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Transcranial direct current stimulation

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https://www.readbyqxmd.com/read/28107684/non-invasive-brain-stimulation-targeting-the-right-fusiform-gyrus-selectively-increases-working-memory-for-faces
#1
Tad T Brunyé, Joseph M Moran, Amanda Holmes, Caroline R Mahoney, Holly A Taylor
The human extrastriate cortex contains a region critically involved in face detection and memory, the right fusiform gyrus. The present study evaluated whether transcranial direct current stimulation (tDCS) targeting this anatomical region would selectively influence memory for faces versus non-face objects (houses). Anodal tDCS targeted the right fusiform gyrus (Brodmann's Area 37), with the anode at electrode site PO10, and cathode at FP2. Two stimulation conditions were compared in a repeated-measures design: 0...
January 17, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28104432/relationship-between-physiological-excitatory-and-inhibitory-measures-of-excitability-in-the-left-vs-right-human-motor-cortex-and-peripheral-electrodermal-activity
#2
Martina Bracco, Patrizia Turriziani, Daniela Smirni, Renata Giuseppa Mangano, Massimiliano Oliveri
The current study was aimed at investigating the relationships of excitatory and inhibitory circuits of the left vs. right primary motor cortex with peripheral electrodermal activity (EDA). Ten healthy subjects participated in two experimental sessions. In each session, EDA was recorded for 10minutes from the palmar surface of the left hand. Immediately after EDA recording, Transcranial Magnetic Stimulation (TMS) was used to probe excitatory and inhibitory circuits of the left or right primary motor cortex using two protocols of stimulation: the input-output curve for recording of motor evoked potentials, for testing excitatory circuits; the long-interval cortical inhibition (LICI) protocol, for testing inhibitory circuits...
January 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28104085/direct-current-stimulation-modulates-ltp-and-ltd-activity-dependence-and-dendritic-effects
#3
Greg Kronberg, Morgan Bridi, Ted Abel, Marom Bikson, Lucas C Parra
BACKGROUND: Transcranial direct current stimulation (tDCS) has been reported to improve various forms of learning in humans. Stimulation is often applied during training, producing lasting enhancements that are specific to the learned task. These learning effects are thought to be mediated by altered synaptic plasticity. However, the effects of DCS during the induction of endogenous synaptic plasticity remain largely unexplored. OBJECTIVE/HYPOTHESIS: Here we are interested in the effects of DCS applied during synaptic plasticity induction...
January 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28099522/anodal-transcranial-direct-current-stimulation-shows-minimal-measure-specific-effects-on-dynamic-postural-control-in-young-and-older-adults-a-double-blind-sham-controlled-study
#4
Chesney E Craig, Michail Doumas
We investigated whether stimulating the cerebellum and primary motor cortex (M1) using transcranial direct current stimulation (tDCS) could affect postural control in young and older adults. tDCS was employed using a double-blind, sham-controlled design, in which young (aged 18-35) and older adults (aged 65+) were assessed over three sessions, one for each stimulatory condition-M1, cerebellar and sham. The effect of tDCS on postural control was assessed using a sway-referencing paradigm, which induced platform rotations in proportion to the participant's body sway, thus assessing sensory reweighting processes...
2017: PloS One
https://www.readbyqxmd.com/read/28094034/dynamical-representation-of-dominance-relationships-in-the-human-rostromedial-prefrontal-cortex
#5
Romain Ligneul, Ignacio Obeso, Christian C Ruff, Jean-Claude Dreher
Humans and other primates have evolved the ability to represent their status in the group's social hierarchy, which is essential for avoiding harm and accessing resources. Yet it remains unclear how the human brain learns dominance status and adjusts behavior accordingly during dynamic social interactions. Here we address this issue with a combination of fMRI and transcranial direct current stimulation (tDCS). In a first fMRI experiment, participants learned an implicit dominance hierarchy while playing a competitive game against three opponents of different skills...
December 5, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/28089696/differential-sensory-cortical-involvement-in-auditory-and-visual-sensorimotor-temporal-recalibration-evidence-from-transcranial-direct-current-stimulation-tdcs
#6
Ali Aytemür, Nathalia Almeida, Kwang-Hyuk Lee
Adaptation to delayed sensory feedback following an action produces a subjective time compression between the action and the feedback (temporal recalibration effect, TRE). TRE is important for sensory delay compensation to maintain a relationship between causally related events. It is unclear whether TRE is a sensory modality-specific phenomenon. In 3 experiments employing a sensorimotor synchronization task, we investigated this question using cathodal transcranial direct-current stimulation (tDCS). We found that cathodal tDCS over the visual cortex, and to a lesser extent over the auditory cortex, produced decreased visual TRE...
January 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28089321/a-single-session-of-prefrontal-cortex-transcranial-direct-current-stimulation-does-not-modulate-implicit-task-sequence-learning-and%C3%A2-consolidation
#7
Branislav Savic, René Müri, Beat Meier
BACKGROUND: Transcranial direct current stimulation (tDCS) is assumed to affect cortical excitability and dependent on the specific stimulation conditions either to increase or decrease learning. OBJECTIVE: The purpose of this study was to modulate implicit task sequence learning with tDCS. METHODS: As cortico-striatal loops are critically involved in implicit task sequence learning, tDCS was applied above the dorsolateral prefrontal cortex (DLPFC)...
January 4, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28088713/the-effects-of-utterance-timing-and-stimulation-of-left-prefrontal-cortex-on-the-production-of-referential-expressions
#8
Jennifer E Arnold, Nazbanou Nozari
We examined the relationship between the timing of utterance initiation and the choice of referring expressions, e.g., pronouns (it), zeros (…and went down), or descriptive NPs (the pink pentagon). We examined language production in healthy adults, and used anodal transcranial direct current stimulation (tDCS) to test the involvement of the left prefrontal cortex (PFC) in the timing of utterance production and the selection of reference forms in a discourse context. Twenty-two subjects (11 anodal, 11sham) described fast-paced actions, e...
January 12, 2017: Cognition
https://www.readbyqxmd.com/read/28069925/cerebellar-tdcs-modulates-neural-circuits-during-semantic-prediction-a-combined-tdcs-fmri-study
#9
Anila M D'Mello, Peter E Turkeltaub, Catherine J Stoodley
: It has been proposed that the cerebellum acquires internal models of mental processes that enable prediction, allowing for the optimization of behavior. In language, semantic prediction speeds speech production and comprehension. Right cerebellar lobules VI and VII (including Crus I/II) are engaged during a variety of language processes and are functionally connected with cerebral cortical language networks. Further, right posterolateral cerebellar neuromodulation modifies behavior during predictive language processing...
January 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28064113/cognitive-control-dysfunction-in-emotion-dysregulation-and-psychopathology-of-major-depression-md-evidence-from-transcranial-brain-stimulation-of-the-dorsolateral-prefrontal-cortex-dlpfc
#10
Mohammad Ali Salehinejad, Elham Ghanavai, Reza Rostami, Vahid Nejati
BACKGROUND: Previous studies showed that MD is associated with a variety of cognitive deficits and executive dysfunctions which can persist even in remitted states. However, the role of cognitive impairments in MD psychopathology and treatment is not fully understood. This article aims to discuss how executive functions central components (e.g., Working memory and attention) mediate MD psychopathology considering the role of dorsolateral prefrontal cortex (dLPFC) and present findings of a brain stimulation experiment to support this notion...
December 31, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28062255/differential-effects-of-bihemispheric-and-unihemispheric-transcranial-direct-current-stimulation-in-young-and-elderly-adults-in-verbal-learning
#11
Valentina Fiori, Michael Nitsche, Luigi Iasevoli, Gabriella Cucuzza, Carlo Caltagirone, Paola Marangolo
For the past few years, the potential of transcranial direct current stimulation (tDCS) for the treatment of several pathologies has been investigated. In the language domain, several studies, in healthy and brain-damaged populations, have already shown that tDCS is effective in enhancing naming, repetition and semantic word generation. In those studies, different tDCS electrode configurations have been tested, however, a direct comparison between different montages in verbal learning has never been conducted...
January 3, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28059806/intrahemispheric-theta-rhythm-desynchronization-impairs-working-memory
#12
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/28059801/repeated-anodal-transcranial-direct-current-stimulation-induces-neural-plasticity-associated-gene-expression-in-the-rat-cortex-and-hippocampus
#13
Min Sun Kim, Ho Koo, Sang Who Han, Walter Paulus, Michael A Nitsche, Yun-Hee Kim, Jin A Yoon, Yong-Il Shin
BACKGROUND: Anodal transcranial direct current stimulation (A-tDCS) induces a long-lasting increase in cortical excitability that can increase gene transcription in the brain. OBJECTIVE: The purpose of this study was to evaluate the expression of genes related to activity-dependent neuronal plasticity in the sensorimotor cortex and hippocampus of young Sprague-Dawley rats following A-tDCS. METHODS: We applied A-tDCS over the right sensorimotor cortex epicranially with a circular electrode (3 mm diameter) at 250 μA for 20 min per day for 7 consecutive days...
January 4, 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
#14
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...
January 3, 2017: Neuroscience
https://www.readbyqxmd.com/read/28057452/stimulating-cognition-in-schizophrenia-a-controlled-pilot-study-of-the-effects-of-prefrontal-transcranial-direct-current-stimulation-upon-memory-and-learning
#15
Natasza D Orlov, Derek K Tracy, Daniel Joyce, Shinal Patel, Joanna Rodzinka-Pasko, Hayley Dolan, John Hodsoll, Tracy Collier, John Rothwell, Sukhwinder S Shergill
BACKGROUND: Schizophrenia is characterized by prominent cognitive deficits, impacting on memory and learning; these are strongly associated with the prefrontal cortex. OBJECTIVE/HYPOTHESIS: To combine two interventions, transcranial direct current stimulation (tDCS) over the prefrontal cortex and cognitive training, to examine change in cognitive performance in patients with schizophrenia. METHODS: A double blind, sham-controlled pilot study of 49 patients with schizophrenia, randomized into real or sham tDCS stimulation groups...
December 28, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/28057449/transcranial-direct-current-stimulation-improves-visual-acuity-in-amblyopic-long-evans-rats
#16
S Castaño-Castaño, A G Moll, M Morales, E Fernadez, F Sanchez-Santed, F Nieto-Escamez
Transcranial Direct Current Stimulation (tDCS) has proved to increase brain cortex plasticity and different models of brain damage. In this work, we have analyzed the effects of tDCS in an experimental model of amblyopia using Long-Evans rats. Animals were monocularly deprived between 12 and 75 postnatal days and visual cortex contralateral to the deprived eye was stimulated using anodal tDCS during 8 days (20 min/day). The effects of tDCS treatment on the visual function were evaluated by using the optomotor reflex of the animals as a measure of visual acuity...
January 2, 2017: Brain Research
https://www.readbyqxmd.com/read/28055126/neuromodulation-therapies-for-alcohol-addiction-a-literature-review
#17
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/28044315/the-electric-field-distributions-in-anatomical-head-models-during-transcranial-direct-current-stimulation-for-post-stroke-rehabilitation
#18
Zoi Manoli, Marta Parazzini, Paolo Ravazzani, Theodoros Samaras
PURPOSE: The lack of knowledge of the electric field distribution inside the brain of stroke patients receiving transcranial direct current stimulation (tDCS) calls for estimating it computationally. Moreover, the impact on this distribution of a novel clinical management approach which involves secondary motor areas (SMA) in stroke rehabilitation needs to be evaluated. Finally, the differences in the electric field distributions due to gender and age need to be investigated. METHODS: This work presents the development of two different anatomical models (young adult female and elderly male) with an ischemic stroke region of spherical volume 10 cm(3) or 50 cm(3) , using numerical models of the Virtual Population (ViP)...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28042984/transcranial-direct-current-stimulation-modulates-offline-visual-oscillatory-activity-a-magnetoencephalography-study
#19
Elizabeth Heinrichs-Graham, Timothy J McDermott, Mackenzie S Mills, Nathan M Coolidge, Tony W Wilson
Transcranial direct-current stimulation (tDCS) is a noninvasive neuromodulatory method that involves delivering low amplitude, direct current to specific regions of the brain. While a wealth of literature shows changes in behavior and cognition following tDCS administration, the underlying neuronal mechanisms remain largely unknown. Neuroimaging studies have generally used fMRI and shown only limited consensus to date, while the few electrophysiological studies have reported mostly null or counterintuitive findings...
December 7, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28039551/single-session-transcranial-direct-current-stimulation-induces-enduring-enhancement-of-visual-processing-speed-in-patients-with-major-depression
#20
Nadine Gögler, Lina Willacker, Johanna Funk, Wolfgang Strube, Simon Langgartner, Natan Napiórkowski, Alkomiet Hasan, Kathrin Finke
Attentional deficits are considered key cognitive symptoms in major depressive disorder (MDD) arising from abnormal activation patterns within dorsolateral prefrontal cortex (dlPFC) alertness networks. Altering these activity patterns with transcranial direct current stimulation (tDCS) might thus ameliorate alertness-dependent cognitive deficits in MDD patients. In a double-blind, randomized, sham-controlled study, we investigated the effect of a single session of anodal tDCS (2 mA) applied to the left dlPFC on different parameters of visual attention based on Bundesen's theory of visual attention (Psychol Rev 97(4):523-547, 1990) in a group of 20 patients with MDD and a control group of 20 healthy participants...
December 30, 2016: European Archives of Psychiatry and Clinical Neuroscience
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