The MAOA Gene

Advances in technology within the fields of medicine and biology have allowed researchers to investigate deepen into why humans behave the way they do. The issue that is of interest these days is the study of the “Warrior Gene.” There is debate on whether or not the Warrior Gene has an influence on an individual’s behavior and if it can be used to determine if someone will commit criminal acts. On one side you have those that claim the warrior gene can be related to aggressive and violent behavior. “In fact, humans with a low-activity form of the MAOA (Monoamine Oxidase A, or the warrior gene) gene are much more prevalent in groups with a history of warfare” (Hickey 49). The opposition claims “nature and nurture are inexplicably linked and that there is always an environmental component to human behavior” (Hickey 49). The question is, does a warrior gene make people more prone to violence? I will summarize the yes and no sides of the argument while also providing my own opinion on the

According to studies led by King’s College researchers, it has been confirmed that “psychopathy is a distinct subgroup of antisocial personality disorder (ASPD)” (Gregory et. al n.p) and similarly to psychopathy, the more severe ASPD behavioral patterns are, the symptoms can be referred to as sociopathic or psychopathic. Furthermore, according to Nigel Blackwood, Ma, MD.MRCPsych, “MRI scans...found that psychopaths had structural brain abnormalities in key areas of their ‘social brains’” (Gregory et. al n.p). The areas of the brain, in which are deficient in psychopaths, are important when comprehending an individual emotions’, intentions, and moral

Another example Karoliszyn uses in his article on predictive policing is the idea that genetic makeup could potentially be a cause of violent behavior. He states, “In years to come, many legal experts speculate, brain scans and DNA analysis could help to identify potential criminals at the young age of three.” The warrior gene is one of the things that scientist are looking for in these DNA tests and brain scans. This gene codes for the monoamine oxidase enzyme (MAOA). In “The Warrior Gene: Epigenetic Considerations,” it talks about the actions of those with the warrior gene. “Antisocial and violent behavior may or may not be associated with psychological measures that indicate an underlying personality disorder,” states the author of “The Warrior Gene: Epigenetic

Martens, W. H. (2000). Antisocial and psychopathic Personality Disorders: Causes, Course, and Remission- A Review Artical. International Journal of Offender Therapy and Comparative Criminolgy , 44(4), 406-430.

Psychopathy, in both the mental health and criminal justice systems, has emerged as one of the most important clinical constructs of the 21st century (Hare, Clark, Grann, & Thornton, 2000, p. 623). Where clinically, psychopathy is traditionally described as a combination of inferred socially deviant behaviors and personality traits. Some traits and behaviors a psychopath is seen to possess are commonly known, for example, to being impulsive, selfish, aggressive, lacking remorse, shame, feeling for others, pathologically lying, and having asocial or antisocial behaviors (Hare, & Neumann, 2006, p. 59-60). One of the reasons as to why psychopathy has come to see an increase in the development of its theoretical and applied interest is the

In fact,because psychopaths are not able to feel empathy involuntarily, they are able to turn the feeling on. It is very common for psychopaths to have “ a false belief in their own superiority, a sense of entitlement and a complete disregard for social norms” (Paula, year). Psychopathy had recently been changed into ‘antisocial personality disorder’ in the updated version of the FBI’s mental health book, DSM-III. It was changed for the reason of the personality not always being reliable, as well as psychopathy symptoms crossing over antisocial personality disorder symptoms. Another reason for the change was because it is believed that focusing on behavior instead of the why helped identify the disorder easier. The new research was highly and widely discussed among many physicians because some felt unsure of the change, but they were also for the change with consideration of the evidence that was found. The usual psychopath is not found to be violent. If they are violent, they are considered more dangerous than others and will most likely reoffend sooner and worse than the first time. Between psychopaths and non psychopaths, psychopaths have a longer criminal history which varies in crimes. Their patterns are unique when compared to a non psychopath, but due to their inability to have emotion, they are able to be more observant on their next chosen

Unfortunately, changing the biological composition of their brain is not as easily achieved. Studies have found multiple areas of interest when studying the brain structures in psychopaths. These minor differences provide a world of knowledge into what composes a psychopath. Since each area of the brain serves a specific function, determining the effects of abnormalities correlates to the area of interest. Due to the major costs associated with many tests, they are not performed unless indicated. Brain imaging research on psychopathy: Implications for punishment, prediction, and treatment in youth and adults provides us with the very new research that has been conducted on both adult psychopaths, and juveniles that display callous unemotional traits (CU) and have disruptive behavior disorder (DBD) (Umbach et al., 2015). Research done has not given conclusive results that fits for each and every psychopath, but an area of commonality is the amygdala. “In addition to their finding of significant bilateral volume reductions in psychopaths, Yang et al. (2009) identified localized surface deformations in four of the 13 nuclei: the basolateral, lateral, cortical, and central nuclei.” (Umbach et al., 2015, p.296). The paralimbic structure is seen as the emotion processing center of the brain, controlling all emotions including empathy and conditioned fear

Introduction The purpose of this study is to compare and contrast the constructs of psychopathy and antisocial personality disorder. The aim is to highlight whether the terms psychopathy and antisocial personality disorder reflect the same construct or whether they differ. Furthermore, recommendations for treatment of criminal behavior will be explored. For the purposes of this evaluation some definitions need to be highlighted: Criminal offence is an act that breaks a law, which relates how to behave in society. The harm caused by the act is seen to be against society as a whole, not just a specific person. Sometimes it refers to the specific law that was broken (Herring, 2009). Crime is the breach of rules or law for which some authority

The concept of psychopathy originated in the 1800s to describe individuals that consistently failed to conform to societal norms and exhibited antisocial behavior that did not fit the concept of mental illness of the time period. While, psychopathy was a common term used to describe individuals suffering from this disorder other descriptions were coined such as “Pinel’s term “manie sans delvie” meaning mania without delirium in the 1700s, to describe patents whose ‘affective faculties were disordered’” or Pritchard’s term “moral insanity” (Ogloff 520). In the 1930’s Partridge argued that psychopathy was a social rather than a mental disorder and proposed that the concept of sociopathy be introduced as a more accurate description. The American Psychological Association adopted Partridge’s term for their Diagnostic and Statistical Manuel in 1952. However, in 1968 the American Psychological Association changed the diagnostic label from sociopath to “personality disorder, antisocial” for the Diagnostic and Statistical Manuel – II that continued through to the DSM - III in 1980 and the DSM - III-R in 1987 and the DSM - IV in 1994. Today the Diagnostic and Statistical Manuel categorizes antisocial personality disorder as a personality disorder and it is named as such. Unfortunately, not much research has been conducted

The researchers, based at King's College London's Institute of Psychiatry, said the differences in psychopaths' brains mark them out even from other violent criminals with anti-social personality disorders (ASPD), and from healthy non-offenders. The study showed that psychopaths, who are characterised by a lack of empathy, had less grey matter in the areas of the brain important for understanding other people's emotions.

Of all the psychiatric disorders, none are more chilling to the world then the psychopaths and sociopaths. These two disorders, categorized as antisocial personality disorders, bring about the absolute worse people and killers that the world has ever known. The infamous serial killers, the people who do the unimaginable, were all psychopaths. The ability of these people to do what they do and know that what they are doing is wrong, is perhaps one of the most chilling and shocking characteristic of these people. Psychopaths and sociopaths are very often thought by most to be the same disorder, yet they are different when classified by many psychiatric researchers. The people classified as psychopaths and sociopaths are separated by one main difference, and that is if they were born with a lack of the ability to empathize or if they were affected as children in a traumatic environment. Although both of these horrible disorders derive from a different area, the reality is that they are unpredictable, undetectable and most importantly, they can be very dangerous.

Some believe that evil is learned over time, however, many experiments have proven that there are genes and instincts that influence how a person reacts in violence situations. For example: “ … MAO-A gene--- also known as the warrior gene because it has been associated with violence” (Text 4). The gene, MAO-A, was tested and found in people who have committed wicked acts and sentenced to jail. This shows that genetics can alter the daily lives of many civilians and how genetics can affect the violence in a person. A television show conducted an experiment with babies to test their natural sense of morality; the results suggest “that we’re not taught to hate, we’re born to hate” (Text 2). This proves that humans are born evil and after being

Due to its primary role in processing memory and emotional reactions, over the last decade and a half psychologists have been linking the amygdala to psychopathy. It is involved in aversive conditioning and instrumental learning and is thus involved in all the processes that, when impaired, produce the same functional impairments displayed by psychopaths. Two famous studies conducted by Tiihonen and Kiehl respectively have confirmed this. Tiihonen used a volumetric MRI to test and confirm the positive correlation between low amygdaloid volume and a high degree of psychopathy in violent criminals (measured by the Hare checklist-revised) while Kiehl used a functional MRI to prove reduced amygdala response during an emotional memory task in individuals who scored high on the Hare checklist-revised. However, both these studies along with numerous others were conducted using violent offenders as subjects rather than individuals with psychopathy. Although many psychopaths do exhibit violent tendencies, not all violent offenders are necessarily psychopaths. A study conducted by Raine is one of the few that did focus only on individuals exhibiting psychopathy. In his study Raine was able to show reduced prefrontal grey matter in his test subjects. Unfortunately though, he was unable to differentiate between grey matter in different regions of the prefrontal cortex. It is however clear that there is one region of the frontal cortex that could be

It is very rare these days to turn on the news and not hear about a crime or a murder. Crime is a common occurrence yet many times it is difficult to understand how someone could bring themselves to do these things. It does seem to make any sense why a young handsome man from a good family would want to kill someone and then be able to go through with it. This leads one to wonder if the brains of people who behave in socially unacceptable ways are different from everyone else's brains. There is a substantial amount of evidence that suggests some criminals do have differences in their brains that most likely contribute to their behavior. Many of these individuals have Antisocial Personality Disorder and

They would not be considered at fault because it is in their genetic makeup that they are aggressive and want to hurt others. The MAOA gene is a metabolic enzyme, which means that it stops the work of the neurotransmitters, dopamine, norepinephrine, and serotonin, causing problems within the enzyme that are associated with aggression (Wolfson, par 10). These problems within the enzyme were made apparent through maltreatment of children. The primary maltreatment that Caspi and Moffitt studied was when a child was a victim of physical and sexual abuse (Tabery 2). What was found in their study was people with low-MAOA activity drastically increase the risk of having an antisocial personality disorder, while people with high-MAOA only gradually develop the risk (Tabury 3). Having an antisocial personality disorder be in your genetic makeup would not make the person having it at fault. If it was in ones genetic makeup, then it would not be possible to actually convict someone in court and they would have to be considered not medically sane. The MAOA gene is found in everybody’s X chromosome, so while women have two copies of the X chromosome, men only have one so it’s more common that men will have more problems with MAOA gene (Wolfson, par. 10). However, even though everyone has this gene, it does not cause a problem for most people. Through the Caspi-Moffitt study it was shown that the MAOA gene, while being there does not actually affect the brain