Magnetic stimulation coil and circuit design

Davey, K.R.; Epstein, Charles M.

doi:10.1109/10.880101

Cited by 76 publications

(48 citation statements)

References 5 publications

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“…The polarity change might cause a sequence of hyperpolarization and depolarization recruiting more sodium channels compared to a pure depolarization (Maccabee et al, 1998). Alternatively, optimal neuronal responses might depend on the duration of the induced current in its optimal orientation (Maccabee et al, 1998;Davey and Epstein, 2000).…”

Section: Discussionmentioning

confidence: 99%

Phosphene thresholds evoked with single and double TMS pulses

Kammer

Baumann

2010

Clinical Neurophysiology

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Section: Discussionmentioning

confidence: 99%

Phosphene thresholds evoked with single and double TMS pulses

Kammer

Baumann

2010

Clinical Neurophysiology

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“…A core is a very effective way of increasing the magnetic flux. There are several examples in the literature of ferrite and iron cores used for clinical magnetic stimulation [51,[67][68][69][70][71] and in vitro experimentation [51,70,[72][73][74][75]. An alternate method of including a core is in [69] where FEA simulation showed a 50% increase by incorporating a cylindrical plate twice the thickness and 30% larger than the coil diameter.…”

Section: Corementioning

confidence: 99%

“…Both of these sources present relatively detailed circuit schematics and application notes. Overviews of magnetic stimulation system design are presented in [68,88].…”

Section: Systems For Magnetic Stimulationmentioning

confidence: 99%

Magnetic Stimulation of Neural Tissue: Techniques and System Design

Basham

Yang²,

Tchemodanov³

et al. 2009

Biological and Medical Physics, Biomedical Engineering

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Magnetic stimulation of neural tissue is an attractive technology because neural excitation may be affected without the implantation of electrodes. This chapter provides a brief overview of the technology and relevant literature. While extensive magnetic stimulation modeling and clinical experimentation work has been presented, considerably less quantitative in vitro work has been performed. In vitro experiments are critical for characterizing the site of action, the structures stimulated, and the long-term tissue histological effects. In vitro systems may also facilitate the development of novel magnetic stimulation approaches. To demystify magnetic stimulation systems, this chapter presents an in vitro experimental system using a systematic design methodology. The modeling methods are designed to aid experimentation. Circuit schematics, test rigs, and supplier information are given to support practical implementation of this design methodology. Example neural preparations and their modeling and use are also covered. Finally, as an alternative to pulsed discharge circuits for magnetic stimulation, this chapter shows how to use a circuit to deliver asymmetric current pulses to generate the magnetic field.

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“…The higher the magnitude of the E field, the higher the current passing through the biological medium, leading to a more effective neural stimulation and hence, MRC is a very promising technique for neural stimulation using MRC. However, from existing related studies, there is lack of a comparative study of MRC and traditional electric or magnetic based neural stimulation techniques which are magnetic stimulation (MS) [3][4][5][6][7][8][9][10][11] and transcutaneous electrical nerve stimulation (TENS). [12][13][14] In these existing techniques, MS applies a magnetic coil, which is conducting a high magnitude of current with a low frequency of 1 -10 kHz, to induce electric field in the biological medium which stimulates the nerve at the target.…”

Section: Introductionmentioning

confidence: 99%

Comparing the magnetic resonant coupling radiofrequency stimulation to the traditional approaches: Ex-vivo tissue voltage measurement and electromagnetic simulation analysis

et al. 2015

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Recently, the design concept of magnetic resonant coupling has been adapted to electromagnetic therapy applications such as non-invasive radiofrequency (RF) stimulation. This technique can significantly increase the electric field radiated from the magnetic coil at the stimulation target, and hence enhancing the current flowing through the nerve, thus enabling stimulation. In this paper, the developed magnetic resonant coupling (MRC) stimulation, magnetic stimulation (MS) and transcutaneous electrical nerve stimulation (TENS) are compared. The differences between the MRC RF stimulation and other techniques are presented in terms of the operating mechanism, ex-vivo tissue voltage measurement and electromagnetic simulation analysis. The evvivo tissue voltage measurement experiment is performed on the compared devices based on measuring the voltage induced by electromagnetic induction at the tissue. The focusing effect, E field and voltage induced across the tissue, and the attenuation due to the increase of separation between the coil and the target are analyzed. The electromagnetic stimulation will also be performed to obtain the electric field and magnetic field distribution around the biological medium. The electric field intensity is proportional to the induced current and the magnetic field is corresponding to the electromagnetic induction across the biological medium. The comparison between the MRC RF stimulator and the MS and TENS devices revealed that the MRC RF stimulator has several advantages over the others for the applications of inducing current in the biological medium for stimulation purposes. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

show abstract

Magnetic stimulation coil and circuit design

Cited by 76 publications

References 5 publications

Phosphene thresholds evoked with single and double TMS pulses

Phosphene thresholds evoked with single and double TMS pulses

Magnetic Stimulation of Neural Tissue: Techniques and System Design

Comparing the magnetic resonant coupling radiofrequency stimulation to the traditional approaches: Ex-vivo tissue voltage measurement and electromagnetic simulation analysis

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