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TDCS and cognition

Katherine R Naish, Lana Vedelago, James MacKillop, Michael Amlung
BACKGROUND: There is growing interest in non-invasive brain stimulation techniques as treatments for addictive disorders. While multiple reviews have examined the effects of neuromodulation on craving and consumption, there has been no review of how neuromodulation affects cognitive functioning in addiction. This systematic review examined studies of the cognitive effects of transcranial direct current stimulation (tDCS) and transcranial magnetic stimulation (TMS) in individuals exhibiting addictive behavior...
October 3, 2018: Drug and Alcohol Dependence
J P Lindenmayer, Mila Kirstie C Kulsa, Tania Sultana, Amandeep Kaur, Ran Yang, Isidora Ljuri, Benedicto Parker, Anzalee Khan
BACKGROUND: Transcranial direct-current stimulation (tDCS), a non-invasive neurostimulation treatment, has been reported in a number of sham-controlled studies to show significant improvements in treatment-resistant auditory hallucinations in schizophrenia patients, primarily in ambulatory and higher-functioning patients, but little is known of the effects of tDCS on hospitalized, low-functioning inpatients. OBJECTIVE/HYPOTHESIS: The purpose of this study was to examine the efficacy and safety of tDCS for auditory hallucinations in hospitalized ultra-treatment-resistant schizophrenia (TRS) and to evaluate the effects of tDCS on cognitive functions...
October 2, 2018: Brain Stimulation
Aakash V Sathappan, Bruce M Luber, Sarah H Lisanby
Pharmacotherapy, psychotherapy, and non-invasive brain stimulation (NIBS)1 each show efficacy in the treatment of psychiatric disorders; however, more efficacious interventions are needed as reflected by an overall unmet need in mental health care. While each modality has typically been studied and developed as a monotherapy, in practice they are typically used in combination. Research has begun to emerge studying the potential synergistic actions of multi-modal, combination therapies. For example, NIBS combined with rehabilitation strategies have demonstrated some success for speech and motor rehabilitation in stroke patients...
October 9, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
Maximilian A Friehs, Christian Frings
The stop-signal task (SST) is assumed to reliably measure response inhibition; specifically, in this task participants sometimes have to withhold a response according to the onset of a sudden cue. The response-stopping process is estimated by a stochastic model that delivers the stop-signal reaction time (SSRT; Verbruggen & Logan, 2009), that is, the latency to inhibit prepotent responses. The right dorsolateral prefrontal cortex (rDLPFC) plays a key role in goal directed cognitive control in general and particularly an increased activation has been associated with better SST performance (that is with shorter SSRT)...
October 8, 2018: Journal of Experimental Psychology. Human Perception and Performance
T Schwippel, I Papazova, W Strube, A J Fallgatter, A Hasan, C Plewnia
Schizophrenia is a severe and often detrimental psychiatric disorder. The individual patients' level of functioning is essentially determined by cognitive, particularly working memory (WM), deficits that are critically linked to dysfunctional activity of the dorsolateral prefrontal cortex (dlPFC). Transcranial direct current stimulation (tDCS) can transiently modulate activity of the dlPFC and remote areas and has been shown to improve WM functions. It may therefore provide a new, targeted treatment option...
October 3, 2018: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Yijia Zheng, Ye Wang, Zhuang Yue, Xiaoying Wang, Jue Zhang, Jing Fang
Previous behavioral studies have shown that high-intensity cognitive tasks weaken balance control in elder adults. Moreover, age-related loss of plantar sensation is considered to be an important contributing factor to the occurrence of falls. Recently, we have realized that transcranial direct current stimulation (tDCS) can effectively improve the balance of the elderly under the dual-task, but its underlying regulatory mechanism is not clear. In this study, task functional Magnetic Resonance Imaging (fMRI) was used to study the brain's response to foot stimuli under foot stimuli or dual-task (foot stimuli and cognitive task) conditions to explain the effect of the addition of cognitive tasks during balance in 16 healthy elderly adults...
October 2, 2018: Neuroscience Letters
Sook-Lei Liew, Tziporah Thompson, Joel Ramirez, Peter A Butcher, Jordan A Taylor, Pablo A Celnik
We routinely make fine motor adjustments to maintain optimal motor performance. These adaptations have been attributed to both implicit, error-based mechanisms, and explicit, strategy-based mechanisms. However, little is known about the neural basis of implicit vs. explicit learning. Here, we aimed to use anodal transcranial direct current stimulation (tDCS) to probe the relationship between different brain regions and learning mechanisms during a visuomotor adaptation task in humans. We hypothesized that anodal tDCS over the cerebellum (CB) should increase implicit learning while anodal tDCS over the dorsolateral prefrontal cortex (dlPFC), a region associated with higher-level cognition, should facilitate explicit learning...
2018: Frontiers in Neuroscience
A K Martin, J Huang, A Hunold, M Meinzer
Theories of right temporoparietal junction (rTPJ) function in social cognition include self-other distinction, self-inhibition, or embodied rotation, whereas the dorsomedial prefrontal cortex (dmPFC) is associated with integrating social information. However, no study has provided causal evidence for dissociable roles of the rTPJ and dmPFC in social cognition. A total of 52 healthy young adults were stratified to receive either dmPFC or rTPJ anodal high-definition transcranial direct current stimulation (HD-tDCS) in a sham-controlled, double-blinded, repeated measures design...
October 1, 2018: Cerebral Cortex
Masamitsu Naka, Daisuke Matsuzawa, Daisuke Ishii, Hiroyuki Hamada, Tomoko Uchida, Katsuo Sugita, Chihiro Sutoh, Eiji Shimizu
Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that modulates cortical excitability in a polarity-dependent manner. The diffuse nature of tDCS makes it difficult to investigate the optimal stimulation parameters for more effective and specific cognitive enhancement; to address this deficit, a more focalized stimulation technique, high-definition tDCS (HD-tDCS), has been developed. To date, only a few studies have examined the effects of HD-tDCS on cognitive functions; and none has investigated the effects of HD-tDCS on different sensory modalities of verbal working memory...
September 26, 2018: Neuroscience Letters
Alex I Wiesman, Mackenzie S Mills, Timothy J McDermott, Rachel K Spooner, Nathan M Coolidge, Tony W Wilson
The ability to preferentially deploy neural resources to the visual space is an important component of normative cognitive function, however, the population-level cortical dynamics that sub-serve this ability are not fully understood. Specifically, rhythmic activity in the occipital cortices (e.g., theta, alpha, and gamma oscillations) has been strongly implicated in this cognitive process, but these neural responses are difficult to non-invasively manipulate in a systematic manner. In this study, transcranial direct-current stimulation (tDCS) was used to modulate brain activity, while high-density magnetoencephalography (MEG) was employed to quantify changes in rhythm-specific neural activity in the occipital cortices of 57 adults performing a visuospatial processing paradigm...
September 1, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Sara M Vacas, Florindo Stella, Julia C Loureiro, Frederico Simões do Couto, Albino J Oliveira-Maia, Orestes V Forlenza
BACKGROUND: Pharmacological and conventional non-pharmacological treatments for behavioural and psychological symptoms of dementia (BPSD) have only modest efficacy. Furthermore, pharmacotherapy carries the risk of important side-effects. Non-invasive brain stimulation (repetitive transcranial magnetic stimulation; TMS or transcranial direct current stimulation; tDCS) are valuable and safe for cognitive function in Alzheimer Disease (AD). However, there have been few studies, and there is no consensus, regarding the use of these techniques to treat BPSD...
September 24, 2018: International Journal of Geriatric Psychiatry
Takuma Inagawa, Zui Narita, Norio Sugawara, Kazushi Maruo, Andrew Stickley, Yuma Yokoi, Tomiki Sumiyoshi
There have been increasing efforts to investigate the effects of neuromodulation techniques, such as transcranial direct current stimulation (tDCS), on cognitive impairment in dementia and related conditions. In this systematic review and meta-analysis, we assessed the efficacy of multisession anodal tDCS compared with sham stimulation for improving global cognition and specific cognitive domains in both Alzheimer's disease and mild cognitive impairment. Eight articles meeting the criteria for inclusion in the meta-analysis were selected...
September 19, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
Ann Van de Winckel, James R Carey, Teresa A Bisson, Elsa C Hauschildt, Christopher D Streib, William K Durfee
BACKGROUND: Transcranial direct current stimulation (tDCS) is an effective neuromodulation adjunct to repetitive motor training in promoting motor recovery post-stroke. Finger tracking training is motor training whereby people with stroke use the impaired index finger to trace waveform-shaped lines on a monitor. Our aims were to assess the feasibility and safety of a telerehabilitation program consisting of tDCS and finger tracking training through questionnaires on ease of use, adverse symptoms, and quantitative assessments of motor function and cognition...
September 18, 2018: Journal of Neuroengineering and Rehabilitation
Sheida Rabipour, Allan D Wu, Patrick S R Davidson, Marco Iacoboni
Growing interest surrounds transcranial direct current stimulation (tDCS) as a safe and inexpensive method for improving cognitive functions and mood. Nevertheless, tDCS studies rarely examine psychological factors such as expectations of outcomes, which may influence tDCS responsiveness through placebo-like effects. Here we sought to evaluate the potential influence of expectations on tDCS intervention outcomes. We assessed expectations of tDCS outcomes in 88 healthy young adults on three occasions: i) at baseline; ii) after reading information implying either high or low effectiveness of stimulation; and iii) after a single-session of sham-controlled anodal tDCS applied to the left dorsolateral prefrontal cortex, during working memory (WM) training...
October 2018: Neuropsychologia
Grundey Jessica, Barlay Jerick, Batsikadze Giorgi, Kuo Min-Fang, Paulus Walter, Nitsche Michael
KEY POINT: Nicotine modulates cognition and memory function by targeting the nicotinic acetylcholine receptor and releasing different transmitter systems postsynaptically. With both nicotine-generated mechanisms, calcium influx and calcium permeability can be regulated, which is a key requirement for the induction of long-term potentiation, the physiological basis of learning and memory function. We try to unmask the underlying mechanism of nicotinic effects on anodal tDCS-induced LTP-like plasticity based on the hypothesis of calcium-dependency...
September 15, 2018: Journal of Physiology
Shashank Agarwal, Natalie Pawlak, Alberto Cucca, Kush Sharma, Bryan Dobbs, Michael Shaw, Leigh Charvet, Milton Biagioni
BACKGROUND: Transcranial direct current stimulation (tDCS) has been explored as a potential intervention in Parkinson's disease (PD) and recent studies have shown promising results in cognitive, gait and motor function. However, evidence of efficacy is limited due to small size studies, short treatment periods, lack of standardization of methodologies and other study design limitations. Remotely supervised-tDCS (RS-tDCS) allows "at-home" study participation, potentially easing recruitment, compliance and overall feasibility for clinical studies...
November 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Maddalena Marini, Mahzarin R Banaji, Alvaro Pascual-Leone
Given that globalization has brought different sociocultural groups together on an unprecedented scale, understanding the neurobiology underlying intergroup social behavior has never been more urgent. Social and cognitive scientists are increasingly using noninvasive brain-stimulation techniques (NBS) to explore the neural mechanisms underlying implicit attitudes and stereotyping. NBS methods, such as transcranial magnetic stimulation (TMS) and transcranial direct-current stimulation (tDCS), can interfere with ongoing brain activity in targeted brain areas and distributed networks, and thus offer unique insights into the mechanisms underlying how we perceive, understand, and make decisions about others...
September 1, 2018: Trends in Cognitive Sciences
Ki Pi Yu, Yong-Soon Yoon, Jin Gyeong Lee, Ji Sun Oh, Jeong-Seog Lee, Taeyong Seog, Han-Young Lee
OBJECTIVE: To evaluate the effects of electric cortical stimulation (ECS) and transcranial direct current stimulation (tDCS) on motor and cognitive function recovery and brain plasticity in focal traumatic brain injury (TBI) of rats model. METHODS: Forty rats were pre-trained to perform a single pellet reaching task (SPRT), rotarod test (RRT), and Y-maze test for 14 days, then a focal TBI was induced by a weight drop model on the motor cortex. All rats were randomly assigned to one of the three groups: anodal ECS (50 Hz and 194 μs) (ECS group), tDCS (0...
August 2018: Annals of Rehabilitation Medicine
O A Bragina, D A Lara, E M Nemoto, C W Shuttleworth, O V Semyachkina-Glushkovskaya, D E Bragin
Traumatic brain injury (TBI), causing neurological deficit in 70% of survivors, still lacks a clinically proven effective therapy. Transcranial direct current stimulation (tDCS) has emerged as a promising electroceutical therapeutic intervention possibly suitable for TBI; however, due to limited animal studies the mechanisms and optimal parameters are unknown. Using a mouse model of TBI we evaluated the acute effects of the anodal tDCS on cerebral blood flow (CBF) and tissue oxygenation, and assessed its efficacy in long-term neurologic recovery...
2018: Advances in Experimental Medicine and Biology
Emma S Welch, Anne Weigand, Julia E Hooker, Noah S Philip, Audrey R Tyrka, Daniel Z Press, Linda L Carpenter
BACKGROUND: Cognitive behavioral therapy (CBT) is effective in the treatment of major depressive disorder (MDD). Transcranial Direct Current Stimulation (tDCS) has demonstrated preliminary antidepressant effects and beneficial effects on cognitive function. OBJECTIVE: We investigated the feasibility and acceptability of using tDCS to enhance the effects of computer-based CBT for treatment of MDD. MATERIALS AND METHODS: In a randomized, double-blind, sham-controlled study, 14 patients with MDD on stable or no pharmacotherapy received active or sham bifrontal tDCS for four weeks with concurrent CBT...
August 28, 2018: Neuromodulation: Journal of the International Neuromodulation Society
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