Final answer:
Neuroimaging data suggests increased activity in the amygdala is associated with the personality trait of neuroticism.
Step-by-step explanation:
Neuroimaging data exploring the personality trait of neuroticism has found that there is increased activity in the amygdala, rather than increased brain volume, decreased activity in the amygdala, altered serotonin levels, or enhanced prefrontal cortex function. According to Siegle et al. (2007), this increase in amygdala activity is related and independent of features in unipolar depression. People with high neuroticism are prone to experiencing negative emotions, and the amygdala plays a crucial role in processing these emotions.
Neuroimaging studies, such as those involving functional magnetic resonance imaging (fMRI), have shown hyperactivity in the amygdala in individuals with higher levels of neuroticism. This is consistent with findings that the amygdala is more reactive in people with mood and anxiety disorders, suggesting that a more active amygdala is a neural correlate of neuroticism.