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Abstract #0515

In-vivo Evidence of transcranial Direct Current Stimulation (tDCS) induced magnetic-field changes in Human Brain revealed by MRI

Mayank V Jog 1 , Robert Smith 2 , Kay Jann 2 , Walter Dunn 3 , Allan Wu 2 , and Danny JJ Wang 2

1 Biomedical Engineering, University of California Los Angeles, Los Angeles, California, United States, 2 Neurology, University of California Los Angeles, Los Angeles, California, United States, 3 Psychiatry, University of California Los Angeles, Los Angeles, California, United States

Transcranial Direct Current Stimulation (tDCS) is a neuromodulation technique that affects cortical excitability. tDCS has been shown to help with depression, stroke and cognition. Simulations have shown that the direct current can penetrate into the brain parenchyma, especially in the vicinity of the electrodes. Based on Amperes Law, we used MRI field mapping to visualize the current induced magnetic field changes in 12 healthy participants and observed in-vivo evidence of the effects of tDCS penetrating through to cortical and sub-cortical regions.

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