Study links personality to prefrontal cortex genes
Updated
Updated · BBC.com · May 2
Study links personality to prefrontal cortex genes
5 articles · Updated · BBC.com · May 2
The peer-reviewed research finds all Big Five traits except agreeableness are enriched in genes expressed in the brain region tied to planning and decision-making.
It also suggests dopaminergic neurons are not among the most enriched cell types, potentially challenging theories that give dopamine an outsized role in extraversion and openness.
The findings add to evidence that personality is shaped by many genes with tiny effects, alongside numerous environmental influences, rather than by single genes such as the once-hyped MAOA "warrior gene".
Will we soon be able to predict a child's future personality from their genetic code at birth?
If personality is written in our genes, can our DNA become a valid defense in a court of law?
Can we truly alter our inherited personality traits like anxiety through lifestyle and therapy?
Decoding Personality: How Genetic Meta-Traits and Prefrontal Cortex Architecture Shape Mental Health Vulnerability
Overview
A groundbreaking 2026 study revealed two core genetic meta-traits—stability and plasticity—that shape personality and mental health. Stability, linked to 81 genetic loci and key genes like NTRK2 and BDNF, offers strong protection against mental illnesses such as depression and anxiety. In contrast, plasticity shows a more complex relationship with psychopathology. Shared genetic factors also connect brain structure to personality traits, influencing features like cortical thickness and surface area in regions critical for emotion and cognition. Additionally, mutations in genes like GRIN2A disrupt brain signaling and energy production, contributing to disorders like schizophrenia. Advances in large multimodal models now enable precise identification of mental illness subtypes, leading to targeted treatments with promising remission rates.