DRAGONFLY KINGDOM NTERNATIONAL SERVICE AGENCY

Researchers have found that people with narcissistic personality disorder have less gray matter in the left anterior insula, a region of the brain linked to empathy.

Narcissistic personality disorder is a mental disorder in which the sufferers have an inflated sense of their own importance and a lack of empathy. They generally suffer from low self-esteem and feelings of inferiority, but have displays of arrogance and vanity......

full article at https://psychcentral.com/news/2013/07/06/narcissists-lack-of-empathy-tied-to-less-gray-matter#1