Scanning their brains using functional magnetic resonance imaging, the scientists found that a region involved in language processing - the temporal lobe, part of the prefrontal cortex - was activated during verbal learning in rested patients.

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There is also a possibility of functional collapse of grids beyond the exposed area, as electrical effects propagate from one region to another.

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Using functional brain imaging, researchers have found that ambiguity in choices activates the amygdale, the region in our brain that also gets triggered by fear or threat, while at the same time it leads to decreased activity in the striatal system, which responds to potential rewards.

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