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https://www.readbyqxmd.com/read/28813921/effect-on-the-classification-of-motor-imagery-in-eeg-after-applying-anodal-tdcs-with-a-4%C3%A3-1-ring-montage-over-the-motor-cortex
#1
I N Angulo-Sherman, M Rodriguez-Ugarte, E Ianez, M Ortiz, J M Azorin
Transcranial direct stimulation (tDCS) is a technique for modulating brain excitability that has potential to be used in motor neurorehabilitation by enhancing motor activity, such as motor imagery (MI). tDCS effects depend on different factors, like current density and the position of the stimulating electrodes. This study presents preliminary results of the evaluation of the effect of current density on MI performance by measuring right-hand/feet MI accuracy of classification from electroencephalographic (EEG) measurements after anodal tDCS is applied with a 4×1 ring montage over the right-hand or feet motor cortex...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28729822/low-intensity-focused-tdcs-over-the-motor-cortex-shows-inefficacy-to-improve-motor-imagery-performance
#2
Irma N Angulo-Sherman, Marisol Rodríguez-Ugarte, Eduardo Iáñez, Jose M Azorín
Transcranial direct current stimulation (tDCS) is a brain stimulation technique that can enhance motor activity by stimulating the motor path. Thus, tDCS has the potential of improving the performance of brain-computer interfaces during motor neurorehabilitation. tDCS effects depend on several aspects, including the current density, which usually varies between 0.02 and 0.08 mA/cm(2), and the location of the stimulation electrodes. Hence, testing tDCS montages at several current levels would allow the selection of current parameters for improving stimulation outcomes and the comparison of montages...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28712338/medial-prefrontal-cortex-stimulation-modulates-irony-processing-as-indexed-by-the-n400
#3
Nathalia Ishikawa Baptista, Mirella Manfredi, Paulo Sérgio Boggio
In this study, we investigated whether the ERP responses observed during a verbal irony comprehension task might represent the cortical manifestation of the Medial Prefrontal Cortex (MPFC) activity. We performed a tDCS-EEG study in which we analyzed the effects of tDCS polarities (anode, cathode, sham) over the MPFC during a verbal irony task. We presented visual short stories portraying everyday situations followed by written statements in either an ironic or literal condition, whose meaning was referred to in the previous context...
July 17, 2017: Social Neuroscience
https://www.readbyqxmd.com/read/28702347/tdcs-modulates-cortical-excitability-in-patients-with-disorders-of-consciousness
#4
Yang Bai, Xiaoyu Xia, Jiannan Kang, Yi Yang, Jianghong He, Xiaoli Li
Transcranial direct current stimulation (tDCS) has been reported to be a promising technique for consciousness improvement for patients with disorders of consciousness (DOC). However, there has been no direct electrophysiological evidence to demonstrate the efficacy of tDCS on patients with DOC. Therefore, we aim to measure the cortical excitability changes induced by tDCS in patients with DOC, to find electrophysiological evidence supporting the therapeutic efficacy of tDCS on patients with DOC. In this study, we enrolled sixteen patients with DOC, including nine vegetative state (VS) and seven minimally conscious state (MCS) (six females and ten males)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28676697/a-novel-3d-printed-head-phantom-with-anatomically-realistic-geometry-and-continuously-varying-skull-resistivity-distribution-for-electrical-impedance-tomography
#5
Jie Zhang, Bin Yang, Haoting Li, Feng Fu, Xuetao Shi, Xiuzhen Dong, Meng Dai
Phantom experiments are an important step for testing during the development of new hardware or imaging algorithms for head electrical impedance tomography (EIT) studies. However, due to the sophisticated anatomical geometry and complex resistivity distribution of the human head, constructing an accurate phantom for EIT research remains challenging, especially for skull modelling. In this paper, we designed and fabricated a novel head phantom with anatomically realistic geometry and continuously varying skull resistivity distribution based on 3D printing techniques...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28587498/surface-eeg-transcranial-direct-current-stimulation-tdcs-closed-loop-system
#6
Jorge Leite, Leon Morales-Quezada, Sandra Carvalho, Aurore Thibaut, Deniz Doruk, Chiun-Fan Chen, Steven C Schachter, Alexander Rotenberg, Felipe Fregni
Conventional transcranial direct current stimulation (tDCS) protocols rely on applying electrical current at a fixed intensity and duration without using surrogate markers to direct the interventions. This has led to some mixed results; especially because tDCS induced effects may vary depending on the ongoing level of brain activity. Therefore, the objective of this preliminary study was to assess the feasibility of an EEG-triggered tDCS system based on EEG online analysis of its frequency bands. Six healthy volunteers were randomized to participate in a double-blind sham-controlled crossover design to receive a single session of 10[Formula: see text]min 2[Formula: see text]mA cathodal and sham tDCS...
September 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28530336/-noninvasive-brain-stimulation-in-neuropsychiatric-disorders
#7
REVIEW
Doron Todder, Nimrod Grisaru, Zeev Kaplan
Noninvasive brain stimulation is a growing field of treatment for many neuropsychiatric problems. In this review, several of the more common brain stimulation devices are presented. Specifically, we will review Transcranial Magnetic Stimulation (TMS), Transcranial Direct Current Stimulation (tDCS), Alternating Current Stimulation (ACS), Infrared Stimulation, Electroencephalography Neurofeedback (EEG-NF) and functional Magnetic Resonance Imagining Neurofeedback (fMRI-NF). We will outline some of the properties of these devices including the mechanism, side effect profile, using sham for research and major future developments...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28530154/determining-electrode-placement-for-transcranial-direct-current-stimulation-a-comparison-of-eeg-versus-tms-guided-methods
#8
Tonya L Rich, Jeremiah S Menk, Kyle D Rudser, Mo Chen, Gregg D Meekins, Edgar Peña, Timothy Feyma, Kay Bawroski, Christina Bush, Bernadette T Gillick
Transcranial direct current stimulation (tDCS) is increasingly researched as an adjuvant to motor rehabilitation for children with hemiparesis. The optimal method for the primary motor cortex (M1) somatotopic localization for tDCS electrode placement has not been established. The objective, therefore, was to determine the location of the M1 derived using the 10/20 electroencephalography (EEG) system and transcranial magnetic stimulation (TMS) in children with hemiparesis (CWH) and a comparison group of typically developing children (TDC)...
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28503139/a-pilot-study-on-the-effects-of-transcranial-direct-current-stimulation-on-brain-rhythms-and-entropy-during-self-paced-finger-movement-using-the-epoc-helmet
#9
Florian C A A Bodranghien, Margot Langlois Mahe, Serge Clément, Mario U Manto
Transcranial direct current stimulation (tDCS) of the cerebellum is emerging as a novel non-invasive tool to modulate the activity of the cerebellar circuitry. In a single blinded study, we applied anodal tDCS (atDCS) of the cerebellum to assess its effects on brain entropy and brain rhythms during self-paced sequential finger movements in a group of healthy volunteers. Although wearable electroencephalogram (EEG) systems cannot compete with traditional clinical/laboratory set-ups in terms of accuracy and channel density, they have now reached a sufficient maturity to envision daily life applications...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28502585/frontoparietal-neurostimulation-modulates-working-memory-training-benefits-and-oscillatory-synchronization
#10
Kevin T Jones, Dwight J Peterson, Kara J Blacker, Marian E Berryhill
There is considerable interest in maintaining working memory (WM) because it is essential to accomplish most cognitive tasks, and it is correlated with fluid intelligence and ecologically valid measures of daily living. Toward this end, WM training protocols aim to improve WM capacity and extend improvements to unpracticed domains, yet success is limited. One emerging approach is to couple WM training with transcranial direct current stimulation (tDCS). This pairing of WM training with tDCS in longitudinal designs promotes behavioral improvement and evidence of transfer of performance gains to untrained WM tasks...
July 15, 2017: Brain Research
https://www.readbyqxmd.com/read/28476095/effect-of-transcranial-direct-current-stimulation-on-swallowing-apraxia-and-cortical-excitability-in-stroke-patients
#11
Ying Yuan, Jie Wang, Dongyu Wu, Xiaobo Huang, Weiqun Song
BACKGROUND: Swallowing apraxia is characterized by impaired volitional swallowing but relatively preserved reflexive swallowing. Few studies are available on the effectiveness of behavioral therapy and management of the condition. OBJECTIVE: This study aimed to investigate the effect of transcranial direct current stimulation (tDCS) on swallowing apraxia and cortical activation in stroke patients. METHODS: The study included three inpatients (age 48-70 years; 1 male, 2 females; duration of stroke, 35-55 d) with post-stroke swallowing apraxia and six age-matched healthy subjects (age 45-65 years; 3 males, 3 females)...
May 5, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28420382/effect-of-tdcs-stimulation-of-motor-cortex-and-cerebellum-on-eeg-classification-of-motor-imagery-and-sensorimotor-band-power
#12
Irma N Angulo-Sherman, Marisol Rodríguez-Ugarte, Nadia Sciacca, Eduardo Iáñez, José M Azorín
BACKGROUND: Transcranial direct current stimulation (tDCS) is a technique for brain modulation that has potential to be used in motor neurorehabilitation. Considering that the cerebellum and motor cortex exert influence on the motor network, their stimulation could enhance motor functions, such as motor imagery, and be utilized for brain-computer interfaces (BCIs) during motor neurorehabilitation. METHODS: A new tDCS montage that influences cerebellum and either right-hand or feet motor area is proposed and validated with a simulation of electric field...
April 19, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28324765/hd-tdcs-in-refractory-lateral-frontal-lobe-epilepsy-patients
#13
Sanaz Ahmadi Karvigh, Mahmoud Motamedi, Mahsa Arzani, Javad Hasan Nia Roshan
PURPOSE: To evaluate the anticonvulsant effect of the novel high definition transcranial direct current stimulation (HD-tDCS) method on patients with refractory lateral frontal lobe epilepsy. The effects of HD-tDCS on working memory were also examined. METHOD: 10 adult patients with intractable lateral frontal lobe epilepsy were studied. A central cathode electrode was placed on the epileptogenic zone according to LTM, and 20-min sessions of 2mA HD-tDCS were applied for 10 consecutive days...
April 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28320187/repeated-transcranial-direct-current-stimulation-in-prolonged-disorders-of-consciousness-a-double-blind-cross-over-study
#14
RANDOMIZED CONTROLLED TRIAL
Anna Estraneo, Angelo Pascarella, Pasquale Moretta, Orsola Masotta, Salvatore Fiorenza, Grazia Chirico, Emanuela Crispino, Vincenzo Loreto, Luigi Trojano
OBJECTIVE: To evaluate effects of 5 sessions of transcranial direct current stimulation (tDCS) over the left dorsolateral prefrontal cortex in patients with prolonged disorders of consciousness (DOC). METHODS: Seven patients in vegetative state (VS) and 6 in minimally conscious state (MCS), at ≥3months after brain injury, were randomized into two groups: group 1 received one week of active tDCS and 1week of sham stimulation, separated by 1 resting week; group 2 received active and sham stimulation in reverse order...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28274831/effects-of-prefrontal-bipolar-and-high-definition-transcranial-direct-current-stimulation-on-cortical-reactivity-and-working-memory-in-healthy-adults
#15
Aron T Hill, Nigel C Rogasch, Paul B Fitzgerald, Kate E Hoy
Transcranial direct current stimulation (tDCS) is a well-recognised neuromodulatory technology which has been shown to induce short-lasting changes in motor-cortical excitability. The recent and rapid expansion of tDCS into the cognitive domain, however, necessitates deeper mechanistic understanding of its neurophysiological effects over non-motor brain regions. The present study utilised transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) to probe the immediate and longer-term effects of both a bipolar (BP-tDCS) and more focal 4×1 High-Definition tDCS (HD-tDCS) montage applied over the left DLPFC on TMS-evoked potentials (TEPs) and oscillations in 19 healthy adult participants...
May 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/28269452/predicting-brain-stimulation-treatment-outcomes-of-depressed-patients-through-the-classification-of-eeg-oscillations
#16
Alaa M Al-Kaysi, Ahmed Al-Ani, Colleen K Loo, Michael Breakspear, Tjeerd W Boonstra
Major depressive disorder (MDD) is a mental disorder that is characterized by negative thoughts, mood and behavior. Transcranial direct current stimulation (tDCS) has recently emerged as a promising brain-stimulation treatment for MDD. A standard tDCS treatment involves numerous sessions that run over a few weeks, however, not all participants respond to this type of treatment. This study aims to predict which patients improve in mood and cognition in response to tDCS treatment by analyzing electroencephalography (EEG) of MDD patients that was collected at the start of tDCS treatment...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269450/oscillatory-brain-activity-changes-by-anodal-tdcs-an-ecog-study-on-anesthetized-beagles
#17
Sehyeon Jang, Donghyeon Kim, Junkil Been, Hohyun Cho, Sung Chan Jun
Measuring neuronal activity of transcranial direct current stimulation (tDCS) is essential for investigating tDCS in stimuli or after stimuli effects. The aim of this study was to investigate the oscillatory changes from anodal tDCS using electrocorticography (ECoG) on beagles. We applied 2 mA anodal tDCS and monitored the ECoG signals (32 channels, 512 Hz sampling rate) for 15 minutes in three anesthetized beagles. Then, we compared the power changes before, during, and after tDCS in six different bands (delta, theta, alpha, beta, low-gamma, and mid-gamma bands)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227698/predicting-brain-stimulation-treatment-outcomes-of-depressed-patients-through-the-classification-of-eeg-oscillations
#18
Alaa M Al-Kaysi, Ahmed Al-Ani, Colleen K Loo, Michael Breakspear, Tjeerd W Boonstra, Alaa M Al-Kaysi, Ahmed Al-Ani, Colleen K Loo, Michael Breakspear, Tjeerd W Boonstra, Michael Breakspear, Ahmed Al-Ani, Tjeerd W Boonstra, Colleen K Loo
Major depressive disorder (MDD) is a mental disorder that is characterized by negative thoughts, mood and behavior. Transcranial direct current stimulation (tDCS) has recently emerged as a promising brain-stimulation treatment for MDD. A standard tDCS treatment involves numerous sessions that run over a few weeks, however, not all participants respond to this type of treatment. This study aims to predict which patients improve in mood and cognition in response to tDCS treatment by analyzing electroencephalography (EEG) of MDD patients that was collected at the start of tDCS treatment...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227696/oscillatory-brain-activity-changes-by-anodal-tdcs-an-ecog-study-on-anesthetized-beagles
#19
Sehyeon Jang, Donghyeon Kim, Junkil Been, Hohyun Cho, Sung Chan Jun, Sehyeon Jang, Donghyeon Kim, Junkil Been, Hohyun Cho, Sung Chan Jun, Donghyeon Kim, Junkil Been, Sung Chan Jun, Hohyun Cho, Sehyeon Jang
Measuring neuronal activity of transcranial direct current stimulation (tDCS) is essential for investigating tDCS in stimuli or after stimuli effects. The aim of this study was to investigate the oscillatory changes from anodal tDCS using electrocorticography (ECoG) on beagles. We applied 2 mA anodal tDCS and monitored the ECoG signals (32 channels, 512 Hz sampling rate) for 15 minutes in three anesthetized beagles. Then, we compared the power changes before, during, and after tDCS in six different bands (delta, theta, alpha, beta, low-gamma, and mid-gamma bands)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28029427/predicting-tdcs-treatment-outcomes-of-patients-with-major-depressive-disorder-using-automated-eeg-classification
#20
Alaa M Al-Kaysi, Ahmed Al-Ani, Colleen K Loo, Tamara Y Powell, Donel M Martin, Michael Breakspear, Tjeerd W Boonstra
BACKGROUND: Transcranial direct current stimulation (tDCS) is a promising treatment for major depressive disorder (MDD). Standard tDCS treatment involves numerous sessions running over a few weeks. However, not all participants respond to this type of treatment. This study aims to investigate the feasibility of identifying MDD patients that respond to tDCS treatment based on resting-state electroencephalography (EEG) recorded prior to treatment commencing. METHODS: We used machine learning to predict improvement in mood and cognition during tDCS treatment from baseline EEG power spectra...
January 15, 2017: Journal of Affective Disorders
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