What is the role of brain structure on your personality?
Does brain structure and personality related to each other? In the past decades, neuroscience has been interested in this question. It was suspected that brain structures have been influencing personality. However, results from previous studies are not conclusive.
To test such assumption, Roberta Riccelli, Nicola Toschi, Salvatore Nigro, Antonio Terracciano and Luca Passamonti designed a study. Their study involved more than 500 healthy participants. MRI Scanning was done to examine their participants’ brain structure. The “Big Five” on the other hand was administered to determine participants’ personality.
Big Five is comprised of five personality factors such as;
Openness – involves being widely interested on new information, imaginative and insightful.
Conscientiousness – includes traits such as being organized, and goal oriented.
Extraversion – a trait that involves being sociable, talkative and assertive.
Agreableness – a trait that involves being kind and affectionate.
Neuroticism – a trait that includes being moody and anxious.
Personality and Brain Structure
The result suggests that personality factors were associated with the brain’s structure. Generally the association was noted between personality factors and thickness of the cortical regions of the brain.
In addition, different personality factors were found to have significant association with different areas in the cortex.
“They discovered all the extroverted participants had significantly larger medial orbitofrontal cortex, located on the frontal lobe above and behind the eyes. The conscientious ones had a bigger lateral prefrontal cortex; this part of our brain gets involved when we set a goal for ourselves or obey rules. The brains of the neurotics in the group showed smaller volumes in dorsomedial prefrontal cortex among other characteristics. Overall, the brain regions impacted are those responsible for negative emotions in the neurotics.”
What these studies suggest? The most important implication of the previous studies is that our personality is somewhat related to the structure of our brain.
If so, then our personality- the way we interact the world around us maybe predetermined. It helps us understand our own behavioral tendencies. The more important question here though is whether or not we can somehow make a change on our brain by changing our behavior.
If it’s possible to impact change on our brain from outside, how long will it take?
What do you think? Feel free to leave your comment below.