Mental Help Net
Personality Disorders
Basic Information
What is a Personality Disorder?Diagnosis of Personality DisordersCauses of Personality DisordersTreatment of Personality DisordersPersonality Disorders Summary and ConclusionPersonality Disorders References and Resources
More InformationLatest NewsQuestions and AnswersBlog EntriesVideosLinksBook Reviews
Therapist Search
Find a Therapist:
 (USA/CAN only)

Use our Advanced Search to locate a therapist outside of North America.

Related Topics

Mental Disorders

Simone Hoermann, Ph.D.Simone Hoermann, Ph.D.
A blog about the personality disorders (borderline, narcissistic, etc.) with a focus on research and therapy

Psychopathy And The Brain

Simone Hoermann, Ph.D. Updated: Mar 8th 2010


young woman peeking though blinds of a windowI like to listen to audiobooks on my commute.  The most recent book I listened to was “The Sociopath Next Door” by Psychologist Martha Stout.  The book came out in 2005, and although one might consider it slightly dated by now, it gives a vivid description of the problem of sociopathy.  Of note, while some experts distinguish between sociopathy and psychopathy, Stout does not seem to make that distinction in her book.  For the sake of keeping things simple, I will mostly stick to the term psychopathy for now, since most of the current research on the topic uses that term.

Most people think of psychopaths as the character of Hannibal Lector in Silence Of The Lambs, or they think of someone like Jack The Ripper or Batman’s Joker - sadistic, violent, creepy, and quite a bit larger than life.  In contrast, real-life psychopaths can be much more inconspicuous—charming, convincing, and seductive, they manage to influence and exploit others to get their way.  The sociopaths Stout is talking about do not only include serial killers or mass murderers, or high-powered psychopaths that became politicians or high-level executives, but they include those “average” people that get pleasure out of exerting whatever power they can.

Amongst the key features of psychopaths are a lack of empathy and a lack of conscience. That means they don’t feel empathy for others and don’t experience remorse when they harm or hurt others.  In her book, Martha Stout gives ample examples for this lack of remorse and empathy, for instance, the highly-functioning executive who sexually harasses his assistant. When she tries to fight him off, he breaks her arm. Instead of remorse, the psychopath responds by claiming the assistant broke her own arm, because she fought back.  This characteristic of a lack of remorse is something that is very difficult to grasp for people who do have a conscience, and I think this can make it hard to identify psychopaths. It is the charming, nice, glib, and seductive exterior that can make it difficult to realize when you are dealing with a psychopath.

In listening to the Sociopath Next Door, I was reminded of the 2008 paper by researchers Abigail Marsh and James Blair who reviewed several studies that investigated  psychopathy in relation to the ability to recognize the affect expressed in other people’s faces.  People with psychopathic characteristics did not show any consistent deficits in recognizing the expression of happiness, anger, or disgust in the facial expressions of others.  However, interestingly, they had significant deficits in recognizing fear in other people.  The authors concluded that it is not that people with psychopathic traits have difficulty reading other people’s facial expressions in general, but there’s something that’s related specifically to identifying the affect of fear in others.  Since there is some evidence that the function of recognizing fear-expression is located predominantly in an area in the brain called the amygdala, Marsh and Blair concluded that there must be some deficits in psychopaths that have to do with neurocognitive functions in that area of the brain.  This hypothesis receives further support through a 2009 brain imaging study by Yaling Yang and colleagues that demonstrated that the amygdala of people with psychopathy had reduced volume compared to a non-psychopathic control group.

It’s quite fascinating what our modern technology of brain imaging and our modern research methods enable us to do.  However, even though there is some indication that there may be some identifiable deficits in the brain that are related to psychopathy, much is still unknown and mysterious about it.  We still know little about the mechanisms of how a psychopathic personality develops, and what can be done in order to offer effective methods of prevention and treatment.  And this is what ultimately will help to reduce the harm done by the sociopath next door.


Simone Hoermann, Ph.D.Simone Hoermann, Ph.D., is a Psychologist in private practice in New York City. She specializes in providing psychotherapy for Personality Disorders, Anxiety, and Depression. She is a faculty member of Columbia University, and facilitates psychotherapy and skills training groups at the Columbia East 60th Street Day Treatment Program.

Reader Comments
Discuss this issue below or in our forums.

off the jock. - - Dec 3rd 2010

For one, I think we need to be careful, for the sake of our own development, to leave definitive diagnosis to professionals, or at least use professional reference material if we're going to make conclusions about a person. If I had a dollar for every dude who said he broke up with a girl because "she got psycho" on me, I'd probably be the successful author of a pop psychology book. It takes some objectivity with ourselves (is that mentally possible?) to ask, for example, "is her wanting to know why I got home so late last night and being upset about it a symptom of pathological manipulativeness?" or concluding "when I broke up with her, she called me, like 10 times. First she was crying, then she was yelling, then she even threatened me. Damn, what a psycho." 

Sociopathic boyfriend - - Mar 30th 2010

I am currently dating a man who just got out of the marine corp after being a sniper for four years in Iraq. He is handsome, strong, charming and intelligent. I would have never realized that he had sociopathic tendencies unless a friend mentioned to me that something was off about him. He is a spiritual man with good values...or so I thought. The best advice I could give anyone is to listen to everything that people say to you. Don't brush off jokes or random comments. The secret thoughts that sociopaths have are not hidden from us 100% of the time. YOU CAN FIND OUT IF YOUR BOYFRIEND IS A SOCIOPATH.

For example: One day we were talking about life and God. I am not a religious person, so I was doing the majority of listening. He told me that the only reason he does not harm others is because there is a God. He told me that if there was no God, he would pick out couples to torture. Specifically women who were with abusive men. He wanted to give the couple a chance to walk away free if the male could win in a fight over him. If not, he would rape and torture the woman infront of him.  "WHAT?!" I said. His response was, "oh I was just joking. I wanted to get a rise out of you."


Always trust your instincts. They may save your life.  

sociopathic v psychopath - allison - Mar 11th 2010

When I was an undergrad my professor for Ab Psych explained the difference between psychopathic and sociopathic is a psychopath is someone with the inability to decipher right and wrong and a sociopath can differentiate, however lacks the skills to care.

Any thoughts on that hypothesis?


girlfriend is a sociopath - Carlos - Mar 10th 2010

I had a girlfriend that is a sociopath.  It took me a little while to decipher her personality.  She never showed any remorse for the bad things she did, and she used to get very angry when things did not go her way.  When we finally broke up, she got so mad not because she was losing me, but because she could not keep manipulating me.  Dr. Simone is right :(  These traits can be hidden behing smiling faces, charming and charicsmatic personalities, and like in my case, in a sexy and beautiful girl. 

Follow us on Twitter!

Find us on Facebook!

This website is certified by Health On the Net Foundation. Click to verify.This site complies with the HONcode standard for trustworthy health information:
verify here.

Powered by CenterSite.Net