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TDCS and cognition

Elena M Marron, Raquel Viejo-Sobera, Guillem Cuatrecasas, Diego Redolar-Ripoll, Pilar García Lorda, Abhishek Datta, Marom Bikson, Greta Magerowski, Miguel Alonso-Alonso
Human neuroimaging studies have consistently reported changes in cerebellar function and integrity in association with obesity. To date, however, the nature of this link has not been studied directly. Emerging evidence suggests a role for the cerebellum in higher cognitive functions through reciprocal connections with the prefrontal cortex. The purpose of this exploratory study was to examine appetite changes associated with noninvasive prefronto-cerebellar neuromodulation in obesity. Totally, 12 subjects with class I obesity (mean body mass index 32...
December 11, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
Judy Luigjes, Rebecca Segrave, Niels de Joode, Martijn Figee, Damiaan Denys
It is important to find new treatments for addiction due to high relapse rates despite current interventions and due to expansion of the field with non-substance related addictive behaviors. Neuromodulation may provide a new type of treatment for addiction since it can directly target abnormalities in neurocircuits. We review literature on five neuromodulation techniques investigated for efficacy in substance related and behavioral addictions: transcranial direct current stimulation (tDCS), (repetitive) transcranial magnetic stimulation (rTMS), EEG, fMRI neurofeedback and deep brain stimulation (DBS) and additionally report on effects of these interventions on addiction-related cognitive processes...
December 7, 2018: Neuropsychology Review
Bryan Dobbs, Natalie Pawlak, Milton Biagioni, Shashank Agarwal, Michael Shaw, Giuseppina Pilloni, Marom Bikson, Abhishek Datta, Leigh Charvet
BACKGROUND: Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has been shown to improve common symptoms of neurological disorders like depressed mood, fatigue, motor deficits and cognitive dysfunction. tDCS requires daily treatment sessions in order to be effective. We developed a remotely supervised tDCS (RS-tDCS) protocol for participants with multiple sclerosis (MS) to increase accessibility of tDCS, reducing clinician, patient, and caregiver burden...
December 7, 2018: Journal of Neuroengineering and Rehabilitation
Fady Rachid
Obsessive-compulsive disorder (OCD) is a highly disabling psychiatric disorder characterized by recurrent obsessions and compulsions. It has a lifetime prevalence of 1-3% in the general population and commonly has a chronic course. First-line treatments consist of selective serotonin reuptake inhibitors and cognitive-behavioral therapy but up to 60% of patients respond partially or not at all to these treatments. This paper reviewed the literature on the safety and efficacy of transcranial direct current stimulation (tDCS) for the treatment of obsessive-compulsive disorder and discussed future directions for research and clinical application...
November 16, 2018: Psychiatry Research
Claire J Hanley, Andrea Tales
Transcranial direct current stimulation (tDCS) facilitates cognitive enhancement by directly increasing neuroplasticity, and has shown promising results as an external intervention to attenuate age-related cognitive decline. However, stimulation protocols have failed to account for age-associated changes in brain structure and the present literature omits investigation of attentional control, despite the occurrence of substantial inhibitory processing deficits with age. To provide new insight into the benefits of tDCS, the objective of this study was to develop an age-optimised stimulation protocol in which key parameters (amplitude, duration, and electrode configuration) were selected in accordance with knowledge of stimulation effects, specific to the ageing brain...
November 27, 2018: Experimental Gerontology
Mary Falcone, Leah Bernardo, E Paul Wileyto, Cheyenne Allenby, Anne Marie Burke, Roy Hamilton, Mario Cristancho, Rebecca L Ashare, James Loughead, Caryn Lerman
BACKGROUND: Transcranial direct current stimulation (tDCS) has been shown to improve measures of executive cognitive function and reduce cigarette consumption. Studies conducted to date have been small, and the results are mixed. METHODS: This randomized, double-blind, parallel arm clinical trial tested the effects of active anodal tDCS targeted to the left dorsolateral prefrontal cortex (versus sham) on 7-day smoking cessation in 106 treatment-seeking smokers. Participants received three sessions of sham (n = 35), 1 mA (n = 35), or 2 mA (n = 36) tDCS in the context of a validated smoking lapse paradigm then received brief smoking cessation counseling and completed a monitored quit attempt...
November 13, 2018: Drug and Alcohol Dependence
Xiaofei Niu, Jianbiao Li, Glenn J Browne, Dahui Li, Qian Cao, Xiaoli Liu, Guangrong Wang, Pengcheng Wang
Decision makers often follow other similarly-situated people in making decisions, creating a sequential decision-making context. Although rational behavior is often to make the same choice as previous decision makers, which can result in an information cascade, people may assign inappropriately higher weight to their own private information and discount public information about predecessors' choices. Recent findings suggest that overweighting private information may be associated with increased activities in the inferior frontal gyrus (IFG)...
November 27, 2018: Social Cognitive and Affective Neuroscience
Xiaoling Wu, Feifei Xu, Xingui Chen, Lu Wang, Wanling Huang, Ke Wan, Gong-Jun Ji, Guixian Xiao, Sheng Xu, Fengqiong Yu, Chunyan Zhu, Chunhua Xi, Kai Wang
Empathy, including cognitive and emotional empathy, refers to the ability to infer the mental states of others and to the capacity to share emotions. The neural mechanisms involved in empathy are complex and not yet fully understood, and previous studies have shown that both cognitive and emotional empathy are closely associated with the inferior frontal gyrus (IFG). In this study, we examined whether empathy can be modulated by high-definition transcranial direct current stimulation (HD-tDCS) of the right IFG...
2018: Frontiers in Human Neuroscience
Megan Boudewyn, Brooke M Roberts, Eda Mizrak, Charan Ranganath, Cameron S Carter
This study examined the effects of stimulation targeting dorsolateral prefrontal cortex (DLPFC) on behavioral and neural oscillatory markers of proactive cognitive control in healthy adults. We hypothesized that active stimulation targeting the DLPFC would enhance proactive control compared to sham, leading to changes in the pattern of error rates and gamma-band power on the Dot Pattern Expectancy (DPX) task. We recorded EEG while participants completed the DPX, after receiving either 20 minutes of active DLPFC stimulation at 2 mA or sham stimulation in a counterbalanced within-participants design...
November 22, 2018: Cognitive Neuroscience
Hussien Ahmed Shaker, Salah Abd Elmonem Sawan, Ebtesam Mohamed Fahmy, Rania Shehata Ismail, Shymaa Abd Elhamid Abd Elrahman
Background: Cognitive impairment after stroke is common and can cause disability with major impacts on quality of life and independence. Transcranial direct current stimulation may represent a promising tool for reconstitution of cognitive functions in stroke patients. Objectives: This study aimed to investigate the effect of transcranial direct current stimulation on cognitive functions in stroke patients. Patients and methods: Forty male stroke patients were included...
2018: The Egyptian journal of neurology, psychiatry and neurosurgery
Suellen Marinho Andrade, Eliane Araújo de Oliveira, Nelson Torro Alves, Ana Cristina Gomes Dos Santos, Camila Teresa Ponce Leon de Mendonça, Danielle Dorand Amorim Sampaio, Edyllaine Elidy Querino Cavalcante da Silva, Égina Karoline Gonçalves da Fonsêca, Evelyn Thais de Almeida Rodrigues, Gabriela Nayara Siqueira de Lima, Jamerson Carvalho, Jessyca Alves Silvestre da Silva, Manuella Toledo, Marine Raquel Diniz da Rosa, Marcia Queiroz de Carvalho Gomes, Melquisedek Monteiro de Oliveira, Moema Teixeira Maia Lemos, Nágylla Gomes Lima, Penha Inácio, Petra Maria da Cruz Ribeiro E Rodrigues, Rayssa Gabriela Dantas Ferreira, Renata Cavalcante, Renata Emanuela Lyra de Brito Aranha, Regina Neves, Rodrigo Marmo da Costa E Souza, Thainá Magalhães Portugal, Wanessa Kallyne Nascimento Martins, Vivian Pontes, Thiago Monteiro de Paiva Fernandes, Israel Contador, Bernardino Fernández-Calvo
Despite advances in the treatment of Alzheimer's disease (AD), there is currently no prospect of a cure, and evidence shows that multifactorial interventions can benefit patients. A promising therapeutic alternative is the use of transcranial direct current stimulation (tDCS) simultaneously with cognitive intervention. The combination of these non-pharmacological techniques is apparently a safe and accessible approach. This study protocol aims to compare the efficacy of tDCS and cognitive intervention in a double-blind, randomized and factorial clinical trial...
2018: Frontiers in Aging Neuroscience
Ahmet S Asan, Sinan Gok, Mesut Sahin
As a non-invasive brain stimulation technique, transcranial electrical stimulation (TES) and specifically the transcranial direct current stimulation (tDCS) has gained popularity in recent years for treatment of a wide variety of cognitive and neurological disorders. Recent studies have shown that TES can alter the motor cortex excitability. Animal studies to demonstrate the underlying mechanisms of TES are clearly lacking in literature. Clinical studies have agreed on the critical role of the current intensity and the montage of the electrodes for the treatment to be effective...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Mengjiao Hu, Fang Ji, Zhongkang Lu, Weimin Huang, Reza Khosrowabadi, Ling Zhao, Kai Keng Ang, Kok Soon Phua, Fatima Ali Nasrallah, Kai-Hsiang Chuang, Mary C Stephenson, John Totman, Xudong Jiang, Effie Chew, Cuntai Guan, Juan Zhou
Mapping the brain alterations post stroke and post intervention is important for rehabilitation therapy development. Previous work has shown changes in functional connectivity based on resting-state fMRI, structural connectivity derived from diffusion MRI and perfusion as a result of brain-computer interface-assisted motor imagery (MI-BCI) and transcranial direct current stimulation (tDCS) in upper-limb stroke rehabilitation. Besides functional connectivity, regional amplitude of local low-frequency fluctuations (ALFF) may provide complementary information on the underlying neural mechanism in disease...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Guo Dalong, Li Jiyuan, Zhang Ying, Zha Lei, Hou Yanhong, Shao Yongcong
Reductions in the alertness and information processing capacity of individuals due to sleep deprivation (SD) were previously thought to be related to dysfunction of the thalamocortical network. Previous studies have shown that transcranial direct current stimulation (tDCS) can restore vigilance and information processing after SD. However, the underlying neural mechanisms of this phenomenon remain unclear. The purpose of this study was to investigate the neurocognitive mechanisms of tDCS following SD, by comparing changes in the brain network, especially the thalamocortical network, after tDCS and sham stimulation following 24 h of SD...
November 14, 2018: Brain Imaging and Behavior
Laurence Dumont, Sofia El Mouderrib, Hugo Théoret
BACKGROUND: Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique commonly used to modulate cognitive functions; so-called "anodal" stimulation is considered to increase cortical excitability while "cathodal" is presumed to have the opposite result. Yet, a growing number of recent studies question the robustness of this polarity-dependent effect, namely because of the important inter-individual variability with regards to tDCS modulatory effects...
November 3, 2018: Restorative Neurology and Neuroscience
Paolo Riva, Andrea Manfrinati, Simona Sacchi, Alberto Pisoni, Leonor J Romero Lauro
Multiple cortical networks intervene in moral judgment, among which the dorsolateral prefrontal cortex (DLPFC) and the medial prefrontal structures (medial PFC) emerged as two major territories, which have been traditionally attributed, respectively, to cognitive control and affective reactions. However, some recent theoretical and empirical accounts disputed this dualistic approach to moral evaluation. In the present study, to further assess the functional contribution of the medial PFC in moral judgment, we modulated its cortical excitability by means of transcranial direct current stimulation (tDCS) and tracked the change in response to different types of moral dilemmas, including switch-like and footbridge-like moral dilemmas, with and without personal involvement...
November 8, 2018: Cognitive, Affective & Behavioral Neuroscience
Gaëlle Dumel, Marie-Eve Bourassa, Camille Charlebois-Plante, Martine Desjardins, Julien Doyon, Dave Saint-Amour, Louis De Beaumont
Healthy aging is associated with decline of motor function that can generate serious consequences on the quality of life and safety. Our studies aim to explore the 3-month effects of a 5-day multisession anodal transcranial direct current stimulation (a-tDCS) protocol applied over the primary motor cortex (M1) during motor sequence learning in elderly. The present sham-controlled aging study investigated whether tDCS-induced motor improvements previously observed 1 day after the intervention persist beyond 3 months...
2018: Frontiers in Aging Neuroscience
Bryant J Jongkees, Alexandra A Loseva, Fatemeh B Yavari, Michael A Nitsche, Lorenza S Colzato
Transcranial direct current stimulation (tDCS) can alter cortical excitability, neural plasticity and cognitive-behavioral performance, however its effects are known to vary across studies. A partial account of this variability relates to individual differences in dopamine function. Indeed, dopaminergic manipulations alter the physiological and cognitive-behavioral effects of tDCS, and gene polymorphisms related to dopamine have predicted individual response to online tDCS (i.e., stimulation overlapping with the critical task)...
November 7, 2018: European Journal of Neuroscience
Jonathan C Lee, Daniel L Kenney-Jung, Caren J Blacker, Deniz Doruk Camsari, Charles P Lewis
Research involving transcranial direct current stimulation (tDCS) in child and adolescent psychiatry is limited. Early, short-term studies have found tDCS to be safe and well-tolerated in youth with neurodevelopmental disorders (attention-deficit hyperactivity disorder, autism, learning disorders). Preliminary data suggest potential utility in symptom reduction and improving cognitive function. Further careful research considering implications for the developing brain is necessary.
January 2019: Child and Adolescent Psychiatric Clinics of North America
Daniel L Kenney-Jung, Caren J Blacker, Deniz Doruk Camsari, Jonathan C Lee, Charles P Lewis
Transcranial direct current stimulation (tDCS) involves the application of weak electric current to the scalp. tDCS may influence brain functioning through effects on cortical excitability, neural plasticity, and learning. Evidence in adults suggests promising therapeutic applications for depression, and the adverse effect profile is generally mild. Early research indicates complex interactions between tDCS and concurrent cognitive and motor tasks. Further investigation is warranted to understand how tDCS impacts processes relevant to psychiatric conditions...
January 2019: Child and Adolescent Psychiatric Clinics of North America
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