous TBS (cTBS) on cortical reactivity in the dorsolateral prefrontal cortex. METHODS: 10 healthy participants were stimulated with either iTBS, cTBS or sham at F3 electrode. Single- and paired-pulse TMS and concurrent electroencephalography (EEG) were used to assess change in cortical reactivity and long-interval intracortical inhibition (LICI) via TMS-evoked potentials (TEPs) and TMS-evoked oscillations...
July 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28505211/fronto-temporal-interactions-are-functionally-relevant-for-semantic-control-in-language-processing
#8
Max Wawrzyniak, Felix Hoffstaedter, Julian Klingbeil, Anika Stockert, Katrin Wrede, Gesa Hartwigsen, Simon B Eickhoff, Joseph Classen, Dorothee Saur
Semantic cognition, i.e. processing of meaning is based on semantic representations and their controlled retrieval. Semantic control has been shown to be implemented in a network that consists of left inferior frontal (IFG), and anterior and posterior middle temporal gyri (a/pMTG). We aimed to disrupt semantic control processes with continuous theta burst stimulation (cTBS) over left IFG and pMTG and to study whether behavioral effects are moderated by induced alterations in resting-state functional connectivity...
2017: PloS One
https://www.readbyqxmd.com/read/28501325/a-role-for-nmdar-dependent-cerebellar-plasticity-in-adaptive-control-of-saccades-in-humans
#9
S Colnaghi, P Colagiorgio, M Versino, G Koch, E D'Angelo, S Ramat
BACKGROUND: Saccade pulse amplitude adaptation is mediated by the dorsal cerebellar vermis and fastigial nucleus. Long-term depression at the parallel fibre-Purkinjie cell synapses has been suggested to provide a cellular mechanism for the corresponding learning process. The mechanisms and sites of this plasticity, however, are still debated. OBJECTIVE: To test the role of cerebellar plasticity phenomena on adaptive saccade control. METHODS: We evaluated the effect of continuous theta burst stimulation (cTBS) over the posterior vermis on saccade amplitude adaptation and spontaneous recovery of the initial response...
July 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28495634/network-targeted-cerebellar-transcranial-magnetic-stimulation-improves-attentional-control
#10
Michael Esterman, Michelle Thai, Hidefusa Okabe, Joseph DeGutis, Elyana Saad, Simon E Laganiere, Mark A Halko
Developing non-invasive brain stimulation interventions to improve attentional control is extremely relevant to a variety of neurological and psychiatric populations, yet few studies have identified reliable biomarkers that can be readily modified to improve attentional control. One potential biomarker of attention is functional connectivity in the core cortical network supporting attention - the dorsal attention network (DAN). We used a network-targeted cerebellar transcranial magnetic stimulation (TMS) procedure, intended to enhance cortical functional connectivity in the DAN...
May 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/28485406/inducing-a-long-term-potentiation-in-the-dentate-gyrus-is-sufficient-to-produce-rapid-antidepressant-like-effects
#11
A Kanzari, C Bourcier-Lucas, A Freyssin, D N Abrous, N Haddjeri, G Lucas
Recent hypotheses propose that one prerequisite to obtain a rapid antidepressant (AD) effect would reside in processes of synaptic reinforcement occurring within the dentate gyrus (DG) of the hippocampus independently from neurogenesis. However, to date no relationship has been established between an increased DG synaptic plasticity, and rapid AD-like action. To the best of our knowledge, this study shows for the first time that inducing a long-term potentiation (LTP) within the DG by stimulating the perforant pathway (PP) is sufficient to induce such effects...
May 9, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28449351/long-term-plasticity-of-corticostriatal-synapses-is-modulated-by-pathway-specific-co-release-of-opioids-through-kappa-opioid-receptors
#12
Sarah L Hawes, Armando G Salinas, David M Lovinger, Kim T Blackwell
Synaptic plasticity in striatum adjusts behaviour adaptively during skill learning, or maladaptively in the case of addiction. Just as dopamine plays a critical role in synaptic plasticity underlying normal skill learning and addiction, endogenous and exogenous opiates also modulate learning and addiction-related striatal plasticity. Though the role of opioid receptors in long-term depression in striatum has been characterized, their effect on long-term potentiation (LTP) remains unknown. In particular, direct pathway (Dopamine D1 Receptor containing; D1R) - spiny projection neurons (SPNs) co-release the opioid neuropeptide dynorphin, which acts at presynaptic kappa opioid receptors (KORs) on dopaminergic afferents and can negatively regulate dopamine release...
April 27, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28435045/current-direction-dependent-modulation-of-human-hand-motor-function-by-intermittent-theta-burst-stimulation-itbs
#13
Yuichiro Shirota, Suman Dhaka, Walter Paulus, Martin Sommer
BACKGROUND: Transcranial magnetic stimulation (TMS) with different current directions can activate different sets of neurons. Current direction can also affect the results of repetitive TMS. OBJECTIVE: To test the influence of uni-directional intermittent theta burst stimulation (iTBS) using different current directions, namely posteroanterior (PA) and anteroposterior (AP), on motor behaviour. METHODS: In a cross-over design, PA- and AP-iTBS was applied over the left primary motor cortex in 19 healthy, right-handed volunteers...
April 21, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28428769/individualized-repetitive-transcranial-magnetic-stimulation-treatment-in-chronic-tinnitus
#14
Peter M Kreuzer, Timm B Poeppl, Rainer Rupprecht, Veronika Vielsmeier, Astrid Lehner, Berthold Langguth, Martin Schecklmann
BACKGROUND: Prefrontal and temporo-parietal repetitive transcranial magnetic stimulation (rTMS) in patients suffering from chronic tinnitus have shown significant but only moderate effectiveness with high interindividual variability in treatment response. This open-label pilot study was designed to examine the general feasibility of an individualized fronto-temporal rTMS protocol and to explore what criteria are needed for a more detailed evaluation in randomized clinical studies. METHODS: During the first session of a 2-week rTMS protocol, we applied different rTMS protocols to the left and right temporo-parietal and dorsolateral prefrontal cortex (DLPFC) in 25 tinnitus patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28404455/modulation-of-itbs-after-effects-via-concurrent-directional-tdcs-a-proof-of-principle-study
#15
Sara Tremblay, Ricci Hannah, Vishal Rawji, John C Rothwell
BACKGROUND: Polarising currents can modulate membrane potentials in animals, affecting the after-effect of theta burst stimulation (TBS) on synaptic strength. OBJECTIVE: We examined whether a similar phenomenon could also be observed in human motor cortex (M1) using transcranial direct current stimulation (TDCS) during monophasic intermittent TBS (iTBS). METHODS: TDCS was applied during posterior-anterior iTBS using three different conditions: posterior-anterior TDCS (anode 3...
July 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28394013/intermittent-theta-burst-stimulation-rescues-dopamine-dependent-corticostriatal-synaptic-plasticity-and-motor-behavior-in-experimental-parkinsonism-possible-role-of-glial-activity
#16
Fabrizio Cacace, Desirèe Mineo, Maria Teresa Viscomi, Emanuele Claudio Latagliata, Maria Mancini, Valeria Sasso, Anna Vannelli, Tiziana Pascucci, Valentina Pendolino, Elena Marcello, Silvia Pelucchi, Stefano Puglisi-Allegra, Marco Molinari, Barbara Picconi, Paolo Calabresi, Veronica Ghiglieri
BACKGROUND: Recent studies support the therapeutic utility of repetitive transcranial magnetic stimulation in Parkinson's disease (PD), whose progression is correlated with loss of corticostriatal long-term potentiation and long-term depression. Glial cell activation is also a feature of PD that is gaining increasing attention in the field because astrocytes play a role in chronic neuroinflammatory responses but are also able to manage dopamine (DA) levels. METHODS: Intermittent theta-burst stimulation protocol was applied to study the effect of therapeutic neuromodulation on striatal DA levels measured by means of in vivo microdialysis in 6-hydroxydopamine-hemilesioned rats...
April 10, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28391033/offline-continuous-theta-burst-stimulation-over-right-inferior-frontal-gyrus-and-pre-supplementary-motor-area-impairs-inhibition-during-a-go-no-go-task
#17
Neil M Drummond, Erin K Cressman, Anthony N Carlsen
In a typical go/no-go task a single imperative stimulus is presented each trial, either a go or no-go stimulus. Participants are instructed to initiate a known response upon appearance of the go-signal and withhold the response if the no-go signal is presented. It is unclear whether the go-response is prepared in advance of the imperative stimulus in a go/no-go task. Moreover, it is unclear if inhibitory control processes suppress preparatory go-activation. The purpose of the present experiment was 1) to determine whether the go-response is prepared in advance of stimulus identification with the use of a startling acoustic stimulus (SAS), and 2) investigate the inhibitory role of the right inferior frontal gyrus (rIFG) and pre-supplementary motor area (preSMA) during the performance of a go/no-go task with the use of continuous theta burst stimulation (cTBS)...
April 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28387589/inhibition-of-pre-supplementary-motor-area-by-continuous-theta-burst-stimulation-leads-to-more-cautious-decision-making-and-more-efficient-sensory-evidence-integration
#18
Tuğçe Tosun, Dilara Berkay, Alexander T Sack, Yusuf Ö Çakmak, Fuat Balcı
Decisions are made based on the integration of available evidence. The noise in evidence accumulation leads to a particular speed-accuracy tradeoff in decision-making, which can be modulated and optimized by adaptive decision threshold setting. Given the effect of pre-SMA activity on striatal excitability, we hypothesized that the inhibition of pre-SMA would lead to higher decision thresholds and an increased accuracy bias. We used offline continuous theta burst stimulation to assess the effect of transient inhibition of the right pre-SMA on the decision processes in a free-response two-alternative forced-choice task within the drift diffusion model framework...
April 7, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28382420/cerebellar-theta-burst-stimulation-does-not-improve-freezing-of-gait-in-patients-with-parkinson-s-disease
#19
Arno M Janssen, Moniek A M Munneke, Jorik Nonnekes, Thomas van der Kraan, Alice Nieuwboer, Ivan Toni, Anke H Snijders, Bastiaan R Bloem, Dick F Stegeman
Freezing of gait (FOG) in Parkinson's disease (PD) likely results from dysfunction within a complex neural gait circuitry involving multiple brain regions. Herein, cerebellar activity is increased in patients compared to healthy subjects. This cerebellar involvement has been proposed to be compensatory. We hypothesized that patients with FOG would have a reduced ability to recruit the cerebellum to compensate for dysfunction in other brain areas. In this study cerebellar activity was modified unilaterally by either excitatory or inhibitory theta burst stimulation (TBS), applied during two separate sessions...
May 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28373927/non-invasive-brain-stimulation-for-essential-tremor
#20
REVIEW
Ludy C Shih, Alvaro Pascual-Leone
BACKGROUND: There is increasing interest in the use of non-invasive brain stimulation to characterize and potentially treat essential tremor (ET). Studies have used a variety of stimulation coils, paradigms, and target locations to make these observations. We reviewed the literature to compare prior studies and to evaluate the rationale and the methods used in these studies. METHODS: We performed a systematic literature search of the PubMed database using the terms "transcranial," "noninvasive," "brain stimulation," "transcranial magnetic stimulation (TMS)," "transcranial direct current stimulation (tDCS)," "transcranial alternating current stimulation (tACS)," and "essential tremor...
2017: Tremor and Other Hyperkinetic Movements
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