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Theta burst stimulation

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https://www.readbyqxmd.com/read/27916756/-repetitive-transcranial-magnetic-stimulation-rtms-for-higher-brain-function-deficits
#1
Yukichi Inoue
The management of higher brain dysfunctions such as stroke-induced unilateral spatial neglect (USN) or aphasia is crucial because these dysfunctions have devastating neurological repercussions on the patients' daily life and quality of life. Impairment of the physiological interhemispheric rivalry is often the result of brain insults such as strokes or traumatic injuries, and it may lead to USN or aphasia. Repetitive transcranial magnetic stimulation (rTMS), a non-invasive brain stimulation method, is a promising tool for restoring the pathological imbalance in interhemispheric rivalry by either suppressing the hyperactivity of the unaffected hemisphere or facilitating hypoactivity in the affected hemisphere...
December 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27902711/eeg-to-primary-rewards-predictive-utility-and-malleability-by-brain-stimulation
#2
Nicole Prause, Greg J Siegle, Choi Deblieck, Allan Wu, Marco Iacoboni
Theta burst stimulation (TBS) is thought to affect reward processing mechanisms, which may increase and decrease reward sensitivity. To test the ability of TBS to modulate response to strong primary rewards, participants hypersensitive to primary rewards were recruited. Twenty men and women with at least two opposite-sex, sexual partners in the last year received two forms of TBS. Stimulations were randomized to avoid order effects and separated by 2 hours to reduce carryover. The two TBS forms have been demonstrated to inhibit (continuous) or excite (intermittent) the left dorsolateral prefrontal cortex using different pulse patterns, which links to brain areas associated with reward conditioning...
2016: PloS One
https://www.readbyqxmd.com/read/27900437/bdnf-and-ltp-ltd-like-plasticity-of-the-primary-motor-cortex-in-gilles-de-la-tourette-syndrome
#3
L Marsili, A Suppa, F Di Stasio, D Belvisi, N Upadhyay, I Berardelli, M Pasquini, S Petrucci, M Ginevrino, G Fabbrini, F Cardona, G Defazio, A Berardelli
Gilles de la Tourette syndrome (GTS) is characterized by motor and vocal tics and often associated with obsessive-compulsive disorder (OCD). Responses to intermittent/continuous theta-burst stimulation (iTBS/cTBS), which probe long-term potentiation (LTP)-/depression (LTD)-like plasticity in the primary motor cortex (M1), are reduced in GTS. ITBS-/cTBS-induced M1 plasticity can be affected by brain-derived neurotrophic factor (BDNF) polymorphism. We investigated whether the BDNF polymorphism influences iTBS-/cTBS-induced LTP-/LTD-like M1 plasticity in 50 GTS patients and in 50 age- and sex-matched healthy subjects...
November 30, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27888026/temporary-removal-priming-theta-burst-stimulation-enhances-motor-cortex-plasticity-in-young-but-not-old-adults
#4
George M Opie, Eleni Vosnakis, Michael C Ridding, Ulf Ziemann, John G Semmler
No abstract text is available yet for this article.
November 17, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27886079/cerebellar-intermittent-theta-burst-stimulation-and-motor-control-training-in-individuals-with-cervical-dystonia
#5
Lynley V Bradnam, Michelle N McDonnell, Michael C Ridding
BACKGROUND: There is emerging evidence that cervical dystonia is a neural network disorder with the cerebellum as a key node. The cerebellum may provide a target for neuromodulation as a therapeutic intervention in cervical dystonia. OBJECTIVE: This study aimed to assess effects of intermittent theta-burst stimulation of the cerebellum on dystonia symptoms, quality of life, hand motor dexterity and cortical neurophysiology using transcranial magnetic stimulation...
November 23, 2016: Brain Sciences
https://www.readbyqxmd.com/read/27872582/separate-ionotropic-and-metabotropic-glutamate-receptor-functions-in-depotentiation-vs-ltp-a-distinct-role-for-group1-mglur-subtypes-and-nmdars
#6
Amira Latif-Hernandez, Enrico Faldini, Tariq Ahmed, Detlef Balschun
Depotentiation (DP) is a mechanism by which synapses that have recently undergone long-term potentiation (LTP) can reverse their synaptic strengthening within a short time-window after LTP induction. Group 1 metabotropic glutamate receptors (mGluRs) were shown to be involved in different forms of LTP and long-term depression (LTD), but little is known about their roles in DP. Here, we generated DP by applying low-frequency stimulation (LFS) at 5 Hz after LTP had been induced by a single train of theta-burst-stimulation (TBS)...
2016: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/27852961/effect-of-antipsychotic-pharmacotherapy-on-clinical-outcomes-of-intermittent-theta-burst-stimulation-for-refractory-depression
#7
Laura Schulze, Gary Remington, Peter Giacobbe, Sidney H Kennedy, Daniel M Blumberger, Zafiris J Daskalakis, Jonathan Downar
Theta-burst stimulation is an emerging protocol for repetitive transcranial magnetic stimulation that takes 1-3 min to administer, yet offers equal/superior potency to conventional protocols lasting 30-60 min. However, preclinical evidence suggests that D2 receptor blockade may abolish the acute effects of theta-burst stimulation on synaptic facilitation or inhibition. As many patients presenting for repetitive transcranial magnetic stimulation are taking antipsychotic medications as augmentation for treatment-resistant depression, this finding is potentially concerning for the implementation of theta-burst stimulation in clinical settings...
November 9, 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27807163/long-term-potentiation-at-the-mossy-fiber-granule-cell-relay-invokes-postsynaptic-second-messenger-regulation-of-kv4-channels
#8
Arsalan P Rizwan, Xiaoqin Zhan, Gerald W Zamponi, Ray W Turner
: Mossy fiber afferents to cerebellar granule cells form the primary synaptic relay into cerebellum, providing an ideal site to process signal inputs differentially. Mossy fiber input is known to exhibit a long-term potentiation (LTP) of synaptic efficacy through a combination of presynaptic and postsynaptic mechanisms. However, the specific postsynaptic mechanisms contributing to LTP of mossy fiber input is unknown. The current study tested the hypothesis that LTP induces a change in intrinsic membrane excitability of rat cerebellar granule cells through modification of Kv4 A-type potassium channels...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27801405/-the-application-of-high-frequency-and-itbs-transcranial-magnetic-stimulation-for-the-treatment-of-spasticity-in-the-patients-presenting-with-secondary-progressive-multiple-sclerosis
#9
Yu E Korzhova, A V Chervyakov, A G Poidasheva, I A Kochergin, A V Peresedova, M N Zakharova, N A Suponeva, L A Chernikova, M A Piradov
: Spasticity is considered to be a common manifestation of multiple sclerosis. Muscle relaxants are not sufficiently effective; more than that, some of them often cause a variety of adverse reactions. Transcranial magnetic stimulation (TMS) can be a promising new tool for the treatment of spasticity. The objective of the present study was to compare the effectiveness of the two TMS protocols: rhythmic (high-frequency) TMS (rTMS) and stimulation with the theta bursts (iTBS) in terms of their ability to reduce spasticity in the patients presenting with multiple sclerosis...
2016: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/27796359/cerebellar-theta-burst-stimulation-modulates-the-neural-activity-of-interconnected-parietal-and-motor-areas
#10
Elias Paolo Casula, Maria Concetta Pellicciari, Viviana Ponzo, Mario Stampanoni Bassi, Domenica Veniero, Carlo Caltagirone, Giacomo Koch
Voluntary movement control and execution are regulated by the influence of the cerebellar output over different interconnected cortical areas, through dentato-thalamo connections. In the present study we applied transcranial magnetic stimulation (TMS) and electroencephalography (EEG) to directly assess the effects of cerebellar theta-burst stimulation (TBS) over the controlateral primary motor cortex (M1) and posterior parietal cortex (PPC) in a group of healthy volunteers. We found a TBS-dependent bidirectional modulation over TMS-evoked activity; specifically, cTBS increased whereas iTBS decreased activity between 100 and 200 ms after TMS, in a similar manner over both M1 and PPC areas...
October 31, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27783219/long-term-plasticity-in-identified-hippocampal-gabaergic-interneurons-in-the-ca1-area-in-vivo
#11
Petrina Yau-Pok Lau, Linda Katona, Peter Saghy, Kathryn Newton, Peter Somogyi, Karri P Lamsa
Long-term plasticity is well documented in synapses between glutamatergic principal cells in the cortex both in vitro and in vivo. Long-term potentiation (LTP) and -depression (LTD) have also been reported in glutamatergic connections to hippocampal GABAergic interneurons expressing parvalbumin (PV+) or nitric oxide synthase (NOS+) in brain slices, but plasticity in these cells has not been tested in vivo. We investigated synaptically-evoked suprathreshold excitation of identified hippocampal neurons in the CA1 area of urethane-anaesthetized rats...
October 25, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27766073/differences-in-motor-evoked-potentials-induced-in-rats-by-transcranial-magnetic-stimulation-under-two-separate-anesthetics-implications-for-plasticity-studies
#12
Matthew Sykes, Natalie A Matheson, Philip W Brownjohn, Alexander D Tang, Jennifer Rodger, Jonathan B H Shemmell, John N J Reynolds
Repetitive transcranial magnetic stimulation (rTMS) is primarily used in humans to change the state of corticospinal excitability. To assess the efficacy of different rTMS stimulation protocols, motor evoked potentials (MEPs) are used as a readout due to their non-invasive nature. Stimulation of the motor cortex produces a response in a targeted muscle, and the amplitude of this twitch provides an indirect measure of the current state of the cortex. When applied to the motor cortex, rTMS can alter MEP amplitude, however, results are variable between participants and across studies...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27747107/sniff-like-patterned-input-results-in-long-term-plasticity-at-the-rat-olfactory-bulb-mitral-and-tufted-cell-to-granule-cell-synapse
#13
Mahua Chatterjee, Fernando Perez de Los Cobos Pallares, Alex Loebel, Michael Lukas, Veronica Egger
During odor sensing the activity of principal neurons of the mammalian olfactory bulb, the mitral and tufted cells (MTCs), occurs in repetitive bursts that are synchronized to respiration, reminiscent of hippocampal theta-gamma coupling. Axonless granule cells (GCs) mediate self- and lateral inhibitory interactions between the excitatory MTCs via reciprocal dendrodendritic synapses. We have explored long-term plasticity at this synapse by using a theta burst stimulation (TBS) protocol and variations thereof...
2016: Neural Plasticity
https://www.readbyqxmd.com/read/27742597/primary-motor-cortex-contributes-to-the-implementation-of-implicit-value-based-rules-during-motor-decisions
#14
Gerard Derosiere, Alexandre Zénon, Andrea Alamia, Julie Duque
In the present study, we investigated the functional contribution of the human primary motor cortex (M1) to motor decisions. Continuous theta burst stimulation (cTBS) was used to alter M1 activity while participants performed a decision-making task in which the reward associated with the subjects' responses (right hand finger movements) depended on explicit and implicit value-based rules. Subjects performed the task over two consecutive days and cTBS occurred in the middle of Day 2, once the subjects were just about to implement implicit rules, in addition to the explicit instructions, to choose their responses, as evident in the control group (cTBS over the right somatosensory cortex)...
October 11, 2016: NeuroImage
https://www.readbyqxmd.com/read/27733607/stimulation-of-ppc-affects-the-mapping-between-motion-and-force-signals-for-stiffness-perception-but-not-motion-control
#15
Raz Leib, Firas Mawase, Amir Karniel, Opher Donchin, John Rothwell, Ilana Nisky, Marco Davare
: How motion and sensory inputs are combined to assess an object's stiffness is still unknown. Here, we provide evidence for the existence of a stiffness estimator in the human posterior parietal cortex (PPC). We showed previously that delaying force feedback with respect to motion when interacting with an object caused participants to underestimate its stiffness. We found that applying theta-burst transcranial magnetic stimulation (TMS) over the PPC, but not the dorsal premotor cortex, enhances this effect without affecting movement control...
October 12, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27729854/accelerated-intermittent-theta-burst-stimulation-for-suicide-risk-in-therapy-resistant-depressed-patients-a-randomized-sham-controlled-trial
#16
Stefanie Desmyter, Romain Duprat, Chris Baeken, Sara Van Autreve, Kurt Audenaert, Kees van Heeringen
Objectives: We aimed to examine the effects and safety of accelerated intermittent Theta Burst Stimulation (iTBS) on suicide risk in a group of treatment-resistant unipolar depressed patients, using an extensive suicide assessment scale. Methods: In 50 therapy-resistant, antidepressant-free depressed patients, an intensive protocol of accelerated iTBS was applied over the left dorsolateral prefrontal cortex (DLPFC) in a randomized, sham-controlled crossover design. Patients received 20 iTBS sessions over 4 days...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27721106/effects-of-cerebellar-theta-burst-stimulation-on-arm-and-neck-movement-kinematics-in-patients-with-focal-dystonia
#17
Matteo Bologna, Giulia Paparella, Andrea Fabbrini, Giorgio Leodori, Lorenzo Rocchi, Mark Hallett, Alfredo Berardelli
OBJECTIVE: To investigate the cerebellar inhibitory influence on the primary motor cortex in patients with focal dystonia using a cerebellar continuous theta-burst stimulation protocol (cTBS) and to evaluate any relationship with movement abnormalities. METHODS: Thirteen patients with focal hand dystonia, 13 patients with cervical dystonia and 13 healthy subjects underwent two sessions: (i) cTBS over the cerebellar hemisphere (real cTBS) and (ii) cTBS over the neck muscles (sham cTBS)...
November 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27692927/effects-of-theta-burst-stimulation-on-suprahyoid-motor-cortex-excitability-in-healthy-subjects
#18
Tuo Lin, Lisheng Jiang, Zulin Dou, Cheng Wu, Feng Liu, Guangqing Xu, Yue Lan
BACKGROUND: Continuous theta burst stimulation (cTBS) and intermittent TBS (iTBS) are powerful patterns of repetitive transcranial magnetic stimulation (rTMS), with substantial potential for motor function rehabilitation post-stroke. However, TBS of suprahyoid motor cortex excitability has not been investigated. This study investigated TBS effects on suprahyoid motor cortex excitability and its potential mechanisms in healthy subjects. METHODS: Thirty-five healthy subjects (23 females; mean age = 21...
August 24, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27666977/aerobic-exercise-abolishes-ctbs-induced-suppression-of-motor-cortical-excitability
#19
Amaya M Singh, Robin E Duncan, W Richard Staines
A preceding bout of acute aerobic exercise can enhance the induction of early long-term potentiation (LTP) in the primary motor cortex (M1). However, the influence of exercise when performed after the induction of plasticity has not been investigated. In addition, it is unclear whether the same effects are seen with techniques that induce long-term depression (LTD). We used continuous theta-burst stimulation (cTBS) to temporarily suppress cortical excitability and investigate whether moderate-intensity cycling exercise would alter the duration or intensity of cTBS after-effects in a nonexercised upper limb muscle...
October 28, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27651067/targeted-transcranial-theta-burst-stimulation-alters-fronto-insular-network-and-prefrontal-gaba
#20
Sarina J Iwabuchi, Felix Raschke, Dorothee P Auer, Peter F Liddle, Sudheer T Lankappa, Lena Palaniyappan
Repetitive transcranial magnetic stimulation (rTMS) has been used worldwide to treat depression. However, the exact physiological effects are not well understood. Pathophysiology of depression involves crucial limbic structures (e.g. insula), and it is still not clear if these structures can be modulated through neurostimulation of surface regions (e.g. dorsolateral prefrontal cortex, DLPFC), and whether rTMS-induced excitatory/inhibitory transmission alterations relate to fronto-limbic connectivity changes...
September 17, 2016: NeuroImage
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