Calculating the induced electromagnetic fields in real human head by deep transcranial magnetic stimulation.

Abstract

Stimulation of deeper brain structures by transcranial magnetic stimulation (TMS) may be beneficial in the treatment of several neurological and psychiatric disorders. This paper presents numerical simulation of deep transcranial magnetic stimulation (dTMS) by considering double cone, H-and Halo coils. Three-dimensional distributions of the induced fields i.e. magnetic flux density, current density and electric fields in realistic head model by dTMS coils were calculated by impedance method and the results were compared with that of figure-of-eight coil. It was found that double cone and H-coils have significantly deep field penetration at the expense of induced higher and wider spread electrical fields in superficial cortical regions. The Halo coil working with a circular coil carrying currents in opposite directions provides a flexible way to stimulate deep brain structures with much lower stimulation in superficial brain tissues.

• Authors: Mai Lu, Shoogo Ueno
• Journal: Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference (Annu Int Conf IEEE Eng Med Biol Soc) Vol. 2013 Pg. 795-8 ( 2013) ISSN: 2694-0604 [Electronic] United States
• PMID: 24109807 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Electric Impedance
• Electromagnetic Fields
• Equipment Design
• Head
• Humans
• Models, Anatomic
• Transcranial Magnetic Stimulation (methods)