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If you magnetise a part of the brain you can make it really tired. Magnetise the posterior medial frontal cortex, at the front not far from the surface and it dampens responses to attitudes like one's belief in religion and negative responses to immigrants. Dr Colin Holbrook of the University of California told us more. (Picture: Credit Dr. Marco Iacoboni, Director, Neuromodulation Lab, Ahmanson-Lovelace Brain Mapping Center at UCLA)