A study of magnetic stimulation method of targeting a base of brain- Development of an intraoral coil and its angle dependency -

Abstract

Magnetic stimulation to a base of brain may become effective therapy for the treatment of Alzheimer's disease. In this study as basic experiment, we designed and made an intraoral coil to stimulate a base of brain from the oral cavity which is near to a base of brain. In the design, the size of the coil was optimized so that magnetic flux density was as large as possible. We measured magnetic flux density of various coil angle at the position that is assumed to be a base of brain. As a result, the magnetic flux density at the base of brain showed a maximum when the coil angle was about 35-40 deg. Additionally, we conducted a numerical analysis of the head model. The magnetic flux density showed a maximum when the coil angle was about 35-40 deg. We evaluated the induced current density at the base of brain.