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Theta burst stimulation

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https://www.readbyqxmd.com/read/29653257/%C3%AE-adrenergic-receptors-reduce-the-threshold-for-induction-and-stabilization-of-ltp-and-enhance-its-magnitude-via-multiple-mechanisms-in-the-ventral-but-not-the-dorsal-hippocampus
#1
Vassilios Papaleonidopoulos, Costas Papatheodoropoulos
The hippocampus is a functionally heterogeneous structure with the cognitive and emotional signal processing ascribed to the dorsal (DH) and the ventral hippocampus (VH) respectively. However, the underlying mechanisms are poorly understood. Noradrenaline is released in hippocampus during emotional arousal modulating synaptic plasticity and memory consolidation through activation of β adrenergic receptors (β-ARs). Using recordings of field excitatory postsynaptic potentials from the CA1 field of adult rat hippocampal slices we demonstrate that long-term potentiation (LTP) induced either by theta-burst stimulation (TBS) that mimics a physiological firing pattern of hippocampal neurons or by high-frequency stimulation is remarkably more sensitive to β-AR activation in VH than in DH...
April 10, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29651241/intra-and-inter-regional-priming-of-ipsilateral-human-primary-motor-cortex-with-continuous-theta-burst-stimulation-does-not-induce-consistent-neuroplastic-effects
#2
Michael Do, Melissa Kirkovski, Charlotte B Davies, Soukayna Bekkali, Linda K Byrne, Peter G Enticott
Human responses to non-invasive brain stimulation (NIBS) techniques can be highly variable. Recently, priming protocols involving a conditioning round of NIBS applied to a target brain region prior to the application of a test protocol have shown promise in inducing more reliable effects. We investigated whether intra- or inter-regional priming of the left primary motor cortex (M1) using continuous theta burst stimulation (cTBS) can induce consistent, and reliable modulation of corticospinal excitability. Twenty healthy adults (six males) underwent four cTBS protocols...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29615367/boosting-the-ltp-like-plasticity-effect-of-intermittent-theta-burst-stimulation-using-gamma-transcranial-alternating-current-stimulation
#3
Andrea Guerra, Antonio Suppa, Matteo Bologna, Valentina D'Onofrio, Edoardo Bianchini, Peter Brown, Vincenzo Di Lazzaro, Alfredo Berardelli
BACKGROUND: Transcranial Alternating Current Stimulation (tACS) consists in delivering electric current to the brain using an oscillatory pattern that may entrain the rhythmic activity of cortical neurons. When delivered at gamma frequency, tACS modulates motor performance and GABA-A-ergic interneuron activity. OBJECTIVE: Since interneuronal discharges play a crucial role in brain plasticity phenomena, here we co-stimulated the primary motor cortex (M1) in healthy subjects by means of tACS during intermittent theta-burst stimulation (iTBS), a transcranial magnetic stimulation paradigm known to induce long-term potentiation (LTP)-like plasticity...
March 24, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29602186/molecular-mechanisms-underlying-striatal-synaptic-plasticity-relevance-to-chronic-alcohol-consumption-and-seeking
#4
Kim T Blackwell, Armando G Salinas, Parul Tewatia, Brad English, Jeanette Hellgren Kotaleski, David M Lovinger
The striatum, the input structure of the basal ganglia, is a major site of learning and memory for goal-directed actions and habit formation. Spiny projection neurons of the striatum integrate cortical, thalamic, and nigral inputs to learn associations, with cortico-striatal synaptic plasticity as a learning mechanism. Signaling molecules implicated in synaptic plasticity are altered in alcohol withdrawal, which may contribute to overly strong learning and increased alcohol seeking and consumption. To understand how interactions among signaling molecules produce synaptic plasticity, we implemented a mechanistic model of signaling pathways activated by dopamine D1 receptors, acetylcholine receptors, and glutamate...
March 30, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29601918/effects-of-left-dlpfc-modulation-on-social-cognitive-processes-following-and-prior-to-food-sampling
#5
Peter A Hall, Cassandra J Lowe, Adrian Safati, Huaqi Li, Emilia Klassen, Amer Burhan
BACKGROUND: The dorsolateral prefrontal cortex (dlPFC) plays a central role in the inhibition of eating, but also the modulation of conscious thought processes that might precede, accompany or follow initial food tasting. The latter might be particularly important to the extent that post-tasting cognitions may drive prolonged eating beyond the satiety point. However, we know very little about the effect of the dlPFC on conation following initial food sampling. This investigation compared the effects of dlPFC down-regulation using repetitive transcranial magnetic stimulation (rTMS) on social cognition following (Study 1) and prior to (Study 2) a food consumption opportunity...
March 27, 2018: Appetite
https://www.readbyqxmd.com/read/29592781/no-requirement-of-interlukine-1-for-long-term-potentiation-in-the-anterior-cingulate-cortex-of-adult-mice
#6
Jing-Shan Lu, Qian Song, Ming-Ming Zhang, Min Zhuo
Background The enhanced expression of cytokines in the pathological states suggests that they have important roles in the initiation or maintenance of disease states. FINDINGS: To determine the involvement of cytokines in chronic neuropathic pain, the expression of cytokines in the anterior cingulate cortex neurons in the ligation of the common peroneal nerve mice was investigated. We utilized a cytokine enzyme-linked immunosorbent assay plate array to detect 23 cytokines in total eight mice including a female, and no significant differences were found in those cytokines between the common peroneal nerve model and sham surgery mice...
January 2018: Molecular Pain
https://www.readbyqxmd.com/read/29575288/shifting-patterns-of-polyribosome-accumulation-at-synapses-over-the-course-of-hippocampal-long-term-potentiation
#7
Linnaea E Ostroff, Deborah J Watson, Guan Cao, Patrick H Parker, Heather Smith, Kristen M Harris
Hippocampal long-term potentiation (LTP) is a cellular memory mechanism. For LTP to endure, new protein synthesis is required immediately after induction and some of these proteins must be delivered to specific, presumably potentiated, synapses. Local synthesis in dendrites could rapidly provide new proteins to synapses, but the spatial distribution of translation following induction of LTP is not known. Here we quantified polyribosomes, the sites of local protein synthesis, in CA1 stratum radiatum dendrites and spines from postnatal day 15 rats...
March 25, 2018: Hippocampus
https://www.readbyqxmd.com/read/29565042/astrocytic-water-channel-aquaporin-4-modulates-brain-plasticity-in-both-mice-and-humans-a-potential-gliogenetic-mechanism-underlying-language-associated-learning
#8
J Woo, J E Kim, J J Im, J Lee, H S Jeong, S Park, S-Y Jung, H An, S Yoon, S M Lim, S Lee, J Ma, E Y Shin, Y-E Han, B Kim, E H Lee, L Feng, H Chun, B-E Yoon, I Kang, S R Dager, I K Lyoo, C J Lee
The role of astrocytes in brain plasticity has not been extensively studied compared with that of neurons. Here we adopted integrative translational and reverse-translational approaches to explore the role of an astrocyte-specific major water channel in the brain, aquaporin-4 (AQP4), in brain plasticity and learning. We initially identified the most prevalent genetic variant of AQP4 (single nucleotide polymorphism of rs162008 with C or T variation, which has a minor allele frequency of 0.21) from a human database (n=60 706) and examined its functionality in modulating the expression level of AQP4 in an in vitro luciferase reporter assay...
April 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29560909/subgenual-anterior-cingulate-medial-orbitofrontal-functional-connectivity-in-medication-resistant-major-depression-a-neurobiological-marker-for-accelerated-intermittent-theta-burst-stimulation-treatment
#9
Chris Baeken, Romain Duprat, Guo-Rong Wu, Rudi De Raedt, Kees van Heeringen
BACKGROUND: Accelerated repetitive transcranial magnetic stimulation paradigms have been shown to result in fast decreases in depressive symptoms and suicidal ideation. Although the subgenual anterior cingulate cortex (sgACC) region has been put forward as a possible biological marker, so far, no studies evaluated the clinical effects of accelerated intermittent theta burst stimulation (aiTBS) on sgACC functional connectivity (FC). METHODS: Fifty patients with treatment-resistant depression were enrolled in this registered randomized double-blind sham-controlled crossover aiTBS treatment study...
October 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29537707/effects-of-endogenous-and-exogenous-d1-d5-dopamine-receptor-activation-on-ltp-in-ventral-and-dorsal-ca1-hippocampal-synapses
#10
Vassilios Papaleonidopoulos, Stylianos Kouvaros, Costas Papatheodoropoulos
Hippocampus is importantly involved in dopamine-dependent behaviors and dopamine is a significant modulator of synaptic plasticity in the hippocampus. Moreover, the dopaminergic innervation appears to be disproportionally segregated along the hippocampal longitudinal (dorsoventral) axis with unknown consequences for synaptic plasticity. In this study we examined the actions of endogenously released dopamine and the effects of exogenous D1/D5 dopamine receptor agonists on theta-burst stimulation-induced long-term potentiation (LTP) of field excitatory synaptic potential (fEPSP) at Schaffer collateral-CA1 synapses in slices from dorsal (DH) and ventral hippocampus (VH)...
March 14, 2018: Synapse
https://www.readbyqxmd.com/read/29519725/neuropeptide-y-as-a-possible-homeostatic-element-for-changes-in-cortical-excitability-induced-by-repetitive-transcranial-magnetic-stimulation
#11
Danny Jazmati, Ute Neubacher, Klaus Funke
BACKGROUND: Repetitive transcranial magnetic stimulation (rTMS) is able to modify cortical excitability. Rat rTMS studies revealed a modulation of inhibitory systems, in particular that of the parvalbumin-expressing (PV+) interneurons, when using intermittent theta-burst stimulation (iTBS). OBJECTIVE: The potential disinhibitory action of iTBS raises the questions of how neocortical circuits stabilize excitatory-inhibitory balance within a physiological range. Neuropeptide Y (NPY) appears to be one candidate...
February 24, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29507375/low-intensity-repetitive-transcranial-magnetic-stimulation-modulates-skilled-motor-learning-in-adult-mice
#12
Alexander D Tang, William Bennett, Claire Hadrill, Jessica Collins, Barbora Fulopova, Karen Wills, Aidan Bindoff, Rohan Puri, Michael I Garry, Mark R Hinder, Jeffery J Summers, Jennifer Rodger, Alison J Canty
Repetitive transcranial magnetic stimulation (rTMS) is commonly used to modulate cortical plasticity in clinical and non-clinical populations. Clinically, rTMS is delivered to targeted regions of the cortex at high intensities (>1 T). We have previously shown that even at low intensities, rTMS induces structural and molecular plasticity in the rodent cortex. To determine whether low intensity rTMS (LI-rTMS) alters behavioural performance, daily intermittent theta burst LI-rTMS (120 mT) or sham was delivered as a priming or consolidating stimulus to mice completing 10 consecutive days of skilled reaching training...
March 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29505803/excitatory-repetitive-transcranial-magnetic-stimulation-applied-to-the-right-inferior-frontal-gyrus-has-no-effect-on-motor-or-cognitive-impulsivity-in-healthy-adults
#13
Cheng-Chang Yang, Najat Khalifa, Birgit Völlm
BACKGROUND: Impulsivity is a multi-faceted concept. It is a crucial feature of many neuropsychiatric disorders. Three subtypes of impulsivity have been identified: motor, temporal, and cognitive impulsivity. Existing evidence suggests that the right inferior frontal gyrus (rIFG) plays a crucial role in impulsivity, and such a role has been elucidated using inhibitory repetitive transcranial magnetic stimulation (rTMS). There is a dearth of studies using excitatory rTMS at the rIFG, an important gap in the literature this study aimed to address...
March 2, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29504190/advancing-transcranial-magnetic-stimulation-methods-for-complex-regional-pain-syndrome-an-open-label-study-of-paired-theta-burst-and-high-frequency-stimulation
#14
Mark Gaertner, Jiang-Ti Kong, Kristen H Scherrer, Alyssa Foote, Sean Mackey, Kevin A Johnson
INTRODUCTION: Complex Regional Pain Syndrome (CRPS), a rare and severe chronic pain condition, often responds poorly to existing treatments. Previous studies demonstrated Transcranial Magnetic Stimulation (TMS) provided short-term pain relief for upper extremity CRPS. METHODS: Building on previous methodologies, we employed a TMS protocol that may lead to significant pain relief for upper and lower extremity CRPS in a nonrandomized open label pilot trial involving 21 participants...
March 4, 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29459720/controlling-striatal-function-via-anterior-frontal-cortex-stimulation
#15
Mieke van Holstein, Monja I Froböse, Jacinta O'Shea, Esther Aarts, Roshan Cools
Motivational, cognitive and action goals are processed by distinct, topographically organized, corticostriatal circuits. We aimed to test whether processing in the striatum is under causal control by cortical regions in the human brain by investigating the effects of offline transcranial magnetic stimulation (TMS) over distinct frontal regions associated with motivational, cognitive and action goal processing. Using a three-session counterbalanced within-subject crossover design, continuous theta burst stimulation was applied over the anterior prefrontal cortex (aPFC), dorsolateral prefrontal cortex, or premotor cortex, immediately after which participants (N = 27) performed a paradigm assessing reward anticipation (motivation), task (cognitive) switching, and response (action) switching...
February 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29451889/effects-of-patterned-peripheral-nerve-stimulation-on-soleus-spinal-motor-neuron-excitability
#16
Samuel Jimenez, Laura Mordillo-Mateos, Michele Dileone, Michela Campolo, Carmen Carrasco-Lopez, Fabricia Moitinho-Ferreira, Tomas Gallego-Izquierdo, Hartwig R Siebner, Josep Valls-Solé, Juan Aguilar, Antonio Oliviero
Spinal plasticity is thought to contribute to sensorimotor recovery of limb function in several neurological disorders and can be experimentally induced in animals and humans using different stimulation protocols. In healthy individuals, electrical continuous Theta Burst Stimulation (TBS) of the median nerve has been shown to change spinal motoneuron excitability in the cervical spinal cord as indexed by a change in mean H-reflex amplitude in the flexor carpi radialis muscle. It is unknown whether continuous TBS of a peripheral nerve can also shift motoneuron excitability in the lower limb...
2018: PloS One
https://www.readbyqxmd.com/read/29439364/enhancement-of-motor-learning-by-focal-intermittent-theta-burst-stimulation-itbs-of-either-the-primary-motor-m1-or-somatosensory-area-s1-in-healthy-human-subjects
#17
Thomas Platz, Marija Adler-Wiebe, Sybille Roschka, Martin Lotze
BACKGROUND: Motor rehabilitation after brain damage relies on motor re-learning as induced by specific training. Non-invasive brain stimulation (NIBS) can alter cortical excitability and thereby has a potential to enhance subsequent training-induced learning. Knowledge about any priming effects of NIBS on motor learning in healthy subjects can help to design targeted therapeutic applications in brain-damaged subjects. OBJECTIVE: To examine whether complex motor learning in healthy subjects can be enhanced by intermittent theta burst stimulation (iTBS) to primary motor or sensory cortical areas...
2018: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29438672/the-effects-of-theta-burst-stimulation-tbs-targeting-the-prefrontal-cortex-on-executive-functioning-a-systematic-review-and-meta-analysis
#18
REVIEW
Cassandra J Lowe, Felicia Manocchio, Adrian B Safati, Peter A Hall
Continuous theta burst stimulation (TBS) is a highly efficient variant of repetitive transcranial magnetic stimulation (rTMS) employed in experimental and clinical treatment paradigms. Despite widespread usage of TBS targeting the prefrontal cortex (PFC), there has been no systematic review of the evidence linking TBS protocols to changes in task performance on common measures of prefrontal function in general, and executive functions specifically. A systematic review of the literature was conducted using PsycINFO, PubMed, Web of Science and Scopus databases to identify articles examining the effects of TBS targeting the PFC on executive function task performance...
February 10, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29410617/long-term-potentiation-decay-and-poor-long-lasting-memory-process-in-the-wild-rodents-proechimys-from-brazil-s-amazon-rainforest
#19
Marcia J Guimarães Marques, Selvin Z Reyes-Garcia, José E Marques-Carneiro, Leonardo B Lopes-Silva, Monica L Andersen, Esper A Cavalheiro, Fulvio A Scorza, Carla A Scorza
Proechimys are small terrestrial rodents from Amazon rainforest. Each animal species is adapted to a specific environment in which the animal evolved therefore without comparative approaches unique characteristics of distinct species cannot be fully recognized. Laboratory rodents are exceedingly inbred strains dissociated from their native habitats and their fundamental ecological aspects are abstracted. Thus, the employment of exotic non-model species can be informative and complement conventional animal models...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29397191/modulation-of-intra-and-inter-hemispheric-connectivity-between-primary-and-premotor-cortex-during-speech-perception
#20
Helen E Nuttall, Dan Kennedy-Higgins, Joseph T Devlin, Patti Adank
Primary motor (M1) areas for speech production activate during speechperception. It has been suggested that such activation may be dependent upon modulatory inputs from premotor cortex (PMv). If and how PMv differentially modulates M1 activity during perception of speech that is easy or challenging to understand, however, is unclear. This study aimed to test the link between PMv and M1 during challenging speech perception in two experiments. The first experiment investigated intra-hemispheric connectivity between left hemisphere PMv and left M1 lip area during comprehension of speech under clear and distorted listening conditions...
January 31, 2018: Brain and Language
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