Research has shown that frequent liars tend to have different prefrontal cortexes compared to individuals who do not lie as much. The prefrontal cortex is the part of the brain that is involved in decision-making, impulse control, and social behavior.

Studies have found that individuals who frequently lie tend to have a smaller prefrontal cortex, particularly in the ventromedial prefrontal cortex (vmPFC) and the dorsolateral prefrontal cortex (dlPFC). These regions are important for regulating emotions and controlling impulsive behavior.

In addition, frequent liars also show differences in the white matter connectivity between the prefrontal cortex and other brain regions. This altered connectivity may contribute to their propensity to lie.

It is important to note, however, that the relationship between brain structure and lying behavior is complex, and there may be other factors at play. While some studies have found a link between prefrontal cortex structure and lying behavior, other studies have found no significant differences. Additionally, there are many factors that can contribute to lying behavior, such as personality traits, environmental factors, and past experiences.

© Linda C J Turner