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TDCS COGNITION

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https://www.readbyqxmd.com/read/27912107/limits-to-tdcs-effects-in-language-failures-to-modulate-word-production-in-healthy-participants-with-frontal-or-temporal-tdcs
#1
Samuel J Westwood, Andrew Olson, R Chris Miall, Raffaele Nappo, Cristina Romani
Transcranial direct current stimulation (tDCS) is a method of non-invasive brain stimulation widely used to modulate cognitive functions. Recent studies, however, suggests that effects are unreliable, small and often non-significant at least when stimulation is applied in a single session to healthy individuals. We examined the effects of frontal and temporal lobe anodal tDCS on naming and reading tasks and considered possible interactions with linguistic activation and selection mechanisms as well as possible interactions with item difficulty and participant individual variability...
November 3, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27903289/changes-in-cerebral-glucose-metabolism-after-3%C3%A2-weeks-of-noninvasive-electrical-stimulation-of-mild-cognitive-impairment-patients
#2
Kyongsik Yun, In-Uk Song, Yong-An Chung
BACKGROUND: Mild cognitive impairment (MCI) is a syndrome that disrupts an individual's cognitive function but preserves activities of daily living. MCI is thought to be a prodromal stage of dementia, which disrupts patients' daily lives and causes severe cognitive dysfunction. Although extensive clinical trials have attempted to slow or stop the MCI to dementia conversion, the results have been largely unsuccessful. The purpose of this study was to determine whether noninvasive electrical stimulation of MCI changes glucose metabolism...
December 1, 2016: Alzheimer's Research & Therapy
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
#3
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/27899889/anodal-tdcs-to-right-dorsolateral-prefrontal-cortex-facilitates-performance-for-novice-jazz-improvisers-but-hinders-experts
#4
David S Rosen, Brian Erickson, Youngmoo E Kim, Daniel Mirman, Roy H Hamilton, John Kounios
Research on creative cognition reveals a fundamental disagreement about the nature of creative thought, specifically, whether it is primarily based on automatic, associative (Type-1) or executive, controlled (Type-2) processes. We hypothesized that Type-1 and Type-2 processes make differential contributions to creative production that depend on domain expertise. We tested this hypothesis with jazz pianists whose expertise was indexed by the number of public performances given. Previous fMRI studies of musical improvisation have reported that domain expertise is characterized by deactivation of the right-dorsolateral prefrontal cortex (r-DLPFC), a brain area associated with Type-2 executive processing...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27897670/boosting-cognition-effects-of-multiple-session-transcranial-direct-current-stimulation-on-working-memory
#5
Lotte J Talsma, Henryk A Kroese, Heleen A Slagter
Transcranial direct current stimulation (tDCS) is a promising tool for neurocognitive enhancement. Several studies have shown that just a single session of tDCS over the left dorsolateral pFC (lDLPFC) can improve the core cognitive function of working memory (WM) in healthy adults. Yet, recent studies combining multiple sessions of anodal tDCS over lDLPFC with verbal WM training did not observe additional benefits of tDCS in subsequent stimulation sessions nor transfer of benefits to novel WM tasks posttraining...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27872369/the-impact-of-cerebellar-transcranial-direct-current-stimulation-tdcs-on-learning-fine-motor-sequences
#6
Renee E Shimizu, Allan D Wu, Jasmine K Samra, Barbara J Knowlton
The cerebellum has been shown to be important for skill learning, including the learning of motor sequences. We investigated whether cerebellar transcranial direct current stimulation (tDCS) would enhance learning of fine motor sequences. Because the ability to generalize or transfer to novel task variations or circumstances is a crucial goal of real world training, we also examined the effect of tDCS on performance of novel sequences after training. In Study 1, participants received either anodal, cathodal or sham stimulation while simultaneously practising three eight-element key press sequences in a non-repeating, interleaved order...
January 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27859982/transcranial-direct-current-stimulation-effects-on-neural-processing-in-post-stroke-aphasia
#7
Robert Darkow, Andrew Martin, Anna Würtz, Agnes Flöel, Marcus Meinzer
Non-invasive transcranial direct current stimulation (tDCS) can enhance recovery after stroke. However, fundamental knowledge about how tDCS impacts neural processing in the lesioned human brain is currently lacking. In the present study, it was investigated how tDCS modulates brain function in patients with post-stroke language impairment (aphasia). In a cross-over, randomized trial, patients named pictures of common objects during functional magnetic resonance imaging (fMRI). Concurrently, excitatory (anodal-) or sham-tDCS (1 mA, 20 min, or 30 s, respectively) was administered to the left primary motor cortex, a montage with demonstrated potential to improve aphasic language...
November 11, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27858126/transcranial-direct-current-stimulation-tdcs-of-the-inferior-frontal-cortex-affects-the-social-scaling-of-extrapersonal-space-depending-on-perspective-taking-ability
#8
Chiara Fini, Lara Bardi, Alessandra Epifanio, Giorgia Committeri, Agnes Moors, Marcel Brass
When we have to judge the distance between another person and an object (social condition), we judge this distance as being smaller compared to judging the distance between two objects (nonsocial condition). It has been suggested that this compression is mediated by the attribution of a motor potential to the reference frame (other person vs. object). In order to explore the neural basis of this effect, we investigated whether the modulation of activity in the inferior frontal cortex (IFC) of the left hemisphere (recruited during visuospatial processes with a social component) changes the way we categorize space in a social compared with a nonsocial condition...
November 17, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27830161/astrocytic-calcium-activation-in-a-mouse-model-of-tdcs-extended-discussion
#9
Hiromu Monai, Hajime Hirase
Transcranial direct current stimulation (tDCS) has been reported to be effective for alleviation of neuropsychiatric and neurological conditions as well as enhancement of memory and cognition. Despite the positive effects of tDCS in humans, its mechanism of action remains poorly understood. Recently, we reported that astrocytes, a major glial cell type in the brain, show an increase in intracellular Ca(2+) levels during tDCS in the cerebral cortex of the awake mouse. This tDCS-induced elevation in astrocytic Ca(2+) has subsequently been demonstrated to be important for cortical plasticity...
2016: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/27830094/adaptive-plasticity-in-the-healthy-language-network-implications-for-language-recovery-after-stroke
#10
REVIEW
Gesa Hartwigsen
Across the last three decades, the application of noninvasive brain stimulation (NIBS) has substantially increased the current knowledge of the brain's potential to undergo rapid short-term reorganization on the systems level. A large number of studies applied transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) in the healthy brain to probe the functional relevance and interaction of specific areas for different cognitive processes. NIBS is also increasingly being used to induce adaptive plasticity in motor and cognitive networks and shape cognitive functions...
2016: Neural Plasticity
https://www.readbyqxmd.com/read/27822047/a-pilot-study-of-cognitive-training-with-and-without-transcranial-direct-current-stimulation-to-improve-cognition-in-older-persons-with-hiv-related-cognitive-impairment
#11
Raymond L Ownby, Amarilis Acevedo
BACKGROUND: In spite of treatment advances, HIV infection is associated with cognitive deficits. This is even more important as many persons with HIV infection age and experience age-related cognitive impairments. Both computer-based cognitive training and transcranial direct current stimulation (tDCS) have shown promise as interventions to improve cognitive function. In this study, we investigate the acceptability and efficacy of cognitive training with and without tDCS in older persons with HIV...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27804033/using-transcranial-direct-current-stimulation-tdcs-to-understand-cognitive-processing
#12
REVIEW
Robert M G Reinhart, Josh D Cosman, Keisuke Fukuda, Geoffrey F Woodman
Noninvasive brain stimulation methods are becoming increasingly common tools in the kit of the cognitive scientist. In particular, transcranial direct-current stimulation (tDCS) is showing great promise as a tool to causally manipulate the brain and understand how information is processed. The popularity of this method of brain stimulation is based on the fact that it is safe, inexpensive, its effects are long lasting, and you can increase the likelihood that neurons will fire near one electrode and decrease the likelihood that neurons will fire near another...
November 1, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27790791/a-clinical-trial-with-combined-transcranial-direct-current-stimulation-and-alcohol-approach-bias-retraining
#13
Tess E den Uyl, Thomas E Gladwin, Mike Rinck, Johannes Lindenmeyer, Reinout W Wiers
Two studies showed an improvement in clinical outcomes after alcohol approach bias retraining, a form of Cognitive Bias Modification (CBM). We investigated whether transcranial direct current stimulation (tDCS) could enhance effects of CBM. TDCS is a neuromodulation technique that can increase neuroplasticity and has previously been found to reduce craving. One hundred alcohol-dependent inpatients (91 used for analysis) were randomized into three experimental groups in a double-blind parallel design. The experimental group received four sessions of CBM while receiving 2 mA of anodal tDCS over the dorsolateral prefrontal cortex (DLPFC)...
October 27, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27789261/transcranial-direct-current-stimulation-of-superior-medial-frontal-cortex-disrupts-response-selection-during-proactive-response-inhibition
#14
Angela D Bender, Hannah L Filmer, Paul E Dux
Cognitive control is a vital executive process that is involved in selecting, generating, and maintaining appropriate, goal-directed behaviour. One operation that draws heavily on this resource is the mapping of sensory information to appropriate motor responses (i.e., response selection). Recently, a transcranial direct current stimulation (tDCS) study demonstrated that the left posterior lateral prefrontal cortex (pLPFC) is casually involved in response selection and response selection training. Correlational brain imaging evidence has also implicated the superior medial frontal cortex (SMFC) in response selection, and there is causal evidence that this brain region is involved in the proactive modulation of response tendencies when occasional stopping is required (response inhibition)...
October 24, 2016: NeuroImage
https://www.readbyqxmd.com/read/27779192/tdcs-over-left-m1-or-dlpfc-does-not-improve-learning-of-a-bimanual-coordination-task
#15
Kathleen Vancleef, Raf Meesen, Stephan P Swinnen, Hakuei Fujiyama
Previously, transcranial direct current stimulation (tDCS) over the primary motor cortex (M1) has resulted in improved performance in simple motor tasks. For a complex bimanual movement, studies using functional magnetic resonance imaging and transcranial magnetic stimulation indicated the involvement of the left dorsolateral prefrontal cortex (DLPFC) as well as left M1. Here we investigated the relative effect of up-regulating the cortical function in left DLPFC and left M1 with tDCS. Participants practised a complex bimanual task over four days while receiving either of five stimulation protocols: anodal tDCS applied over M1, anodal tDCS over DLPFC, sham tDCS over M1, sham tDCS over DLPFC, or no stimulation...
October 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27776293/converging-effects-of-diverse-treatment-modalities-on-frontal-cortex-in-schizophrenia-a-review-of-longitudinal-functional-magnetic-resonance-imaging-studies
#16
REVIEW
Ayse Sakalli Kani, Ann K Shinn, Kathryn E Lewandowski, Dost Öngür
OBJECTIVES: A variety of treatment options exist for schizophrenia, but the effects of these treatments on brain function are not clearly understood. To facilitate the development of more effective treatment strategies, it is important to identify how brain function in schizophrenia patients is affected by the diverse therapeutic approaches that are currently available. The aim of the present article is to systematically review the evidence for functional brain changes associated with different treatment modalities for schizophrenia...
January 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/27766351/cerebellar-tdcs-does-not-improve-performance-in-probabilistic-classification-learning
#17
N Seyed Majidi, M C Verhage, O Donchin, P Holland, M A Frens, J N van der Geest
In this study, the role of the cerebellum in a cognitive learning task using transcranial direct current stimulation (tDCS) was investigated. Using a weather prediction task, subjects had to learn the probabilistic associations between a stimulus (a combination of cards) and an outcome (sun or rain). This task is a variant of a probabilistic classification learning task, for which it has been reported that prefrontal tDCS enhances performance. Using a between-subject design, all 30 subjects learned to improve their performance with increasing accuracies and shortened response times over a series of 500 trials...
October 20, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27756695/enhanced-working-memory-performance-via-transcranial-direct-current-stimulation-the-possibility-of-near-and-far-transfer
#18
Michael C Trumbo, Laura E Matzen, Brian A Coffman, Michael A Hunter, Aaron P Jones, Charles S H Robinson, Vincent P Clark
Although working memory (WM) training programs consistently result in improvement on the trained task, benefit is typically short-lived and extends only to tasks very similar to the trained task (i.e., near transfer). It is possible that pairing repeated performance of a WM task with brain stimulation encourages plasticity in brain networks involved in WM task performance, thereby improving the training benefit. In the current study, transcranial direct current stimulation (tDCS) was paired with performance of a WM task (n-back)...
October 15, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27756567/study-design-and-methodology-for-a-multicentre-randomised-controlled-trial-of-transcranial-direct-current-stimulation-as-a-treatment-for-unipolar-and-bipolar-depression
#19
Angelo Alonzo, Scott Aaronson, Marom Bikson, Mustafa Husain, Sarah Lisanby, Donel Martin, Shawn M McClintock, William M McDonald, John O'Reardon, Zeinab Esmailpoor, Colleen Loo
Transcranial Direct Current Stimulation (tDCS) is a new, non-invasive neuromodulation approach for treating depression that has shown promising efficacy. The aim of this trial was to conduct the first international, multicentre randomised controlled trial of tDCS as a treatment for unipolar and bipolar depression. The study recruited 120 participants across 6 sites in the USA and Australia. Participants received active or sham tDCS (2.5mA, 20 sessions of 30min duration over 4weeks), followed by a 4-week open label active treatment phase and a 4-week taper phase...
October 15, 2016: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/27745724/-noninvasive-cerebral-stimulation-for-treatment-of-adhd-a-review-of-the-literature
#20
L Brandejsky, J-A Micoulaud Franchi, R Lopez, S Bioulac, D Da Fonseca, C Daudet, L Boyer, R Richieri, C Lançon
OBJECTIVES: The aim of this review is to summarize the available data in the literature about the therapeutic applications of transcranial magnetic stimulation and transcranial direct current stimulation in attention-deficit hyperactivity disorder (ADHD). METHOD: The scientific literature search of international articles was performed in February 2016 using the PubMed electronic database. The following MeSH terms were employed: "attention-deficit disorder with hyperactivity" AND "transcranial magnetic stimulation", "attention-deficit disorder with hyperactivity" AND "transcranial direct current stimulation"...
October 10, 2016: L'Encéphale
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