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Transcranial magnetic stimulation coil with electronically switchable active and sham modes.

Publication ,  Journal Article
Deng, Z-D; Peterchev, AV
Published in: Annu Int Conf IEEE Eng Med Biol Soc
2011
Published version (DOI) Link to item

Blinded studies with transcranial magnetic stimulation (TMS) require a valid sham condition. A wide range of sham approaches have been implemented but they have various limitations including residual electric field in the brain, inadequate reproduction of auditory and cutaneous sensations, and/or need for electrical stimulation with scalp electrodes. We propose a quadrupole TMS coil configuration that can be electronically switched between active and sham modes. In active mode, the quadrupole coil has electric field characteristics similar to a conventional figure-8 coil. In sham mode, the quadrupole coil compared to the reverse-current sham figure-8 coil has 50% less electric field penetration depth, is 97% more focal, produces 35% less intense field in the brain, and induces scalp electric field characteristics closer to those of active TMS.

Duke Scholars

Angel V Peterchev
Author Angel V Peterchev Psychiatry & Behavioral Sciences, Behavioral Medicine & Neur ...
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Published In

Annu Int Conf IEEE Eng Med Biol Soc

DOI

10.1109/IEMBS.2011.6090561

EISSN

2694-0604

Publication Date

2011

Volume

2011

Start / End Page

1993 / 1996

Location

United States

Related Subject Headings

  • Transcranial Magnetic Stimulation
  • Signal Processing, Computer-Assisted
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Equipment Failure Analysis
  • Equipment Design
  • Electronics, Medical
  • Computer-Aided Design
 

Citation

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Deng, Z.-D., & Peterchev, A. V. (2011). Transcranial magnetic stimulation coil with electronically switchable active and sham modes. Annu Int Conf IEEE Eng Med Biol Soc, 2011, 1993–1996. https://doi.org/10.1109/IEMBS.2011.6090561
Deng, Zhi-De, and Angel V. Peterchev. “Transcranial magnetic stimulation coil with electronically switchable active and sham modes.” Annu Int Conf IEEE Eng Med Biol Soc 2011 (2011): 1993–96. https://doi.org/10.1109/IEMBS.2011.6090561.
Deng Z-D, Peterchev AV. Transcranial magnetic stimulation coil with electronically switchable active and sham modes. Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:1993–6.
Deng, Zhi-De, and Angel V. Peterchev. “Transcranial magnetic stimulation coil with electronically switchable active and sham modes.” Annu Int Conf IEEE Eng Med Biol Soc, vol. 2011, 2011, pp. 1993–96. Pubmed, doi:10.1109/IEMBS.2011.6090561.
Deng Z-D, Peterchev AV. Transcranial magnetic stimulation coil with electronically switchable active and sham modes. Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:1993–1996.

Published In

Annu Int Conf IEEE Eng Med Biol Soc

DOI

10.1109/IEMBS.2011.6090561

EISSN

2694-0604

Publication Date

2011

Volume

2011

Start / End Page

1993 / 1996

Location

United States

Related Subject Headings

  • Transcranial Magnetic Stimulation
  • Signal Processing, Computer-Assisted
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Equipment Failure Analysis
  • Equipment Design
  • Electronics, Medical
  • Computer-Aided Design