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Transcranial alternating current stimulation

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https://www.readbyqxmd.com/read/28203084/use-of-transcranial-direct-current-stimulation-for-the-treatment-of-auditory-hallucinations-of-schizophrenia-a-systematic-review
#1
REVIEW
Pedro H Pondé, Eduardo P de Sena, Joan A Camprodon, Arão Nogueira de Araújo, Mário F Neto, Melany DiBiasi, Abrahão Fontes Baptista, Lidia Mvr Moura, Camila Cosmo
INTRODUCTION: Auditory hallucinations are defined as experiences of auditory perceptions in the absence of a provoking external stimulus. They are the most prevalent symptoms of schizophrenia with high capacity for chronicity and refractoriness during the course of disease. The transcranial direct current stimulation (tDCS) - a safe, portable, and inexpensive neuromodulation technique - has emerged as a promising treatment for the management of auditory hallucinations. OBJECTIVE: The aim of this study is to analyze the level of evidence in the literature available for the use of tDCS as a treatment for auditory hallucinations in schizophrenia...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28197084/transcranial-alternating-current-stimulation-tacs-enhances-mental-rotation-performance-during-and-after-stimulation
#2
Florian H Kasten, Christoph S Herrmann
Transcranial alternating current stimulation (tACS) has been repeatedly demonstrated to modulate endogenous brain oscillations in a frequency specific manner. Thus, it is a promising tool to uncover causal relationships between brain oscillations and behavior or perception. While tACS has been shown to elicit a physiological aftereffect for up to 70 min, it remains unclear whether the effect can still be elicited if subjects perform a complex task interacting with the stimulated frequency band. In addition, it has not yet been investigated whether the aftereffect is behaviorally relevant...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28159637/transcranial-magnetic-stimulation-tms-responses-elicited-in-hindlimb-muscles-as-an-assessment-of-synaptic-plasticity-in-spino-muscular-circuitry-after-chronic-spinal-cord-injury
#3
Hayk A Petrosyan, Valentina Alessi, Sue A Sisto, Mark Kaufman, Victor L Arvanian
Electromagnetic stimulation applied at the cranial level, i.e. transcranial magnetic stimulation (TMS), is a technique for stimulation and neuromodulation used for diagnostic and therapeutic applications in clinical and research settings. Although recordings of TMS elicited motor-evoked potentials (MEP) are an essential diagnostic tool for spinal cord injured (SCI) patients, they are reliably recorded from arm, and not leg muscles. Mid-thoracic contusion is a common SCI that results in locomotor impairments predominantly in legs...
January 31, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28137971/transcranial-alternating-current-stimulation-attenuates-neuronal-adaptation
#4
Kohitij Kar, Jacob Duijnhouwer, Bart Krekelberg
: We previously showed that brief application of 2 mA (peak-to-peak) transcranial currents alternating at 10 Hz significantly reduces motion adaptation in humans. This is but one of many behavioral studies showing that weak currents applied to the scalp modulate neural processing. Transcranial stimulation has been shown to improve perception, learning, and a range of clinical symptoms. Few studies, however, have measured the neural consequences of transcranial current stimulation. We capitalized on the strong link between motion perception and neural activity in the middle temporal (MT) area of the macaque monkey to study the neural mechanisms that underlie the behavioral consequences of transcranial alternating current stimulation (tACS)...
January 30, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28119510/interpersonal-synchrony-enhanced-through-20-hz-phase-coupled-dual-brain-stimulation
#5
Giacomo Novembre, Günther Knoblich, Laura Dunne, Peter E Keller
Synchronous movement is a key component of social behaviour in several species including humans. Recent theories have suggested a link between interpersonal synchrony of brain oscillations and interpersonal movement synchrony. The present study investigated this link. Using transcranial alternating current stimulation (tACS) applied over the left motor cortex, we induced beta band (20 Hz) oscillations in pairs of individuals who both performed a finger-tapping task with the right hand. In-phase or anti-phase oscillations were delivered during a preparatory period prior to movement and while the tapping task was performed...
January 24, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28064346/effects-of-cerebellar-transcranial-alternating-current-stimulation-on-motor-cortex-excitability-and-motor-function
#6
Antonino Naro, Alessia Bramanti, Antonino Leo, Alfredo Manuli, Francesca Sciarrone, Margherita Russo, Placido Bramanti, Rocco Salvatore Calabrò
The cerebellum regulates several motor functions through two main mechanisms, the cerebellum-brain inhibition (CBI) and the motor surround inhibition (MSI). Although the exact cerebellar structures and functions involved in such processes are partially known, Purkinje cells (PC) and their surrounding interneuronal networks may play a pivotal role concerning CBI and MSI. Cerebellar transcranial alternating current stimulation (tACS) has been proven to shape specific cerebellar components in a feasible, safe, effective, and non-invasive manner...
January 7, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28059806/intrahemispheric-theta-rhythm-desynchronization-impairs-working-memory
#7
Ivan Alekseichuk, Stefanie Corinna Pabel, Andrea Antal, Walter Paulus
BACKGROUND: There is a growing interest in large-scale connectivity as one of the crucial factors in working memory. Correlative evidence has revealed the anatomical and electrophysiological players in the working memory network, but understanding of the effective role of their connectivity remains elusive. OBJECTIVE: In this double-blind, placebo-controlled study we aimed to identify the causal role of theta phase connectivity in visual-spatial working memory. METHODS: The frontoparietal network was over- or de-synchronized in the anterior-posterior direction by multi-electrode, 6 Hz transcranial alternating current stimulation (tACS)...
January 3, 2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28057536/transcranial-alternating-current-stimulation-to-the-inferior-parietal-lobe-decreases-mu-suppression-to-egocentric-but-not-allocentric-hand-movements
#8
Monica B Berntsen, Nicholas R Cooper, Vincenzo Romei
Egocentric vs. allocentric perspective during observation of hand movements has been related to self-other differentiation such that movements observed from an egocentric viewpoint have been considered as self-related while movements observed from an allocentric viewpoint have been considered as belonging to someone else. Correlational studies have generally found that egocentric perspective induces greater neurophysiological responses and larger behavioral effects compared to an allocentric perspective. However, recent studies question previous findings by reporting greater (μ) suppression and greater transcranial magnetic stimulation (TMS)-induced motor-evoked potentials (MEPs) during observation of allocentric compared to egocentric movements...
March 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28055126/neuromodulation-therapies-for-alcohol-addiction-a-literature-review
#9
REVIEW
Celeste A Azevedo, Antonios Mammis
OBJECTIVES: The goal of this review is to explore alternative neurological therapies in the treatment of alcohol use disorder; including transcranial direct current stimulation (tDCS), transcranial magnetic stimulation, deep brain stimulation (DBS), electroconvulsive therapy (ECT), and the off-label use of the GABAB receptor agonist baclofen. METHODS: A comprehensive literature search was conducted through EBSCOhost regarding the neurological therapies in the treatment of alcoholism discussed in this paper...
January 5, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28045853/intraoperative-neuromonitoring-and-alarm-criteria-for-judging-mep-responses-to-transcranial-electric-stimulation-the-threshold-level-method
#10
Blair Calancie
The motor evoked potential (MEP) is used in the operating room to gauge-and ultimately protect-the functional integrity of the corticospinal tract (CST). However, there is no consensus as to how to best interpret the MEP for maximizing its sensitivity and specificity to CST compromise. The most common way is to use criteria associated with response magnitude (response amplitude; waveform complexity, etc.). With this approach, should an MEP in response to a fixed stimulus intensity diminish below some predetermined cutoff, suggesting CST dysfunction, then the surgical team is warned...
January 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28004906/transcranial-and-spinal-cord-magnetic-stimulation-in-treatment-of-spasticity-a-literature-review-and-meta-analysis
#11
Julia Korzhova, Dmitry Sinitsyn, Alexander Chervyakov, Alexandra Poydasheva, Maria Zakharova, Natalia Suponeva, Lyudmila Chernikova, Michael Piradov
INTRODUCTION: Spasticity is associated with various diseases of the nervous system. Current treatments such as drug therapy, botulinum toxin injections, kinesitherapy, and physiotherapy are not sufficiently effective in a large number of patients. Transcranial magnetic stimulation (TMS) can be considered as an alternative method of treatment. The purpose of this article is to conduct a systematic review and meta-analysis of all available publications assessing the efficacy of repetitive TMS in treatment of spasticity...
December 22, 2016: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27984542/transcranial-direct-current-stimulation-over-the-opercular-somatosensory-region-does-not-influence-experimentally-induced-pain-a-triple-blind-sham-controlled-study
#12
Soichiro Koyama, Kei Nakagawa, Satoshi Tanaka
Transcranial magnetic stimulation (TMS) over the opercular somatosensory region (OP), which includes the secondary somatosensory cortex and the insular cortex, suppresses pain sensation. However, whether transcranial direct current stimulation (tDCS) over the OP has a similar effect on pain sensation remains unknown. We examined whether pain sensation would be suppressed by tDCS over the OP. Our experiment with a triple-blind, sham-controlled, crossover design involved 12 healthy participants. Participants were asked to rate their subjective pain intensity during and after three types of bihemispheric tDCS: right anodal/left cathodal OP tDCS, left anodal/right cathodal OP tDCS (2 mA, 12 min), and sham tDCS (15 s)...
February 8, 2017: Neuroreport
https://www.readbyqxmd.com/read/27977327/tdcs-potentiation-provides-no-evidence-for-a-link-between-right-dorsal-lateral-prefrontal-cortical-activity-and-empathic-responding
#13
Marion E Snowdon, Stuart Cathcart
Previous studies suggest the dorsolateral prefrontal cortex (DLPFC) is involved in processing of empathic concern. This has not been experimentally tested to date. We tested the hypotheses that electrical potentiation in the right DLPFC would be associated with increased empathic concern and prosocial behavior. Participants were randomly allocated to one of three transcranial Direct Current Stimulation (tDCS) conditions: (a) relative right potentiation, (b) relative left potentiation, and (c) sham. Participants viewed images of African children in distressing circumstances, and completed measures of empathic concern pre- and post-tDCS manipulation...
January 2, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/27965623/transcranial-alternating-current-stimulation-a-potential-risk-for-genetic-generalized-epilepsy-patients-study-case
#14
Daniel San-Juan, Carlos Ignacio Sarmiento, Axel Hernandez-Ruiz, Ernesto Elizondo-Zepeda, Gabriel Santos-Vázquez, Gerardo Reyes-Acevedo, Héctor Zúñiga-Gazcón, Carol Marina Zamora-Jarquín
Transcranial alternating current stimulation (tACS) is a re-emergent neuromodulation technique that consists in the external application of oscillating electrical currents that induces changes in cortical excitability. We present the case of a 16-year-old female with pharmaco-resistant juvenile myoclonic epilepsy to 3 antiepileptic's drugs characterized by 4 myoclonic and 20 absence seizures monthly. She received tACS at 1 mA at 3 Hz pulse train during 60 min over Fp1-Fp2 (10-20 EEG international system position) during 4 consecutive days using an Endeavor™ IOM Systems device(®) (Natus Medical Incorporated, Middleton, WI, USA)...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27965597/transcranial-direct-current-stimulation-effects-on-athletes-cognitive-performance-an-exploratory-proof-of-concept-trial
#15
Davimar M M Borducchi, July Silveira Gomes, Henrique Akiba, Quirino Cordeiro, José Henrique M Borducchi, Lívia Stocco Sanches Valentin, Gabrielle M Borducchi, Álvaro Machado Dias
Among the 2016 Olympic and Paralympic Games' unforgettable moments, one could not overlook performances by Phelps and Bolt, which challenge old premises about the maximum extension of individual supremacism in ultracompetitive modalities and the doping scandals. Different media channels resonated these two trends, with an unseen rise on discussions about traits and practices that may set ultrahigh performance athletes apart from the more ordinary ones. Yet, some key issues remain undebated. This paper aims to add to this debate, with a proof of concept trial, which investigates whether transcranial direct current stimulation (tDCS) may serve as an aid for professional athletes...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27965067/physiological-and-behavioral-effects-of-%C3%AE-tacs-on-brain-self-regulation-in-chronic-stroke
#16
Georgios Naros, Alireza Gharabaghi
BACKGROUND: Unlike in healthy controls, sensorimotor β-desynchronization (β-ERD) is compromised in stroke patients, i.e., the more severe the patient's motor impairment, the less β-ERD. This, in turn, provides a target substrate for therapeutic brain self-regulation and neurofeedback. OBJECTIVE: Transcranial alternating current stimulation (tACS) has been shown to modulate brain oscillations during and after stimulation, and may thus facilitate brain self-regulation during neurofeedback interventions...
November 9, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27919314/advances-in-the-neuroscience-of-intelligence-from-brain-connectivity-to-brain-perturbation
#17
Emiliano Santarnecchi, Simone Rossi
Our view is that intelligence, as expression of the complexity of the human brain and of its evolutionary path, represents an intriguing example of "system level brain plasticity": tangible proofs of this assertion lie in the strong links intelligence has with vital brain capacities as information processing (i.e., pure, rough capacity to transfer information in an efficient way), resilience (i.e., the ability to cope with loss of efficiency and/or loss of physical elements in a network) and adaptability (i...
December 6, 2016: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/27917748/making-brains-run-faster-are-they-becoming-smarter
#18
Anja Pahor, Norbert Jaušovec
A brief overview of structural and functional brain characteristics related to g is presented in the light of major neurobiological theories of intelligence: Neural Efficiency, P-FIT and Multiple-Demand system. These theories provide a framework to discuss the main objective of the paper: what is the relationship between individual alpha frequency (IAF) and g? Three studies were conducted in order to investigate this relationship: two correlational studies and a third study in which we experimentally induced changes in IAF by means of transcranial alternating current stimulation (tACS)...
December 5, 2016: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/27901245/transcranial-direct-current-stimulation-for-treatment-resistant-obsessive-compulsive-disorder-report-on-two-cases-and-proposal-for-a-randomized-sham-controlled-trial
#19
Renata de Melo Felipe da Silva, André Russowsky Brunoni, Eurípedes Constantino Miguel, Roseli Gedanke Shavitt
CONTEXT AND OBJECTIVE: Neuromodulation techniques for treating obsessive-compulsive disorder (OCD) have expanded through greater understanding of the brain circuits involved in this disorder. Transcranial direct current stimulation (tDCS), a non-invasive technique, has been studied as an alternative for treatment-resistant OCD. We describe the design of a clinical trial using tDCS for OCD and report on the outcomes from two patients with primary OCD who were resistant to cognitive-behavioral therapy and to selective serotonin reuptake inhibitors, and who received tDCS in an open manner during the training phase for the study procedures...
September 2016: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/27888060/faith-and-oscillations-recovered-on-analyzing-eeg-meg-signals-during-tacs
#20
Toralf Neuling, Philipp Ruhnau, Nathan Weisz, Christoph S Herrmann, Gianpaolo Demarchi
Despite recent success in analyzing brain oscillations recorded during transcranial alternating current stimulation (tACS), the field still requires further research to establish standards in artifact removal methods. This includes taking a step back from the removal of the tACS artifact and thoroughly characterizing the to-be-removed artifact. A recent study by Noury et al. (2016) contributed importantly to this endeavour by showing the existence of nonlinear artefacts in the tACS signal as seen by MEG and EEG...
February 15, 2017: NeuroImage
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