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Serotonin and impulsive behaviours

Research suggests patience - along with impulse control - can be linked to specific neurological systems.

A previous study showed a possible link between a lack of serotonin receptors in the brain and impulsive behaviours. Another study went further by researching the role of the DRN (dorsal raphe nucleus) in the brain that contains serotonin-releasing neurons. During this study, they found a casual relationship serotonin has on the DRN region and the patience for anticipated rewards.

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created an idea from a article:

BIGTHINK

Serotonin plays a key role in patience and impulse control, research says

bigthink.com

Brain areas that impact patience and impulse control

NAc - nucleus accumbens, a key region that mediates a variety of behaviors, like reward and satisfaction.
OFC - orbitofrontal cortex is considered to have a role in higher-order thinking.
mPFC - medial prefrontal cortex is also suggested to mediate decision-making.