A novel coil design for magnetic nerve stimulation

Al-Mutawaly, Nafia; Findlay, R.D.

doi:10.1109/ccece.1998.685585

Cited by 7 publications

(5 citation statements)

References 54 publications

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“…The use of the ferromagnetic material enhances the field delivered by the stimulating coil to the targeted area. These findings agree with our previous findings [15,16] and with the results presented by Davey et al [14] and their suggestion in using a partial toroid as a core for their stimulating coil. However, the unique design proposed in this study for the core geometry adapts and controls the flux lines produced by the coil and consequently improves its performance.…”

Section: Discussionsupporting

confidence: 94%

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Magnetic Nerve Stimulation: Field Focality and Depth of Penetration

Al-Mutawaly¹,

Bruin²,

Findlay³

2001

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Section: Discussionsupporting

confidence: 94%

“…A detailed description for the coils hardware (coil core material and geometry, coil conductor layout and number of turns) is covered in [11]. …”

Section: The Proposed Coilsmentioning

confidence: 99%

Magnetic Nerve Stimulation: Field Focality and Depth of Penetration

Al-Mutawaly¹,

Bruin²,

Findlay³

2001

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“…Well known examples for such materials are ferromagnetic iron, cobalt, nickel as well as a number of compounds, ferrimagnetics (also known as ferrites), and rarely antiferromagnetics (Jiles, 2016). Academic devices as well as commercial systems showed that the appropriate use of magnetic core material allows more flexible shaping of the magnetic field as well as a reduction of the required pulse current in the coil to achieve the same field as air coils (Al-Mutawaly & Findlay, 1998; Davey & Epstein, 2000; Davey & Riehl, 2005; Deng, et al, 2008; Epstein & Davey, 1994; Epstein & Davey, 2002; Lorenzen & Weyh, 1992; Salvador, Miranda, Roth, & Zangen, 2007 ). Most designs use a C-shaped core (Fig.…”

Section: What Are the Major Developments In Tms Technology?mentioning

confidence: 99%

“…In the theoretical model proposed by Rush and Driscoll (Rush & Driscoll, 1968), the head was modeled as three conducting concentric spherical shells consisting of the scalp, skull, and brain tissue. Each shell is considered as homogeneous with a dielectric property of the tissue it represents (Al-Mutawaly & Findlay, 1998; Deng, et al, 2013; Deng, Lisanby, & Peterchev, 2015; Deng, et al, 2008; Miranda, Lomarev, & Hallett, 2006; Ravazzani, Ruohonen, Grandori, & Tognola, 1996). With increasing computational power, progress in brain imaging, and available software tools, spherical head models were replaced by still idealized imaging-based head models (Fig.…”

Section: Models Of the Induced Electric Field Distributionmentioning

confidence: 99%

The development and modelling of devices and paradigms for transcranial magnetic stimulation

Goetz

Deng

2017

International Review of Psychiatry

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Magnetic stimulation is a noninvasive neurostimulation technique that can evoke action potentials and modulate neural circuits through induced electric fields. Biophysical models of magnetic stimulation have become a major driver for technological developments and the understanding of the mechanisms of magnetic neurostimulation and neuromodulation. Major technological developments involve stimulation coils with different spatial characteristics and pulse sources to control the pulse waveform. While early technological developments were the result of manual design and invention processes, there is a trend in both stimulation coil and pulse source design to mathematically optimize parameters with the help of computational models. To date, macroscopically highly realistic spatial models of the brain as well as peripheral targets, and user-friendly software packages enable researchers and practitioners to simulate the treatment-specific and induced electric field distribution in the brains of individual subjects and patients. Neuron models further introduce the microscopic level of neural activation to understand the influence of activation dynamics in response to different pulse shapes. A number of models that were designed for online calibration to extract otherwise covert information and biomarkers from the neural system recently form a third branch of modeling.

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“…In previous work we proposed two types of stimulating coils with the objective of improving the coil performance [1]. To evaluate and compare the proposed coils with Figure-8 coils (the type commonly used in clinical and experimental applications) a magnetic stimulator system was built.…”

Section: System Design: General Considerationsmentioning

confidence: 99%

Designing and Constructing a Magnetic Stimulator: Theoretical and Practical Considerations

Al-Mutawaly¹,

Bruin²

2001

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Subject Terms Report Classification unclassified Classification of this page unclassified Classification of Abstract unclassified Limitation of Abstract UU Number of Pages DESIGNING AND CONSTRUCTING A MAGNETIC STIMULATOR: THEORETICAL AND PRACTICAL CONSIDERATIONSAbstract -Magnetic nerve stimulation has proven to be an effective non-invasive technique that can be used to excite peripheral and central nervous systems. In this technique, the excitement of the neural tissue depends on exposing the body to a transient magnetic field. This field can be generated by passing a high pulse of current through a coil over a short period of time. This paper presents general guidelines for designing and constructing a magnetic stimulator. These guidelines cover theoretical concepts, hardware aspects and components required to build these systems. The critical points discussed in this paper are based on key findings and difficulties encountered during the process of building the system used for this study. Furthermore, some suggestions were addressed to improve future designs.

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A novel coil design for magnetic nerve stimulation

Cited by 7 publications

References 54 publications

Magnetic Nerve Stimulation: Field Focality and Depth of Penetration

Magnetic Nerve Stimulation: Field Focality and Depth of Penetration

The development and modelling of devices and paradigms for transcranial magnetic stimulation

Designing and Constructing a Magnetic Stimulator: Theoretical and Practical Considerations

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