> several factors appear to increase the risk of developing a cluster b personality disorder, including: > genetics: research suggests that family history and certain genetic variations may contribute to the risk of developing a cluster b personality disorder. people with at least one immediate family member with hpd, npd, bpd, or aspd are significantly more likely to meet the diagnostic criteria for the same disorder. > brain structure: research suggests that differences in brain structure and chemistry may play a role in the development and severity of cluster b personality disorders. for example, many people with aspd have impaired function in the prefrontal cortexan area of the brain involved in complex thinking and decision-making.
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