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https://www.readbyqxmd.com/read/29892215/transcranial-direct-current-stimulation-symptomatology-and-cognition-in-psychosis-a-qualitative-review
#1
REVIEW
Tina Gupta, Nicholas J Kelley, Andrea Pelletier-Baldelli, Vijay A Mittal
Schizophrenia is a chronic, debilitating condition that affects approximately 1% of the population. Individuals diagnosed with schizophrenia typically exhibit positive (e.g., hallucinations) and negative symptoms (e.g., anhedonia) and impairments in cognitive function. Given the limitations of antipsychotic medication and psychotherapy in fully treating psychosis symptomatology, there has been increasing interest in other interventions such as transcranial direct current stimulation (tDCS). tDCS is a non-invasive neuromodulation technique, that is safe, cost-effective, and widely accessible...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29885858/transcranial-direct-current-brain-stimulation-decreases-impulsivity-in-adhd
#2
Cheyenne Allenby, Mary Falcone, Leah Bernardo, E Paul Wileyto, Anthony Rostain, J Russell Ramsay, Caryn Lerman, James Loughead
BACKGROUND: Impulsivity is a core deficit in attention deficit hyperactivity disorder (ADHD). Transcranial direct current stimulation (tDCS) of the dorsolateral prefrontal cortex (DLPFC) has been shown to modulate cognitive control circuits and could enhance DLPFC activity, leading to improved impulse control in ADHD. OBJECTIVE: Hypothesis: We predicted 2.0 mA anodal stimulation (tDCS) versus sham stimulation applied over the left DLPFC would improve Conners Continuous Performance Task (CPT) scores...
April 23, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29877965/physiology-of-transcranial-direct-current-stimulation
#3
Charlotte J Stagg, Andrea Antal, Michael A Nitsche
Direct current stimulation is a neuromodulatory noninvasive brain stimulation tool, which was first introduced in animal and human experiments in the 1950s, and added to the standard arsenal of methods to alter brain physiology as well as psychological, motor, and behavioral processes and clinical symptoms in neurological and psychiatric diseases about 20 years ago. In contrast to other noninvasive brain stimulation tools, such as transcranial magnetic stimulation, it does not directly induce cerebral activity, but rather alters spontaneous brain activity and excitability by subthreshold modulation of neuronal membranes...
June 5, 2018: Journal of ECT
https://www.readbyqxmd.com/read/29877819/a-cmos-based-bidirectional-brain-machine-interface-system-with-integrated-fdnirs-and-tdcs-for-closed-loop-brain-stimulation
#4
Yun Miao, Valencia Joyner Koomson
A CMOS-based bidirectional brain machine interface system with on-chip frequency-domain near infrared spectroscopy (fdNIRS) and transcranial direct-current stimulation (tDCS) is designed to enable noninvasive closed-loop brain stimulation for neural disorders treatment and cognitive performance enhancement. The dual channel fdNIRS can continuously monitor absolute cerebral oxygenation during the entire tDCS process by measuring NIR light's attenuation and phase shift across brain tissue. Each fdNIRS channel provides 120 dBΩ transimpedance gain at 80 MHz with a power consumption of 30 mW while tolerating up to 8 pF input capacitance...
June 2018: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/29782510/individual-differences-in-learning-correlate-with-modulation-of-brain-activity-induced-by-transcranial-direct-current-stimulation
#5
Brian Falcone, Atsushi Wada, Raja Parasuraman, Daniel E Callan
Transcranial direct current stimulation (tDCS) has been shown to enhance cognitive performance on a variety of tasks. It is hypothesized that tDCS enhances performance by affecting task related cortical excitability changes in networks underlying or connected to the site of stimulation facilitating long term potentiation. However, many recent studies have called into question the reliability and efficacy of tDCS to induce modulatory changes in brain activity. In this study, our goal is to investigate the individual differences in tDCS induced modulatory effects on brain activity related to the degree of enhancement in performance, providing insight into this lack of reliability...
2018: PloS One
https://www.readbyqxmd.com/read/29780572/cognitive-training-and-transcranial-direct-current-stimulation-for-mild-cognitive-impairment-in-parkinson-s-disease-a-randomized-controlled-trial
#6
Blake J Lawrence, Natalie Gasson, Andrew R Johnson, Leon Booth, Andrea M Loftus
This study examined whether standard cognitive training, tailored cognitive training, transcranial direct current stimulation (tDCS), standard cognitive training + tDCS, or tailored cognitive training + tDCS improved cognitive function and functional outcomes in participants with PD and mild cognitive impairment (PD-MCI). Forty-two participants with PD-MCI were randomized to one of six groups: (1) standard cognitive training, (2) tailored cognitive training, (3) tDCS, (4) standard cognitive training + tDCS, (5) tailored cognitive training + tDCS, or (6) a control group...
2018: Parkinson's Disease
https://www.readbyqxmd.com/read/29759944/testing-assumptions-on-prefrontal-transcranial-direct-current-stimulation-comparison-of-electrode-montages-using-multimodal-fmri
#7
Jana Wörsching, Frank Padberg, Stephan Goerigk, Irmgard Heinz, Christine Bauer, Christian Plewnia, Alkomiet Hasan, Birgit Ertl-Wagner, Daniel Keeser
BACKGROUND: Transcranial direct current stimulation (tDCS) of the prefrontal cortex (PFC) has been widely applied in cognitive neurosciences and advocated as a therapeutic intervention, e.g. in major depressive disorder. Although several targets and protocols have been suggested, comparative studies of tDCS parameters, particularly electrode montages and their cortical targets, are still lacking. OBJECTIVE: This study investigated a priori hypotheses on specific effects of prefrontal-tDCS montages by using multimodal functional magnetic resonance imaging (fMRI) in healthy participants...
May 4, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29754106/the-effect-of-transcranial-direct-current-stimulation-on-psychotic-symptoms-of-schizophrenia-is-associated-with-oxy-hemoglobin-concentrations-in-the-brain-as-measured-by-near-infrared-spectroscopy-a-pilot-study
#8
Zui Narita, Takamasa Noda, Shiori Setoyama, Kazuki Sueyoshi, Takuma Inagawa, Tomiki Sumiyoshi
Transcranial direct current stimulation (tDCS) has been shown to be effective in treating some of the symptoms of schizophrenia. In the current study, we sought to determine whether oxy-hemoglobin ([oxy-Hb]), measured by near-infrared spectroscopy (NIRS), is associated with effects of transcranial direct current stimulation (tDCS) on psychotic symptoms of schizophrenia. Twenty-six patients underwent tDCS (2 mA × 20 min) two times per day for five consecutive days. The anodal electrode was placed over the left dorsolateral prefrontal cortex while the cathodal electrode was placed over the right supraorbital region...
May 8, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29750977/high-definition-transcranial-direct-current-stimulation-changes-older-adults-subjective-sleep-and-corresponding-resting-state-functional-connectivity
#9
Jing Sheng, Chao Xie, Dong-Qiong Fan, Xu Lei, Jing Yu
With advanced age, older adults show functional deterioration in sleep. Transcranial direct current stimulation (tDCS), a noninvasive brain stimulation, modulates individuals' behavioral performance in various cognitive domains. However, the modulation effect and neural mechanisms of tDCS on sleep, especially for the elderly population are not clear. Here, we aimed to investigate whether high-definition transcranial direct current stimulation (HD-tDCS) could modulate community-dwelling older adults' subjective sleep and whether these potential improvements are associated with the large-scale brain activity alterations recorded by functional magnetic resonance imaging...
May 8, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29736192/the-effects-of-transcranial-direct-current-stimulation-on-the-cognitive-functions-in-older-adults-with-mild-cognitive-impairment-a-pilot-study
#10
Pablo Cruz Gonzalez, Kenneth N K Fong, Ted Brown
Objective: The aim of this pilot study was to investigate whether the use of anodal transcranial direct current stimulation (tDCS) on the left dorsolateral prefrontal cortex could boost the effects of a cognitive stimulation (CS) programme using a tablet on five older adults with mild cognitive impairment (MCI). Method: A single-subject study of A-B-C-A design was used. After the baseline with the administration of CS (phase A), a sham treatment with CS was applied (B)...
2018: Behavioural Neurology
https://www.readbyqxmd.com/read/29734768/transcranial-direct-current-stimulation-tdcs-a-promising-treatment-for-major-depressive-disorder
#11
REVIEW
Djamila Bennabi, Emmanuel Haffen
Background: Transcranial direct current stimulation (tDCS) opens new perspectives in the treatment of major depressive disorder (MDD), because of its ability to modulate cortical excitability and induce long-lasting effects. The aim of this review is to summarize the current status of knowledge regarding tDCS application in MDD. Methods: In this review, we searched for articles published in PubMed/MEDLINE from the earliest available date to February 2018 that explored clinical and cognitive effects of tDCS in MDD...
May 6, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29734347/single-transcranial-direct-current-stimulation-in-schizophrenia-randomized-cross-over-study-of-neurocognition-social-cognition-erps-and-side-effects
#12
Yuri Rassovsky, Walter Dunn, Jonathan K Wynn, Allan D Wu, Marco Iacoboni, Gerhard Hellemann, Michael F Green
Over the last decades, the treatment of schizophrenia has shifted fundamentally from a focus on symptom reduction to a focus on recovery and improving aspects of functioning. In this study, we examined the effect of transcranial direct current stimulation (tDCS) on social cognitive and nonsocial neurocognitive functions, as well as on electroencephalogram (EEG) measures, in individuals with schizophrenia. Thirty-seven individuals with schizophrenia were administered one of three different tDCS conditions (cathodal, anodal, and sham) per visit over the course of three visits, with approximately one week between each visit...
2018: PloS One
https://www.readbyqxmd.com/read/29725288/no-change-in-social-decision-making-following-transcranial-direct-current-stimulation-of-the-right-temporoparietal-junction
#13
Laura F Blair-West, Kate E Hoy, Phillip J Hall, Paul B Fitzgerald, Bernadette M Fitzgibbon
The right temporoparietal junction (rTPJ) is thought to play an important role in social cognition and pro-social decision-making. One way to explore this link is through the use of transcranial direct current stimulation (tDCS), a non-invasive brain stimulation method that is able to modulate cortical activity. The aim of this research was therefore to determine whether anodal tDCS to the rTPJ altered response to a social decision-making task. In this study, 34 healthy volunteers participated in a single-center, double-blinded, sham-controlled crossover design...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29713261/transcranial-direct-current-stimulation-tdcs-can-modulate-eeg-complexity-of-children-with-autism-spectrum-disorder
#14
Jiannan Kang, Erjuan Cai, Junxia Han, Zhen Tong, Xin Li, Estate M Sokhadze, Manuel F Casanova, Gaoxiang Ouyang, Xiaoli Li
Autism spectrum disorder (ASD) is a heterogeneous neurodevelopmental disorder which affects the developmental trajectory in several behavioral domains, including impairments of social communication, cognitive and language abilities. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique, and it was used for modulating the brain disorders. In this paper, we enrolled 13 ASD children (11 males and 2 females; mean ± SD age: 6.5 ± 1.7 years) to participate in our trial. Each patient received 10 treatments over the dorsolateral prefrontal cortex (DLPFC) once every 2 days...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29688392/challenge-to-unity-relationship-between-hemispheric-asymmetry-of-the-default-mode-network-and-mind-wandering
#15
Shogo Kajimura, Takanori Kochiyama, Nobuhito Abe, Michio Nomura
The default mode network (DMN) is considered a unified core brain function for generating subjective mental experiences, such as mind wandering. We propose a novel cognitive framework for understanding the unity of the DMN from the perspective of hemispheric asymmetry. Using transcranial direct current stimulation (tDCS), effective connectivity estimation, and machine learning, we show that the bilateral angular gyri (AG), which are core regions of the DMN, exhibit heterogeneity in both inherent network organization and mind wandering regulation...
April 21, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29681876/null-tdcs-effects-in-a-sustained-attention-task-the-modulating-role-of-learning
#16
Noa Jacoby, Michal Lavidor
The purpose of this study was to investigate sustained attention through modulation of the fronto-cerebral network with transcranial direct current stimulation (tDCS) in adults with attention-deficit/hyperactivity disorder (ADHD) and control participants. Thirty-seven participants (21 with ADHD) underwent three separate sessions (baseline, active tDCS, and sham) and performed the MOXO Continuous Performance Test (CPT). We applied double anodal stimulation of 1.8 mA tDCS for 20 min over the left and right dorsolateral prefrontal cortex (DLPFC), with the cathode over the cerebellum...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29674948/low-to-no-effect-application-of-trns-during-two-digit-addition
#17
Silke M Bieck, Christina Artemenko, Korbinian Moeller, Elise Klein
Transcranial electric stimulation such as transcranial random noise stimulation (tRNS) and transcranial direct current stimulation (tDCS) have been used to investigate structure-function relationships in numerical cognition. Recently, tRNS was suggested to be more effective than tDCS. However, so far there is no evidence on the differential impact of tDCS and tRNS on numerical cognition using the same experimental paradigm. In the present study, we used a two-digit addition paradigm for which significant-albeit small-effects of tDCS were observed previously to evaluate the impact of parietal and frontal tRNS on specific numerical effects...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29660416/cognitive-effects-of-transcranial-direct-current-stimulation-treatment-in-patients-with-major-depressive-disorder-an-individual-patient-data-meta-analysis-of-randomised-sham-controlled-trials
#18
REVIEW
Donel M Martin, Adriano Moffa, Stevan Nikolin, Djamila Bennabi, André R Brunoni, William Flannery, Emmanuel Haffen, Shawn M McClintock, Marina L Moreno, Frank Padberg, Ulrich Palm, Colleen K Loo
Transcranial direct current stimulation (tDCS) has emerged as a promising new treatment for major depression. While recent randomised, sham-controlled studies found tDCS to have antidepressant effects, it remains to be determined whether a tDCS treatment course may also enhance cognitive function independent of mood effects in depressed patients. This systematic review and individual patient data (IPD) meta-analysis examined cognitive outcomes from randomised, sham-controlled trials of tDCS treatment for major depression...
July 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29658441/efficacy-of-transcranial-direct-current-stimulation-combined-with-cognitive-training-in-the-treatment-of-apathy-in-patients-with-alzheimer-s-disease-study-protocol-for-a-randomized-trial
#19
Jean-Paul Nguyen, Claire Boutoleau-Bretonniere, Jean-Pascal Lefaucheur, Alcira Suarez, Helene Gaillard, Guillaume Chapelet, Sebastien Abad, Aurelien Van Langhenhove, Julian Nizard, Laure de Decker
BACKGROUND: Apathy, commonly defined as loss of motivation, is a symptom frequently encountered in Alzheimer's disease (AD). The treatment of apathy remains challenging in the absence of any truly effective medications. Transcranial magnetic stimulation (rTMS) or transcranial direct current stimulation (tDCS) can improve cognitive disorders, but do not appear to improve apathy. Isolated cognitive training also appears to have no effect on apathy. We propose to test the efficacy of a new procedure for the treatment of apathy in AD patients consisting of a combination of tDCS and cognitive training, based on the latest guidelines for the design of therapeutic trials in this field...
April 16, 2018: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/29651240/cognitive-neuroscience-of-attention-deficit-hyperactivity-disorder-adhd-and-its-clinical-translation
#20
REVIEW
Katya Rubia
This review focuses on the cognitive neuroscience of Attention Deficit Hyperactivity Disorder (ADHD) based on functional magnetic resonance imaging (fMRI) studies and on recent clinically relevant applications such as fMRI-based diagnostic classification or neuromodulation therapies targeting fMRI deficits with neurofeedback (NF) or brain stimulation. Meta-analyses of fMRI studies of executive functions (EFs) show that ADHD patients have cognitive-domain dissociated complex multisystem impairments in several right and left hemispheric dorsal, ventral and medial fronto-cingulo-striato-thalamic and fronto-parieto-cerebellar networks that mediate cognitive control, attention, timing and working memory (WM)...
2018: Frontiers in Human Neuroscience
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