Matt Wood, ‘People with anger disorder have decreased connectivity between regions of the brain’,, Science Life (July 6, 2016).

Impulsive aggression

People with intermittent explosive disorder (IED), or impulsive aggression, have a weakened connection between regions of the brain associated with sensory input, language processing and social interaction. (…) It’s not so much how the brain is structured, but the way these regions are connected to each other. (…) People with anger issues tend to misunderstand the intentions of other people in social situations. They think others are being hostile when they are not and make the wrong conclusions about their intentions. They also don’t take in all the data from a social interaction, such as body language or certain words.