Title :
Intensity and Localization of Eddy Currents in Transcranial Magnetic Stimulation to the Cerebellum
Author :
Sekino, Masaki ; Hirata, Masayuki ; Sakihara, Kotoe ; Yorifuji, Shiro ; Ueno, Shoogo
Author_Institution :
Dept. of Biomed. Eng., Univ. of Tokyo
Abstract :
We performed numerical simulations of the eddy current induced by transcranial magnetic stimulation (TMS) to the cerebellum. Solutions were obtained on a three-dimensional human head model with inhomogeneous conductivity. The stimulating coil consisted of a pair of circular coil elements with a diameter of 110 mm. Electric current applied to the coil had an intensity of 44.2 kA middot Turn, which resulted in a magnetic field intensity of 0.56 T at the center of a coil element. The maximum current density in the cerebellum was 2.9 A/m2. Distribution of the eddy current in the cerebellum was limited to approximately 1 cm beneath the surface of the cerebellum. The eddy current had a localized distribution in the cerebellum, while the magnetic field had a broad distribution
Keywords :
biomagnetism; brain; eddy currents; magnetic fields; 110 nm; 3D human head model; cerebellum; eddy currents; magnetic field intensity; transcranial magnetic stimulation; Brain modeling; Coils; Conductivity; Eddy currents; Humans; Magnetic fields; Magnetic heads; Magnetic stimulation; Nonuniform electric fields; Numerical simulation; Cerebellum; eddy current; finite-element method; transcranial magnetic stimulation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879821