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Updated: Jun 7, 2026

External Excitation of Neurons Using Electric and Magnetic Fields in One- and Two-dimensional Cultures
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Comparing cutaneous perception induced by electrical stimulation using rectangular and round shaped electrodes.

Géza Gergely Ambrus1, Andrea Antal, Walter Paulus

  • 1Department of Clinical Neurophysiology, Georg-August University of Göttingen, 37075 Göttingen, Germany. g.ambrus@gmail.com

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|October 29, 2010
PubMed
Summary
This summary is machine-generated.

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Electrode shape does not impact skin perception during transcranial direct current stimulation (tDCS) or transcranial random noise stimulation (tRNS). Round and rectangular electrodes show similar blinding potential, making shape changes unnecessary for future studies.

Area of Science:

  • Neuroscience
  • Biomedical Engineering

Background:

  • Transcranial electrical stimulation methods like tDCS and tRNS are used in neuroscience research.
  • Electrode geometry may influence the perception of stimulation, potentially affecting study blinding.

Purpose of the Study:

  • To compare skin perception differences between round and rectangular electrode configurations for tDCS and tRNS.
  • To determine if electrode shape impacts blinding effectiveness in neuromodulation studies.

Main Methods:

  • Twelve subjects underwent testing with both round and rectangular electrodes.
  • Stimulation intensities ranged from 200 to 2000 μA for tDCS and tRNS.
  • Perception characteristics including detection thresholds and rates were analyzed.

Main Results:

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  • No significant differences were observed in detection thresholds between electrode shapes.
  • Detection rates and false positive rates were comparable for round and rectangular electrodes.
  • No consistent alterations in perceived stimulation sites were found.

Conclusions:

  • Electrode geometry (round vs. rectangular) does not affect blinding potential in tDCS and tRNS.
  • Altering electrode shape to round is not warranted for improving blinding in future neuromodulation research.