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Theta burst stimulation

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https://www.readbyqxmd.com/read/28303385/after-effects-of-cerebellar-continuous-theta-burst-stimulation-on-reflexive-saccades-and-smooth-pursuit-in-humans
#1
Silvia Colnaghi, P Colagiorgio, S Ramat, E D'Angelo, G Koch, M Versino
The use of cerebellar repetitive transcranial magnetic stimulation has been attempted for perturbing reflexive and voluntary eye movements, but discrepancies are seen between the results of distinct studies possibly due to the different stimulation sites, intensities, and paradigms. We describe the after effects of 20 and 40 s continuous Theta Burst Stimulation (cTBS) as compared to sham stimulation, applied over the lateral cerebellar vermis and paravermis on Reflexive Saccades (RS) and Smooth Pursuit (SP) eye movements, recorded in the 30 min following stimulation...
March 16, 2017: Cerebellum
https://www.readbyqxmd.com/read/28293801/theta-burst-stimulation-of-the-precuneus-modulates-resting-state-connectivity-in-the-left-temporal-pole
#2
Matteo Mancini, Chiara Mastropasqua, Sonia Bonnì, Viviana Ponzo, Mara Cercignani, Silvia Conforto, Giacomo Koch, Marco Bozzali
It has been shown that continuous theta burst stimulation (cTBS) over the precuneus acts on specific memory retrieval abilities. In order to study the neural mechanisms beyond these findings, we combined cTBS and resting-state functional magnetic resonance imaging. Our experimental protocol involved stimulation and sham conditions on a group of healthy subjects, and each condition included a baseline and two follow-up acquisitions (5 and 15 min after baseline) after cTBS. We analysed brain functional connectivity by means of graph theoretical measures, with a specific focus on the network modular structure...
March 14, 2017: Brain Topography
https://www.readbyqxmd.com/read/28283370/reduced-multimodal-integration-of-memory-features-following-continuous-theta-burst-stimulation-of-angular-gyrus
#3
Yasemin Yazar, Zara M Bergström, Jon S Simons
BACKGROUND: Lesions of the angular gyrus (AnG) region of human parietal cortex do not cause amnesia, but appear to be associated with reduction in the ability to consciously experience the reliving of previous events. OBJECTIVES/HYPOTHESIS: We used continuous theta burst stimulation to test the hypothesis that the cognitive mechanism implicated in this memory deficit might be the integration of retrieved sensory event features into a coherent multimodal memory representation...
March 1, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28268353/continuous-theta-burst-transcranial-magnetic-stimulation-affects-brain-functional-connectivity
#4
Dan Cao, Yingjie Li, Ling Wei, Yingying Tang
Prefrontal cortex (PFC) plays an important role in the emotional processing as well as in the functional brain network. Hyperactivity in the right dorsolateral prefrontal cortex (DLPFC) would be found in anxious participants. However, it is still unclear what the role of PFC played in a resting functional network. Continuous theta burst transcranial magnetic stimulation (cTBS) is an effective tool to create virtual lesions on brain regions. In this paper, we applied cTBS over right prefrontal area, and investigated the effects of cTBS on the brain activity for functional connectivity by the method of graph theory...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28254709/efficacy-of-theta-burst-stimulation-tbs-for-major-depression-an-exploratory-meta-analysis-of-randomized-and-sham-controlled-trials
#5
Marcelo T Berlim, Alexander McGirr, Nicole Rodrigues Dos Santos, Sara Tremblay, Ruben Martins
Theta burst stimulation (TBS) has been proposed as a novel treatment for major depression (MD). However, randomized and sham-controlled trials (RCTs) published to date have yielded heterogeneous clinical results and we have thus carried out the present systematic review and exploratory meta-analysis of RCTs to evaluate this issue. We searched the literature for RCTs on TBS for MD from January 2001 through September 2016 using MEDLINE, EMBASE, PsycINFO, and CENTRAL. We then performed a random-effects meta-analysis with the main outcome measures including pre-post score changes in the Hamilton Depression Rating Scale (HAM-D) as well as rates of response, remission and dropout...
February 21, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28254507/primary-somatosensory-cortex-necessary-for-the-perception-of-weight-from-other-people-s-action-a-continuous-theta-burst-tms-experiment
#6
Nikola Valchev, Emmanuele Tidoni, Antonia F de C Hamilton, Valeria Gazzola, Alessio Avenanti
The presence of a network of areas in the parietal and premotor cortices, which are active both during action execution and observation, suggests that we might understand the actions of other people by activating those motor programs for making similar actions. Although neurophysiological and imaging studies show an involvement of the somatosensory cortex (SI) during action observation and execution, it is unclear whether SI is essential for understanding the somatosensory aspects of observed actions. To address this issue, we used off-line transcranial magnetic continuous theta-burst stimulation (cTBS) just before a weight judgment task...
February 28, 2017: NeuroImage
https://www.readbyqxmd.com/read/28246967/the-cognitive-role-of-the-globus-pallidus-interna-insights-from-disease-states
#7
M J Gillies, J A Hyam, A R Weiss, C A Antoniades, R Bogacz, J J Fitzgerald, T Z Aziz, M A Whittington, Alexander L Green
The motor symptoms of both Parkinson's disease and focal dystonia arise from dysfunction of the basal ganglia, and are improved by pallidotomy or deep brain stimulation of the Globus Pallidus interna (GPi). However, Parkinson's disease is associated with a greater degree of basal ganglia-dependent learning impairment than dystonia. We attempt to understand this observation in terms of a comparison of the electrophysiology of the output of the basal ganglia between the two conditions. We use the natural experiment offered by Deep Brain Stimulation to compare GPi local field potential responses in subjects with Parkinson's disease compared to subjects with dystonia performing a forced-choice decision-making task with sensory feedback...
February 28, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28230741/high-frequency-repetitive-transcranial-magnetic-stimulation-rtms-improves-functional-recovery-by-enhancing-neurogenesis-and-activating-bdnf-trkb-signaling-in-ischemic-rats
#8
Jing Luo, Haiqing Zheng, Liying Zhang, Qingjie Zhang, Lili Li, Zhong Pei, Xiquan Hu
Repetitive transcranial magnetic stimulation (rTMS) has rapidly become an attractive therapeutic approach for stroke. However, the mechanisms underlying this remain elusive. This study aimed to investigate whether high-frequency rTMS improves functional recovery mediated by enhanced neurogenesis and activation of brain-derived neurotrophic factor (BDNF)/tropomyosin-related kinase B (TrkB) pathway and to compare the effect of conventional 20 Hz rTMS and intermittent theta burst stimulation (iTBS) on ischemic rats...
February 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28226516/continuous-theta-burst-transcranial-magnetic-stimulation-affects-brain-functional-connectivity
#9
Dan Cao, Yingjie Li, Ling Wei, Yingying Tang, Dan Cao, Yingjie Li, Ling Wei, Yingying Tang, Yingying Tang, Yingjie Li, Ling Wei, Dan Cao
Prefrontal cortex (PFC) plays an important role in the emotional processing as well as in the functional brain network. Hyperactivity in the right dorsolateral prefrontal cortex (DLPFC) would be found in anxious participants. However, it is still unclear what the role of PFC played in a resting functional network. Continuous theta burst transcranial magnetic stimulation (cTBS) is an effective tool to create virtual lesions on brain regions. In this paper, we applied cTBS over right prefrontal area, and investigated the effects of cTBS on the brain activity for functional connectivity by the method of graph theory...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28216033/safety-of-transcranial-magnetic-stimulation-in-children-a-systematic-review-of-the-literature
#10
REVIEW
Corey H Allen, Benzi M Kluger, Isabelle Buard
BACKGROUND: Data and best practice recommendations for transcranial magnetic stimulation (TMS) use in adults are largely available. Although there are fewer data in pediatric populations and no published guidelines, its practice in children continues to grow. METHODS: We performed a literature search through PubMed to review all TMS studies from 1985 to 2016 involving children and documented any adverse events. Crude risks were calculated per session. RESULTS: Following data screening we identified 42 single-pulse and/or paired-pulse TMS studies involving 639 healthy children, 482 children with central nervous system disorders, and 84 children with epilepsy...
March 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28202907/calpain-1-deletion-impairs-mglur-dependent-ltd-and-fear-memory-extinction
#11
Guoqi Zhu, Victor Briz, Jeff Seinfeld, Yan Liu, Xiaoning Bi, Michel Baudry
Recent studies indicate that calpain-1 is required for the induction of long-term potentiation (LTP) elicited by theta-burst stimulation in field CA1 of hippocampus. Here we determined the contribution of calpain-1 in another type of synaptic plasticity, the long-term depression (LTD) elicited by activation of type-I metabotropic glutamate receptors (mGluR-LTD). mGluR-LTD was associated with calpain-1 activation following T-type calcium channel opening, and resulted in the truncation of a regulatory subunit of PP2A, B56α...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28192502/theta-burst-transcranial-magnetic-stimulation-to-the-prefrontal-or-parietal-cortex-does-not-impair-metacognitive-visual-awareness
#12
Daniel Bor, David J Schwartzman, Adam B Barrett, Anil K Seth
Neuroimaging studies commonly associate dorsolateral prefrontal cortex (DLPFC) and posterior parietal cortex with conscious perception. However, such studies only investigate correlation, rather than causation. In addition, many studies conflate objective performance with subjective awareness. In an influential recent paper, Rounis and colleagues addressed these issues by showing that continuous theta burst transcranial magnetic stimulation (cTBS) applied to the DLPFC impaired metacognitive (subjective) awareness for a perceptual task, while objective performance was kept constant...
2017: PloS One
https://www.readbyqxmd.com/read/28186666/impaired-intracortical-transmission-in-g2019s-leucine-rich-repeat-kinase-parkinson-patients
#13
Viviana Ponzo, Francesco Di Lorenzo, Livia Brusa, Tommaso Schirinzi, Stefania Battistini, Claudia Ricci, Manolo Sambucci, Carlo Caltagirone, Giacomo Koch
OBJECTIVES: A mutation in leucine-rich repeat kinase 2 is the most common cause of hereditary Parkinson's disease (PD), yet the neural mechanisms and the circuitry potentially involved are poorly understood. METHODS: We used different transcranial magnetic stimulation protocols to explore in the primary motor cortex the activity of intracortical circuits and cortical plasticity (long-term potentiation) in patients with the G2019S leucine-rich repeat kinase 2 gene mutation when compared with idiopathic PD patients and age-matched healthy subjects...
February 10, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28180015/effects-of-intermittent-theta-burst-stimulation-on-manual-dexterity-and-motor-imagery-in-patients-with-multiple-sclerosis-a-quasi-experimental-controlled-study
#14
Mahdieh Azin, Nasser Zangiabadi, Farhad Iranmanesh, Mohammad Reza Baneshi, Seyedshahab Banihashem
BACKGROUND: Intermittent theta burst stimulation (iTBS) is a repetitive transcranial magnetic stimulation (rTMS) protocol that influences cortical excitability and motor function recovery. OBJECTIVES: This study aimed to investigate the effects of iTBS on manual dexterity and hand motor imagery in multiple sclerosis (MS) patients. METHODS: Thirty-six MS patients were non-randomly assigned into sham (control) or iTBS groups. Then, iTBS was delivered to the primary motor cortex for ten days over two consecutive weeks...
October 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28179165/selective-tms-induced-modulation-of-functional-connectivity-correlates-with-changes-in-behavior
#15
Puiu F Balan, Annelies Gerits, Dante Mantini, Wim Vanduffel
Despite the increasing use of functional connectivity (FC) studies in fundamental and clinical research, the link between FC and behavior is still poorly understood. To test the hypothesis that artificial modulation of FC correlates with changes in behavior in a quantitative manner, we performed behavioral and resting state fMRI experiments in monkeys while perturbing, offline, the frontal eye fields (FEF) using unilateral continuous theta burst transcranial magnetic stimulation (FEF-cTBS). Stimulation of left and right FEF caused remarkably specific decreases in FC, which were symmetric for intra-hemispheric and asymmetric for inter-hemispheric FC...
February 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28144218/changes-in-cortical-plasticity-in-relation-to-a-history-of-concussion-during-adolescence
#16
Sean K Meehan, Jasmine L Mirdamadi, Douglas N Martini, Steven P Broglio
Adolescence and early adulthood is a critical period for neurophysiological development potentially characterized by an increased susceptibility to the long-term effects of traumatic brain injury. The current study investigated differences in motor cortical physiology and neuroplastic potential across a cohort of young adults with adolescent concussion history and those without. Transcranial magnetic stimulation (TMS) was used to assess motor evoked potential (MEP) amplitude, short-interval cortical inhibition (SICI) and intracortical facilitation (ICF) before and after intermittent theta burst stimulation (iTBS)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28142027/the-right-angular-gyrus-controls-spontaneous-eyeblink-rate-a-combined-structural-mri-and-tms-study
#17
Tamami Nakano
Spontaneous eyeblink rates vary greatly between people, from several to a few dozen blinks per minute. Nevertheless, it remains unknown which brain region controls generation of spontaneous eyeblinks. To investigate this issue, the present study examined brain anatomy, which reflects inter-individual variability in eyeblink rate using structural magnetic resonance images with voxel-based morphometry (VBM) in 57 participants. The gray matter volume of the right angular gyrus (rAG) was positively associated with an increased eyeblink rate...
March 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28130194/dynamic-aftereffects-in-supplementary-motor-network-following-inhibitory-transcranial-magnetic-stimulation-protocols
#18
Gong-Jun Ji, Fengqiong Yu, Wei Liao, Kai Wang
The supplementary motor area (SMA) is a key node of the motor network. Inhibitory repetitive transcranial magnetic stimulation (rTMS) of the SMA can potentially improve movement disorders. However, the aftereffects of inhibitory rTMS on brain function remain largely unknown. Using a single-blind, crossover within-subject design, we investigated the role of aftereffects with two inhibitory rTMS protocols [1800 pulses of either 1-Hz repetitive stimulation or continuous theta burst stimulation (cTBS)] on the left SMA...
January 24, 2017: NeuroImage
https://www.readbyqxmd.com/read/28129054/interindividual-variability-and-intraindividual-reliability-of-intermittent-theta-burst-stimulation-induced-neuroplasticity-mechanisms-in-the-healthy-brain
#19
Lukas Schilberg, Teresa Schuhmann, Alexander T Sack
We combined patterned TMS with EMG in several sessions of a within-subject design to assess and characterize intraindividual reliability and interindividual variability of TMS-induced neuroplasticity mechanisms in the healthy brain. Intermittent theta burst stimulation (iTBS) was applied over M1 to induce long-term potentiation-like mechanisms as assessed by changes in corticospinal excitability. Furthermore, we investigated the association between the observed iTBS effects and individual differences in prolonged measures of corticospinal excitability...
January 27, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28107807/continuous-theta-burst-stimulation-may-improve-visuospatial-neglect-via-modulating-the-attention-network-a-randomized-controlled-study
#20
Wei Fu, Lei Cao, Yanming Zhang, Su Huo, JuBao Du, Lin Zhu, Weiqun Song
BACKGROUND: Visuospatial neglect (VSN) is devastating and common after stroke, and is thought to involve functional disturbance of the attention network. Non-invasive theta-burst stimulation (TBS) may help restore the normal function of attention network, therefore facilitating recovery from VSN. OBJECTIVE: This study investigated the effects of continuous TBS on resting-state functional connectivity (RSFC) in the attention network, and behavioral performances of patients with VSN after stroke...
January 20, 2017: Topics in Stroke Rehabilitation
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