(Sketch) Solipsistic < ---- > Autistic (relation with the self) VS ( Empathic <-

(Sketch)

Solipsistic < —- > Autistic (relation with the self)

VS

(

Empathic <——> Sociopathic (relation to others)

AND

Submissive <—-> Dominant

)

The desire for stimulation remains constant.

The formation of higher brain areas exhibits variability.

Brain structures

Important research on personality traits and brain structures have been conducted, providing correlations between the Big Five personality traits and specific areas of the brain.

Some research has been done to look into the structures of the brain and their connections to personality traits of the FFM. Two main studies were done by Sato et al. (2012)[67] and DeYoung et al. (2009).[68] Results of the two are as follows:

Neuroticism: negatively correlated with ratio of brain volume to remainder of intracranial volume, reduced volume in dorsomedial PFC and a segment of left medial temporal lobe including posterior hippocampus, increased volume in the mid-cingulate gryus.

Extraversion: positively correlated with orbitofrontal cortex metabolism, increased cerebral, volume of medial orbitofrontal cortex.

Agreeableness: negatively correlated with left orbitofrontal lobe volume in frontotemporal dementia patients, reduced volume in posterior left superior temporal sulcus, increased volume in posterior cingulate cortex.

Conscientiousness: volume of middle frontal gyrus in left lateral PFC.

Openness to experience: No regions large enough to be significant, although parietal cortex may be involved.