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  • Title: Simulation of a conductive shield plate for the focalization of transcranial magnetic stimulation in the rat.
    Author: Gasca F, Richter L, Schweikard A.
    Journal: Annu Int Conf IEEE Eng Med Biol Soc; 2010; 2010():1593-6. PubMed ID: 21096128.
    Abstract:
    Transcranial Magnetic Stimulation (TMS) in the rat is a powerful tool for investigating brain function. However, the state-of-the-art experiments are considerably limited because the stimulation usually affects undesired anatomical structures. A simulation of a conductive shield plate placed between the coil stimulator and the rat brain during TMS is presented. The Finite Element (FE) method is used to obtain the 3D electric field distribution on a four-layer rat head model. The simulations show that the shield plate with a circular window can improve the focalization of stimulation, as quantitatively seen by computing the three-dimensional half power region (HPR). Focalization with the shield plate showed a clear compromise with the attenuation of the induced field. The results suggest that the shield plate can work as a helpful tool for conducting TMS rat experiments on specific targets.
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