Reduced Current Spread by Concentric Electrodes in Transcranial Electrical Stimulation (tES)

Claudia Rodella, Carlo Miniussi, M. Bortoletto, C. Rodella, R. Salvador, P. C. Miranda, C. Miniussi

Risultato della ricerca: Contributo in rivistaArticolo in rivista

35 Citazioni (Scopus)

Abstract

Objective We propose the use of a new montage for transcranial direct current stimulation (tDCS), called concentric electrodes tDCS (CE-tDCS), involving two concentric round electrodes that may improve stimulation focality. Methods To test efficacy and focality of CE-tDCS, we modelled the current distribution and tested physiological effects on cortical excitability. Motor evoked potentials (MEPs) from first dorsal interosseous (FDI) and abductor digiti minimi (ADM) were recorded before and after the delivery of anodal, cathodal and sham stimulation on the FDI hotspot for 10 minutes. Results MEP amplitude of FDI increased after anodal-tDCS and decreased after cathodal-tDCS, supporting the efficacy of CE-tDCS in modulating cortical excitability. Moreover, modelled current distribution and no significant effects of stimulation on MEP amplitude of ADM suggest high focality of CE-tDCS. Conclusions CE-tDCS may allow a better control of current distribution and may represent a novel tool for applying tDCS and other transcranial current stimulation approaches.
Lingua originaleEnglish
pagine (da-a)525-528
Numero di pagine4
RivistaBrain Stimulation
Volume9
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • Adult
  • Electric field
  • Electrode shape
  • Electrodes
  • Evoked Potentials, Motor
  • Female
  • Focality
  • Humans
  • Male
  • Modelling
  • Motor Cortex
  • Motor cortex
  • Motor evoked potentials
  • Transcranial Direct Current Stimulation
  • Transcranial direct current stimulation
  • Young Adult
  • tDCS
  • tES montage

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