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Charlet de Sauvage R, Beuter A, Lagroye I, Veyret B. Design and Construction of a Portable Transcranial Magnetic Stimulation (TMS) Apparatus for Migraine Treatment. J Med Device 2010. [DOI: 10.1115/1.4000616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
A portable transcranial magnetic stimulation (TMS) prototype was designed and constructed for use in clinical trials to manage the pain associated with migraine with aura. In this system, a half-sinusoid (optionally a full-sine) TMS pulse is delivered into a circular coil. The pulse triggering is controlled by a switch in the coil handle. The pulse intensity and polarity are adjustable. Measured pulse parameters (period ≃202 μs, maximum magnetic field at coil center ≃0.7 T) corresponded to expected values and were in the range described for commercially available TMS apparatus. The maximum current density, computed 3 cm below the coil using a simple model of brain anatomy, was approximately 1.9 times the motor threshold, thus ensuring a sufficient margin for reaching the neuronal threshold in the target area.
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Affiliation(s)
- Renaud Charlet de Sauvage
- University of Bordeaux 1, IMS, Site ENSCPB, UMR CNRS 5218, 16, Avenue Pey Berland, 33607, Pessac Cedex, France
| | - Anne Beuter
- University of Bordeaux 1, IMS, Site ENSCPB, UMR CNRS 5218, 16, Avenue Pey Berland, 33607, Pessac Cedex, France
| | - Isabelle Lagroye
- University of Bordeaux 1, IMS, Site ENSCPB, UMR CNRS 5218, 16, Avenue Pey Berland, 33607, Pessac Cedex, France
| | - Bernard Veyret
- University of Bordeaux 1, IMS, Site ENSCPB, UMR CNRS 5218, 16, Avenue Pey Berland, 33607, Pessac Cedex, France
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de Sauvage RC, Lagroye I, Billaudel B, Veyret B. Evaluation of the potential genotoxic effects of rTMS on the rat brain and current density mapping. Clin Neurophysiol 2008; 119:482-91. [DOI: 10.1016/j.clinph.2007.09.137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 09/21/2007] [Accepted: 09/24/2007] [Indexed: 10/22/2022]
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