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Life
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Technical Innovations in Transcranial Electrical Stimulation
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Technical Innovations in Transcranial Electrical Stimulation

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Medical Research".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1347

Special Issue Editors

Dr. Alexander Hunold

E-Mail Website
Guest Editor
Technische Universität Ilmenau, Ehrenbergstraße 29, 98693 Ilmenau, Germany
Interests: transcranial electrical stimulation; current flow modeling; measurement and stimulation electrodes; volume conductor modeling ; electroencephalography, magnetoencephalography; state-dependent stimulation; closed-loop stimulation
Prof. Dr. Marcus Meinzer

E-Mail Website
Guest Editor
Director of the Cognition, Aging, and Brain Stimulation Lab, Department of Neurology, University Medicine Greifswald, Greifswald, Germany
Interests: human cognitive neuroscience; language; social cognition; learning; memory; executive functions; NIBS; fMRI; aging; stroke; dementia

Special Issue Information

Dear Colleagues,

Non-invasive transcranial electrical stimulation (tES) of human brain has shown promise in neuroscientific research and for the treatment of neuro-psychiatric diseases. In recent years, there have been significant advances in this field, including the development of novel stimulation protocols, improved electrode placement techniques, and the use of real-time neuroimaging to guide stimulation.

One of the most exciting developments in tES has been the development of focal stimulation approaches for transcranial direct or alternating current stimulation (tDCS and tACS, respectively). These techniques allow the current to be delivered to circumscribed brain regions, which makes it possible to target specific brain networks in experimental and clinical contexts.

Another promising novel use of tES involves closed-loop systems that adjust stimulation parameters in real-time based on the participants’ neural activity. This approach allows for personalized and adaptive stimulation that may enhance the effectiveness of current tES approaches.

Overall, recent advances in tES have the potential to substantially contribute to both basic and translational human neuroscience, including the treatment of neurological and psychiatric disorders. However, more research is needed to fully understand the underlying mechanisms of tES and to optimize its use in different populations.

In this Special Issue, we specifically want to highlight recent technical innovations involving tES, and will be accepting both original research and review contributions.

Dr. Alexander Hunold
Prof. Dr. Marcus Meinzer
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Life is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • cognitive neuroscience
  • rehabilitation
  • current flow modeling
  • state-dependent stimulation

Published Papers (2 papers)

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Research

16 pages, 1467 KiB  
Article
No Object–Location Memory Improvement through Focal Transcranial Direct Current Stimulation over the Right Temporoparietal Cortex
by Anna Elisabeth Fromm, Ulrike Grittner, Svenja Brodt, Agnes Flöel and Daria Antonenko
Life 2024, 14(5), 539; https://doi.org/10.3390/life14050539 - 23 Apr 2024
Viewed by 330
Abstract
Remembering objects and their associated location (object–location memory; OLM), is a fundamental cognitive function, mediated by cortical and subcortical brain regions. Previously, the combination of OLM training and transcranial direct current stimulation (tDCS) suggested beneficial effects, but the evidence remains heterogeneous. Here, we [...] Read more.
Remembering objects and their associated location (object–location memory; OLM), is a fundamental cognitive function, mediated by cortical and subcortical brain regions. Previously, the combination of OLM training and transcranial direct current stimulation (tDCS) suggested beneficial effects, but the evidence remains heterogeneous. Here, we applied focal tDCS over the right temporoparietal cortex in 52 participants during a two-day OLM training, with anodal tDCS (2 mA, 20 min) or sham (40 s) on the first day. The focal stimulation did not enhance OLM performance on either training day (stimulation effect: −0.09, 95%CI: [−0.19; 0.02], p = 0.08). Higher electric field magnitudes in the target region were not associated with individual performance benefits. Participants with content-related learning strategies showed slightly superior performance compared to participants with position-related strategies. Additionally, training gains were associated with individual verbal learning skills. Consequently, the lack of behavioral benefits through focal tDCS might be due to the involvement of different cognitive processes and brain regions, reflected by participant’s learning strategies. Future studies should evaluate whether other brain regions or memory-relevant networks may be involved in the modulation of object–location associations, investigating other target regions, and further exploring individualized stimulation parameters. Full article
(This article belongs to the Special Issue Technical Innovations in Transcranial Electrical Stimulation)
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16 pages, 1682 KiB  
Article
Predicting Online Behavioural Responses to Transcranial Direct Current Stimulation in Stroke Patients with Anomia
by Thomas M. H. Hope, Sasha Ondobaka, Haya Akkad, Davide Nardo, Katerina Pappa, Cathy J. Price, Alexander P. Leff and Jennifer T. Crinion
Life 2024, 14(3), 331; https://doi.org/10.3390/life14030331 - 01 Mar 2024
Viewed by 738
Abstract
Anomia, or difficulty naming common objects, is the most common, acquired impairment of language. Effective therapeutic interventions for anomia typically involve massed practice at high doses. This requires significant investment from patients and therapists. Aphasia researchers have increasingly looked to neurostimulation to accelerate [...] Read more.
Anomia, or difficulty naming common objects, is the most common, acquired impairment of language. Effective therapeutic interventions for anomia typically involve massed practice at high doses. This requires significant investment from patients and therapists. Aphasia researchers have increasingly looked to neurostimulation to accelerate these treatment effects, but the evidence behind this intervention is sparse and inconsistent. Here, we hypothesised that group-level neurostimulation effects might belie a more systematic structure at the individual level. We sought to test the hypothesis by attempting to predict the immediate (online), individual-level behavioural effects of anodal and sham neurostimulation in 36 chronic patients with anomia, performing naming and size judgement tasks. Using clinical, (pre-stimulation) behavioural and MRI data, as well as Partial Least Squares regression, we attempted to predict neurostimulation effects on accuracies and reaction times of both tasks. Model performance was assessed via cross-validation. Predictive performances were compared to that of a null model, which predicted the mean neurostimulation effects for all patients. Models derived from pre-stimulation data consistently outperformed the null model when predicting neurostimulation effects on both tasks’ performance. Notably, we could predict behavioural declines just as well as improvements. In conclusion, inter-patient variation in online responses to neurostimulation is, to some extent, systematic and predictable. Since declines in performance were just as predictable as improvements, the behavioural effects of neurostimulation in patients with anomia are unlikely to be driven by placebo effects. However, the online effect of the intervention appears to be as likely to interfere with task performance as to improve it. Full article
(This article belongs to the Special Issue Technical Innovations in Transcranial Electrical Stimulation)
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