An Efficient 3-D Eddy-Current Solver Using an Independent Impedance Method for Transcranial Magnetic Stimulation

2011 ◽  
Vol 58 (2) ◽  
pp. 310-320 ◽  
Author(s):  
Nele De Geeter ◽  
Guillaume Crevecoeur ◽  
Luc Dupre
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Eddy Current ◽  
Magnetic Stimulation ◽  
Impedance Method

scholarly journals Comparison of Induced Fields in Virtual Human and Rat Heads by Transcranial Magnetic Stimulation

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Ya-Wen Lu ◽  
Mai Lu
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Animal Studies ◽  
Brain Research ◽  
Three Dimensional ◽  
Virtual Human ◽  
Impedance Method ◽  
Magnetic Flux Density ◽  
Biological Mechanisms ◽  
First Time

Transcranial magnetic stimulation (TMS) shows significant values in both brain research and therapeutic applications of cognitive neuroscience, neurophysiology, and psychiatry. Animal studies of TMS provide a potential way for learning the biological mechanisms of actions of TMS. In this paper, we presented the comparison of human TMS and rat TMS by using the conventional figure-of-eight coil for the first time. Three-dimensional distributions of magnetic flux density and induced electric field in both virtual human and rat heads were obtained through the 3D impedance method. The results indicated that smaller TMS coils are needed for stimulation of the rat brain. A rat-specific figure-of-eight coil was designed by considering the coil radii, number of coil turns, and the injected coil currents. We found that the numerically designed Fo8 coil can be applied to the rat TMS with improved focality while also keeping high stimulation intensities.

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