scholarly journals A Novel Design of Electrode Holder for High-Definition Transcranial Electrical Stimulation

2021 ◽  
Vol 14 (6) ◽  
pp. 1692
Author(s):  
Cassandra Solomons ◽  
Vivekanandan Shanmugasundaram
Keyword(s):  
Electrical Stimulation ◽  
Transcranial Electrical Stimulation ◽  
High Definition ◽  
Electrode Holder ◽  
Novel Design

scholarly journals Dataset of concurrent EEG, ECG, and behavior with multiple doses of transcranial electrical stimulation

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Nigel Gebodh ◽  
Zeinab Esmaeilpour ◽  
Abhishek Datta ◽  
Marom Bikson
Keyword(s):  
Electrical Stimulation ◽  
Demographic Data ◽  
Transcranial Electrical Stimulation ◽  
Brain State ◽  
High Definition ◽  
Before And After ◽  
Human Participant ◽  
Cortical Regions ◽  
And Behavior ◽  
Unique Dataset

AbstractWe present a dataset combining human-participant high-density electroencephalography (EEG) with physiological and continuous behavioral metrics during transcranial electrical stimulation (tES). Data include within participant application of nine High-Definition tES (HD-tES) types, targeting three cortical regions (frontal, motor, parietal) with three stimulation waveforms (DC, 5 Hz, 30 Hz); more than 783 total stimulation trials over 62 sessions with EEG, physiological (ECG, EOG), and continuous behavioral vigilance/alertness metrics. Experiment 1 and 2 consisted of participants performing a continuous vigilance/alertness task over three 70-minute and two 70.5-minute sessions, respectively. Demographic data were collected, as well as self-reported wellness questionnaires before and after each session. Participants received all 9 stimulation types in Experiment 1, with each session including three stimulation types, with 4 trials per type. Participants received two stimulation types in Experiment 2, with 20 trials of a given stimulation type per session. Within-participant reliability was tested by repeating select sessions. This unique dataset supports a range of hypothesis testing including interactions of tDCS/tACS location and frequency, brain-state, physiology, fatigue, and cognitive performance.

Transcranial electrical stimulation devices

2021 ◽  
Author(s):  
Dennis Q. Truong ◽  
Niranjan Khadka ◽  
Angel V. Peterchev ◽  
Marom Bikson
Keyword(s):  
Electrical Stimulation ◽  
Brain Function ◽  
Computational Models ◽  
Solid Metal ◽  
Transcranial Electrical Stimulation ◽  
Waveform Generator ◽  
High Definition ◽  
Low Intensity ◽  
Support Device ◽  
Transcranial Alternating Current Stimulation

Transcranial electrical stimulation (tES) devices apply electrical waveforms through electrodes placed on the scalp to modulate brain function. This chapter describes the principles, types, and components of tES devices as well as practical considerations for their use. All tES devices include a waveform generator, electrodes, and an adhesive or headgear to position the electrodes. tES dose is defined by the size and position of electrodes, and the waveform, duration, and intensity of the current. Many sub-classes of tES are named based on dose. This chapter focuses on low intensity tES, which includes transcranial direct current stimulation (tDCS), transcranial alternating current stimulation (tACS), and transcranial pulsed current stimulation (tPCS). tES electrode types are reviewed, including electrolyte-soaked sponge, adhesive hydrogel, high-definition, hand-held solid metal, free paste on electrode, and dry. Computational models support device design and individual targeting. The tolerability of tES is protocol specific, and medical grade devices minimize risk.

Transcranial Electrical Stimulation in Post-Stroke Cognitive Rehabilitation

2016 ◽  
Vol 21 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Silvia Convento ◽  
Cristina Russo ◽  
Luca Zigiotto ◽  
Nadia Bolognini
Keyword(s):  
Electrical Stimulation ◽  
Cognitive Rehabilitation ◽  
Cognitive Disorders ◽  
Spatial Neglect ◽  
Transcranial Electrical Stimulation ◽  
Clinical Settings ◽  
Post Stroke ◽  
Neuropsychological Disorders ◽  
Current State ◽  
Stimulation Technique

Abstract. Cognitive rehabilitation is an important area of neurological rehabilitation, which aims at the treatment of cognitive disorders due to acquired brain damage of different etiology, including stroke. Although the importance of cognitive rehabilitation for stroke survivors is well recognized, available cognitive treatments for neuropsychological disorders, such as spatial neglect, hemianopia, apraxia, and working memory, are overall still unsatisfactory. The growing body of evidence supporting the potential of the transcranial Electrical Stimulation (tES) as tool for interacting with neuroplasticity in the human brain, in turn for enhancing perceptual and cognitive functions, has obvious implications for the translation of this noninvasive brain stimulation technique into clinical settings, in particular for the development of tES as adjuvant tool for cognitive rehabilitation. The present review aims at presenting the current state of art concerning the use of tES for the improvement of post-stroke visual and cognitive deficits (except for aphasia and memory disorders), showing the therapeutic promises of this technique and offering some suggestions for the design of future clinical trials. Although this line of research is still in infancy, as compared to the progresses made in the last years in other neurorehabilitation domains, current findings appear very encouraging, supporting the development of tES for the treatment of post-stroke cognitive impairments.

scholarly journals Effects of Electrical Stimulation in Tinnitus Patients: Conventional Versus High-Definition tDCS

2018 ◽  
Vol 32 (8) ◽  
pp. 714-723 ◽  
Author(s):  
Laure Jacquemin ◽  
Giriraj Singh Shekhawat ◽  
Paul Van de Heyning ◽  
Griet Mertens ◽  
Erik Fransen ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Depression Scale ◽  
Future Research ◽  
Therapeutic Effects ◽  
Long Term Effects ◽  
High Definition ◽  
Tinnitus Questionnaire ◽  
Temporal Area ◽  
Clinically Significant ◽  
The Right

Background. Contradictory results have been reported for transcranial direct current stimulation (tDCS) as treatment for tinnitus. The recently developed high-definition tDCS (HD tDCS) uses smaller electrodes to limit the excitation to the desired brain areas. Objective. The current study consisted of a retrospective part and a prospective part, aiming to compare 2 tDCS electrode placements and to explore effects of HD tDCS by matched pairs analyses. Methods. Two groups of 39 patients received tDCS of the dorsolateral prefrontal cortex (DLPFC) or tDCS of the right supraorbital–left temporal area (RSO-LTA). Therapeutic effects were assessed with the tinnitus functional index (TFI), a visual analogue scale (VAS) for tinnitus loudness, and the hyperacusis questionnaire (HQ) filled out at 3 visits: pretherapy, posttherapy, and follow-up. With a new group of patients and in a similar way, the effects of HD tDCS of the right DLPFC were assessed, with the tinnitus questionnaire (TQ) and the hospital anxiety and depression scale (HADS) added. Results. TFI total scores improved significantly after both tDCS and HD tDCS (DLPFC: P < .01; RSO-LTA: P < .01; HD tDCS: P = .05). In 32% of the patients, we observed a clinically significant improvement in TFI. The 2 tDCS groups and the HD tDCS group showed no differences on the evolution of outcomes over time (TFI: P = .16; HQ: P = .85; VAS: P = .20). Conclusions. TDCS and HD tDCS resulted in a clinically significant improvement in TFI in 32% of the patients, with the 3 stimulation positions having similar results. Future research should focus on long-term effects of electrical stimulation.

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