Transcranial magnetic stimulation coil with electronically switchable active and sham modes.
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
Altmetric Attention Stats
Dimensions Citation Stats
Published In
DOI
EISSN
Publication Date
Volume
Start / End Page
Location
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
Published In
DOI
EISSN
Publication Date
Volume
Start / End Page
Location
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