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Brain, Current density, Surface reconstruction, Biomagnetics, Data analysis, Magnetic analysis, Inverse problems, Magnetic field measurement, Music, Fingers
Abstract:
Brain surface current density reconstructions are widely used to analyze magnetoencephalographic data arising from electrical activity in the human brain. Commonly, this mapping is performed in single subjects. We present a methodology to apply brain surface current density mapping to group studies. The technique includes stepwise transformation of the magnetic sensors into a standard sensor system and linear scaling of individual heads in Talairach space. We demonstrate the usefulness of the technique with a comparison of the motor activation in pianists and non-pianists while listening to piano pieces.