Everyday, people are required to make decisions quickly and flexibly. In a flash, they must weigh up the advantages, disadvantages and possible consequences of their behaviour and coordinate it with the relevant external circumstances. This learning process involves the messenger substance dopamine. Decisions that are perceived as positive and are followed by a reward trigger the increased release of dopamine and are recorded by the brain as beneficial. Researchers at the Max Planck Institute for Human Development have now discovered an enzyme variant that promotes fast and flexible decision-making behaviour.
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