Brain imaging studies of the Big Five personality traits have found that extraversion is associated with larger brain tissue volume in the medial or bitofrontal cortex, a brain region thatis associated with sensitivity to rewarding stimuli.

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Brain imaging studies have indeed found a positive correlation between extraversion and larger brain tissue volume in the medial or bitofrontal cortex, which is associated with sensitivity to rewarding stimuli.

Brain Imaging Studies of the Big Five Personality Traits Have