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TDCS and cognition

Daria Antonenko, Dayana Hayek, Justus Netzband, Ulrike Grittner, Agnes Flöel
Transcranial direct current stimulation (tDCS) augments training-induced cognitive gains, an issue of particular relevance in the aging population. However, negative outcomes have been reported as well, and few studies so far have evaluated the impact of tDCS on episodic memory formation in elderly cohorts. The heterogeneity of previous findings highlights the importance of elucidating neuronal underpinnings of tDCS-induced modulations, and of determining individual predictors of a positive response. In the present study, we aimed to modulate episodic memory formation in 34 older adults with anodal tDCS (1 mA, 20 min) over left temporoparietal cortex...
February 19, 2019: Scientific Reports
Yufeng Ke, Ningci Wang, Jiale Du, Linghan Kong, Shuang Liu, Minpeng Xu, Xingwei An, Dong Ming
Working memory (WM) is a fundamental cognitive ability to support complex thought, but it is limited in capacity. WM training has shown the potential benefit for those in need of a higher WM ability. Many studies have shown the potential of transcranial direct current stimulation (tDCS) to transiently enhance WM performance by delivering a low current to the brain cortex of interest, via electrodes on the scalp. tDCS has also been revealed as a promising intervention to augment WM training in a few studies...
2019: Frontiers in Human Neuroscience
David C Houghton, Thomas W Uhde, Jeffrey J Borckardt, Bernadette M Cortese
OBJECTIVE: Enhanced odor sensitivity is a phenomenon that potentially underlies conditions such as multiple chemical sensitivity (MCS). Currently, there are no treatments that have been shown to effectively decrease odor sensitivity. Given similarities of odor hypersensitivity/MCS to pain sensitization disorders such as fibromyalgia, there may be a potential for interventions that improve pain tolerance to modulate odor sensitivity. METHODS: This exploratory study randomized 72 healthy community adult volunteers to receive one of six treatments in between two assessments of thermal pain tolerance and odor threshold...
February 12, 2019: Psychosomatic Medicine
Venkataram Shivakumar, Damodharan Dinakaran, Janardhanan C Narayanaswamy, Ganesan Venkatasubramanian
Obsessive-compulsive disorder (OCD) is a complex neuropsychiatric disorder with a chronic course, contributing to significant socio-occupational dysfunction. Forty percent of patients remain treatment refractive despite mainstream treatment options such as serotonin-reuptake inhibitors and cognitive behavior therapy. Noninvasive brain stimulation approaches such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) have piqued interest as add-on treatment options in OCD...
January 2019: Indian Journal of Psychiatry
Wen-Juan Yang, Hui-Zhong Wen, Lu-Xu Zhou, Yin-Pei Luo, Wen-Sheng Hou, Wang Xing, Xue-Long Tian
Repetitive anodal transcranial direct current stimulation (tDCS) in a rat model of Alzheimer's disease (AD) has been shown to have distinct neuroprotective effects. Moreover, the effects of anodal tDCS not only occur during the stimulation but also persist after the stimulation has ended (after-effects). Here, the duration of the after-effects induced by repetitive anodal tDCS was investigated based on our previous studies. Adult male Sprague-Dawley rats were divided into three groups: a sham group, a β-amyloid (Aβ) group (AD group) and a stimulation group (ATD group)...
February 5, 2019: Neurobiology of Learning and Memory
Alberto Cucca, Kush Sharma, Shashank Agarwal, Andrew Seth Feigin, Milton Cesar Biagioni
Transcranial direct current stimulation (tDCS) is a modality of non-invasive brain stimulation involving the application of low amplitude direct current via surface electrodes on the scalp. tDCS has been studied in healthy populations and in multiple brain disorders and has the potential to be a treatment for several neuropsychiatric conditions by virtue of its capability of influencing cognitive, motor and behavioral processes. tDCS is a generally safe technique when performed within standardized protocols in research or clinical settings...
January 31, 2019: Journal of Neuroengineering and Rehabilitation
Nico Adelhöfer, Moritz Mückschel, Benjamin Teufert, Tjalf Ziemssen, Christian Beste
Medial and superior frontal theta oscillations are important for response inhibition. The norepinephrine (NE) system has been shown to modulate these oscillations possibly via gain control mechanisms, which depend on the modulation of neuron membrane potentials. Because the latter are also modulated by tDCS, the interrelation of tDCS and NE effects on superior frontal theta band activity needs investigation. We test the hypothesis that anodal tDCS affects modulatory effects of the NE system on theta band activity during inhibitory control in superior frontal regions...
January 30, 2019: Brain Structure & Function
Vanteemar S Sreeraj, Venkataram Shivakumar, Anushree Bose, Purohit N Abhiram, Sri Mahavir Agarwal, Harleen Chhabra, Janardhanan C Narayanaswamy, Ganesan Venkatasubramanian
Transcranial direct current stimulation (tDCS) is a novel brain stimulation technique which has kindled hope in alleviating motor, language as well as cognitive deficits in neuronal injury. Current case report describes application of tDCS in two phases using two different protocols in a patient with hypoxic injury. In the first phase anodal stimulation of dorsolateral prefrontal cortex improved the language fluency. Subsequently, after 6 months second phase application of anodal stimulation over posterior parietal region targeted arithmetic and working memory deficits...
February 28, 2019: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
Elena R Stein, Benjamin C Gibson, Victoria R Votaw, Adam D Wilson, Vincent P Clark, Katie Witkiewitz
With expanding knowledge of how neural circuitry is disrupted in substance use disorders (SUD), non-invasive brain stimulation (NIBS) techniques have emerged as potential strategies to directly modulate those neural circuits. There is some evidence supporting the two most common forms of NIBS, transcranial direct current stimulation (tDCS) and transcranial magnetic stimulation (TMS), in the treatment of SUD. Yet results of recent studies have been mixed and critical methodological issues must be addressed before strong conclusions can be drawn...
December 19, 2018: Current Opinion in Psychology
Nya Mehnwolo Boayue, Gábor Csifcsák, Per Aslaksen, Zsolt Turi, Andrea Antal, Josephine Groot, Guy E Hawkins, Birte Forstmann, Alexander Opitz, Axel Thielscher, Matthias Mittner
Transcranial direct current stimulation (tDCS) has been proposed to be able to modulate different cognitive functions. However, recent meta-analyses conclude that its efficacy is still in question. Recently, an increase in subjects' propensity to mind-wander has been reported as a consequence of anodal stimulation of the left dorsolateral prefrontal cortex(Axelrod et al.,2015). In addition, an independent group found a decrease in mind wandering after cathodal stimulation of the same region. These findings seem to indicate that high-level cognitive processes such as mind wandering can reliably be influenced by non-invasive brain stimulation...
January 24, 2019: European Journal of Neuroscience
Peter H Donaldson, Melissa Kirkovski, Nicole J Rinehart, Peter G Enticott
Prior studies have demonstrated that aspects of social cognition can be modulated via temporoparietal junction (TPJ) transcranial direct current stimulation (tDCS). However, this technique lacks focality and electrophysiological effects or correlates are rarely examined. The present study investigated whether anodal and/or cathodal high-definition tDCS (HD-tDCS) would influence facial emotion processing performance relative to sham stimulation, and whether task performance changes were related to neurophysiological changes...
January 22, 2019: Social Neuroscience
Gali Shilo, Michal Lavidor
Transcranial direct current stimulation (tDCS) of 1 mA for 13 min was reported to create a linear inter-dependency between the intensity and duration of the current and the effects of the stimulation. tDCS on the primary motor cortex (M1) has been shown to have an effect on both motor-evoked potential (MEP) and motor learning. However, recent findings have shown that the known linear effect is invalid in a 2 mA stimulation for 20 min, where cathodal stimulation led to excitability, rather than inhibition, as measured by MEP changes...
January 19, 2019: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Greg J Elder, Sean J Colloby, Michael J Firbank, Ian G McKeith, John-Paul Taylor
BACKGROUND: Complex visual hallucinations are common in Lewy body dementia (LBD) and can cause significant patient and caregiver distress. Current treatments are primarily pharmacological in nature and have limited efficacy and associated side effects. The objective of this study was to assess the effects of consecutive sessions of transcranial direct current stimulation (tDCS) on visual hallucination frequency and severity in LBD, at short-term and long-term follow-up stages. METHODS: The study was a randomised, double-blind, placebo-controlled trial involving 40 participants with LBD (Mage  = 75...
January 18, 2019: Alzheimer's Research & Therapy
Shameka L Cody, Pariya L Fazeli, Michael Crowe, Mirjam-Colette Kempf, Linda Moneyham, Despina Stavrinos, David E Vance, Karen Heaton
Some older adults with human immunodeficiency virus (HIV) experience poor sleep which can worsen cognition. Transcranial direct current stimulation (tDCS) and cognitive training have improved sleep and cognition in studies of older adults; yet, their combined influence is unknown in adults with HIV. Older adults with HIV (n = 33) and without HIV (n = 33) were randomized to receive 10 one-hour sessions of speed of processing (SOP) training with tDCS or sham tDCS over approximately 5 weeks. tDCS with SOP training did not improve sleep...
January 17, 2019: Applied Neuropsychology. Adult
Clara Fonteneau, Marine Mondino, Martijn Arns, Chris Baeken, Marom Bikson, Andre R Brunoni, Matthew J Burke, Tuomas Neuvonen, Frank Padberg, Alvaro Pascual-Leone, Emmanuel Poulet, Giulio Ruffini, Emiliano Santarnecchi, Anne Sauvaget, Klaus Schellhorn, Marie-Françoise Suaud-Chagny, Ulrich Palm, Jérome Brunelin
Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique increasingly used to modulate neural activity in the living brain. In order to establish the neurophysiological, cognitive or clinical effects of tDCS, most studies compare the effects of active tDCS to those observed with a sham tDCS intervention. In most cases, sham tDCS consists in delivering an active stimulation for a few seconds to mimic the sensations observed with active tDCS and keep participants blind to the intervention...
January 2, 2019: Brain Stimulation
Chuan-Chia Chang, Yu-Chen Kao, Che-Yi Chao, Hsin-An Chang
No studies have examined the effects of fronto-temporal transcranial direct current stimulation (tDCS) on cognitive insight and neurocognitive function in schizophrenia patients and the dynamic interplay between tDCS-induced changes in these two outcomes. In this double-blind, randomized, sham-controlled study, we investigated the effects of fronto-temporal tDCS [anode corresponding to left dorsolateral prefrontal cortex and cathode to left temporo-parietal junction; 2-mA, twice-daily sessions for 5 days] on illness severity, psychosocial functioning, cognitive insight and neurocognitive function in schizophrenia patients (N = 60)...
January 8, 2019: Schizophrenia Research
Mauro Adenzato, Rosa Manenti, Ivan Enrici, Elena Gobbi, Michela Brambilla, Antonella Alberici, Maria Sofia Cotelli, Alessandro Padovani, Barbara Borroni, Maria Cotelli
Background: Parkinson's Disease (PD) with mild cognitive impairment (MCI) (PD-MCI) represents one of the most dreaded complications for patients with PD and is associated with a higher risk of developing dementia. Although transcranial direct current stimulation (tDCS) has been demonstrated to improve motor and non-motor symptoms in PD, to date, no study has investigated the effects of tDCS on Theory of Mind (ToM), i.e., the ability to understand and predict other people's behaviours, in PD-MCI...
2019: Translational Neurodegeneration
M R L Emonson, P B Fitzgerald, N C Rogasch, K E Hoy
Transcranial direct current stimulation (tDCS) has been investigated as a way to improve motor and cognitive functioning, with largely variable results. Currently, relatively little is known about the neurobiological effects, and possible drivers of variability, in either healthy or clinical populations. Therefore, this study aimed to characterise the neurobiological effects to tDCS in younger adults, older adults and adults with mild cognitive impairment (MCI), and their relationship to cognitive performance...
January 6, 2019: Neuropsychologia
Sun-Young Moon, Minah Kim, Wu Jeong Hwang, Tae Young Lee, Jun Soo Kwon
Transcranial direct current stimulation (tDCS) exerts pro-cognitive effects in various populations. We evaluated the effect of tDCS on cognitive performance and its electrophysiological correlates in schizophrenia patients. Ten participants received 10 sessions of tDCS and performed cognitive performance tasks; error-related negativity and correct response negativity (CRN) were measured before and after tDCS. Verbal performance was improved by tDCS and strongly correlated with a reduced CRN amplitude. Despite the lack of sham control design and possible practice effects of cognitive tasks, we might conclude that CRN could be a modifiable electrophysiological correlate of cognitive improvement by tDCS...
December 31, 2018: Psychiatry research. Neuroimaging
Aron T Hill, Nigel C Rogasch, Paul B Fitzgerald, Kate E Hoy
Transcranial direct current stimulation (tDCS) provides a means of non-invasively inducing plasticity-related changes in neural circuits in vivo and is experiencing increasing use as a potential tool for modulating brain function. There is growing evidence that tDCS-related outcomes are likely to be influenced by an individual's brain state at the time of stimulation, i.e., effects show a degree of 'state-dependency'. However, few studies have examined the behavioural and physiological impact of state-dependency within cognitively salient brain regions...
December 7, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
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