Furthermore, as shown with neuroimaging, when contemplating mouthwash versus soap, those who had just spoken a lie activated parts of the sensorimotor cortex related to the mouth {i.e., the subjects were more aware of their mouths at the time}; those who had written the lie activated the cortical regions mapping onto their hand.
( Robert M. Sapolsky )
[ Behave: The Biology of Humans ]
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