Activation of brain region can change a monkey's choice

Artificially stimulating a brain region believed to play a key role in learning, reward and motivation induced monkeys to change which of two images they choose to look at. In experiments reported online in the journal Current Biology, researchers from Massachusetts General Hospital (MGH) and the University of Leuven in Belgium confirm for the first time that stimulation of the ventral tegmental area (VTA) – a group of neurons at the base of the midbrain – can change behavior through activation of the brain's reward system.

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