Sham Transcranial Magnetic Stimulation Using Electrical Stimulation of the Scalp.
This study describes development and validation of a sham rTMS approach that combines a matched sham coil (for look/sound) with scalp electrical stimulation (for sensation). In back-to-back comparisons, TMS-naïve participants reportedly could not tell active from sham, whereas experienced participants could. The authors conclude the method is suitable for double-blind crossover studies at 1 Hz without producing a significant magnetic field.
Key points
- The paper focuses on improving sham control conditions for repetitive transcranial magnetic stimulation studies.
- A matched, air-cooled sham coil was used to replicate the appearance and sound of active rTMS.
- Electrical stimulation via scalp electrodes was used to mimic scalp muscle sensations associated with rTMS.
- TMS-naïve subjects reportedly could not distinguish active from sham stimulation in comparisons.
- Naïve subjects sometimes judged sham as active because the electrical sensation felt more focused.
- Participants experienced with TMS could correctly identify sham versus active stimulation.
- Experimenters could detect subtle differences between sham and active conditions.
Referenced studies & papers
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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