Student ID number: 1704918
Does dysfunction of the prefrontal cortex lead to antisocial behaviour?
Word count: 984 Antisocial behaviour (ASB) broadly encompasses human character traits and behaviours that are generally viewed as unpleasant or immoral, such as reduced empathy, aggression and violence. Consequently, ASB is unconducive to forming healthy interpersonal relationships and functional living and on a large scale is socio-economically detrimental to societies. Therefore, research into ASB’s aetiology is important for potentially informing its prevention and management and in turn reducing its negative outcomes. This essay investigates the possible causal role of prefrontal cortex (PFC) dysfunction and structural abnormalities in ASB, focusing on specific PFC subregions; as well as the roles of other brain regions, genetics and the environment. It argues that there is significant evidence that the dysfunction of several brain regions, including the PFC and areas of other lobes, can lead to ASB. The underlying reason(s) for the dysfunction may be brain damage and/or genetic and environmental influences.
The PFC, the rostralmost region of the frontal lobe, as part of neural circuits that include other cortical and subcortical regions, is widely regarded as the neural substrate for many executive functions (EFs), at least some of which are impaired in ASB. EFs include working memory, planning, decision-making and inhibition (Eslinger,
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
This article tries to sum up the causes of Antisocial Personality Disorder. Though, researchers have not found an exact cause of Antisocial Personality Disorder (Martens, 2000). Antisocial Personality Disorder is known to be directed toward specific behaviors and criminal act instead of looking at personality traits and psychopathological aspects (Martens, 2000). People that develop Antisocial Personality Disorder are more likely to suffer from substance abuse disorder, anxiety, depression, and schizophrenia (Martens, 2000). Researchers have done different studies especially with brain injuries, which could trigger
Modern biology is focused more on understanding behavior, like violence and crime, through research on indicators and influences. Rather than attempting to determine a single root cause, researchers are discovering markers of predisposition and identifying factors of risk. In a recent interview about his new book, The Anatomy of Violence: The Biological Roots of Crime, criminologist and professor at the University of Pennsylvania, Adrian Raine asserts that there is a “biology of violence” that should not be ignored; “Just as there’s a biological basis for schizophrenia and anxiety disorders and depression… there’s a biological basis also to recidivistic violent offending” (Gross, 2013).
However, more recently, a study led by King’s College London has claimed that there are differences between the brains of psychopaths and other criminal offenders diagnosed with antisocial personality disorder. Dr. Nigel Blackwood who led the research is quoted as saying “We describe those without psychopathy as 'hot-headed' and those with psychopathy as ‘cold-hearted’.” This statement shows a clear distinction between what should be interpreted as a lack of self-control and ability to repress impulses and what should be diagnosed as psychopathy. The study took MRI scans of 66 men, two thirds of which were offenders who had been diagnosed with antisocial personality whilst the other third were non-offenders considered to not have any personality disorders. Of the 44 offenders, 17 met the diagnosis criteria for psychopathy (ASPD+P) assessed by the guidelines stated in the DSM-IV. Researchers saw that the members of the study diagnosed as psychopaths had notably less grey matter in areas associated with moral behaviour and understanding other peoples’
Masculinity is an odd concept, because in many ways it is representative of strength and power. However, it is also represented through pop culture, literature, media, etc. as being rather fragile. In feminist literature, we see this fragility come through at incredible rates. While simply looking at a couple of novels, it is possible to evaluate how the power dynamic of masculinity puts up its walls when facing the smallest threats to its power. Through analysis of Jeanette Winterson’s Oranges Are Not the Only Fruit and Jean Rhys’s Wide Sargasso Sea, it is possible to see how the figureheads of masculinity panic as soon as they are posed with the smallest threat. The protagonists of both stories are categorized as “mad” or “abnormal” throughout the course of each respective plot. They are placed there under the pretenses that this classification is what is best for them because it allows them to get the help they need and deserve in order to get better. However, these declarations of madness are really born from the infringement of both characters upon the pre-established patterns of masculinity and the panic that ensues from the male voice as a result of this deviance from traditional norms.
In Sarah Churchwells, “Why the Humanities Matter”, she emphasizes on the importance that the humanities is what makes us human. To broaden our understanding of the humanities, Sarah encourages improvement of our communication skills and to expand our knowledge of other societies. After, she warns the audience about the dangers of losing the humanities due to the opinions of politicians and corporations who claim that people are merely workers and consumers rather than citizens or individuals. Churchwells furthers her argument by stating examples of humanities protecting human existence beyond industry. She then states that falling into the trap of politicians and corporations; become consumers rather than citizens, we destroy thousands of years
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
Antisocial Personality Disorder is a very rare disorder. The criteria to be diagnosed with Antisocial Personality Disorder has been changed in the Diagnostic and Statistical Manual of Mental Disorders throughout many years. The rareness of this disorder can be considered beneficial in the world because of the way people diagnosed with it become and what they do to others. Many people diagnosed with antisocial personality disorder find their self in prison. A variety of causes pertain to this disorder. Very few treatments of this disorder seem to work of this that has been tested. Researchers are still working on a better way to treat this disorder. The defense mechanisms associated with antisocial personality disorder are quite common and the same during the course of diagnosis.
To be considered antisocial is to isolate oneself from general social conditions and demonstrate behaviors that deviate from the social societal norm. Antisocial Personality disorder describes an individual that lacks values and habitually violates societal standards in regards to ethics and social behavior. Individuals with this disorder can be described to lack empathy, act impulsively, and have flagrant disregard for other people. It is hard for them to form engage in positive social exchanges or maintain relationships with others. It was only until the early twentieth century that Antisocial Personality disorder was named. Previously, these individuals were categorized as psychopaths due to the thrill-seeking and cunning nature of their actions. Psychopaths have the ability to change their personalities to ultimately get what they desire then revert back to a malicious, egocentric state. When faced with a dangerous adventure, for those with ASPD the choice will always be to peruse the danger. This is due to a constant underlying feeling of restlessness (Nolen-Hoeksema, 2011, p. 272). Although these traits can be deemed “psychopathic” this disorder is not only seen in those who have established themselves as violent criminals, but in those who have established as high-ranking members in society. How can this disorder differentiate itself so starkly within people? Although there are no direct medical test to diagnose this disorder,
Furthermore, psychopathy was considered during the twentieth century, the most widely used term to describe antisocial behavior (Reed, 1996). In the 1980s, the committee who devised the Diagnostic and Statistical Manual for the American Psychiatric Association recommended the term antisocial personality syndrome to be changed to antisocial personality disorder (Ellis & Walsh, 2000). Antisocial Personality Disorder Hare & McPherson (1984), were successful in pushing the idea that there is a significant correspondence between violent and persistent delinquent and criminal histories and antisocial personality disorder diagnosis. Acute persistent child conduct disorder behavior symptoms, also known as conduct disorder, have been directly linked to serious criminality and antisocial personality disorder (Ellis & Walsh, 2000). Although criminality and antisocial personality disorder ought not be equated, they should be seen as closely linked behavioral phenomena (Ellis & Walsh, 2000). Vitella (1996) believes that individuals with childhood conduct disorder have a higher than normal probability of being both criminal and diagnosed antisocial personality disorder in adolescence and adulthood, and persons with serious criminal records have a higher probability of being diagnosed psychopathic than those with little or no criminal history. Nevertheless, Ellis & Walsh (2000) in caution pointed out that these
In order to understand why people act in antisocial ways, one needs to pinpoint which area of the brain controls social behavior. The prefrontal cortex has been thought to have something to do with control of social behavior ever since Phineas Gage's famous accident in 1848 (1). Phineas Gage was a
Antisocial personality disorder (ASPD), opposition defiant disorder (ODD), and conduct disorder (CD) are three distinct disorders based upon their respective diagnostic criteria in the DSM-5. If ODD and CD were mild forms of ASPD, then there would need to be causal relationship between the childhood manifestations of ODD and CD and the adult manifestation of ASPD. There is evidence of comorbidity between ODD and CD, and also evidence to suggest that children diagnosed with these disorders may go on to develop ASPD later in life; however, correlation does not equal causation. The three disorders have subtle but important differences in their associated behaviors, underlying causes, treatment outcomes, and neurological signs.
The events of the past can hold a great influence on the actions and behaviors of the future. From being raised in a supportive and loving home, to one that is full of neglect and abuse, each event can potentially impact the future of an individual. In the case of serial killers, there has been some debate on whether the evil ones are made or born; does it happen because of a genetic factor, environmental factor, or is it simply they addicted to the feeling of slaughtering another individual’s life? Although, the most important key in finding the truth deals with the past and shapes the outcome of the future. Upon viewing in a psychological stance, there is no clear understanding of why one aspect that most serial killers share, namely
Cognitive theory also explains the lack of remorse common in people with antisocial personality disorder by hypothesizing that those with the disorder genuinely cannot recognize a point of view other than their own. Based on the views of the biological perspective of psychology, antisocial personality disorder is a result of deficient functioning in the frontal lobe of the brain, explaining the lack of ability to plan ahead, strategize efficiently, experience sympathy, or
One researcher studied a theory relating to sociopaths and their antisocial behavior. This specific study proposed a theory that a primary sociopath is lacking in moral development and does not feel socially responsible for their actions. This type of sociopath is a product of the individual's personality, physiotype, and genotype, which supports the theory that a person’s genotype is the significant factor in the development of criminality. There is a secondary sociopath that develops in response to his or her environment because of how and where they were raised. Living in an urban residence, having a low socioeconomic status, or poor social skills can lead an individual to being unsuccessful in reaching their needs in a socially desirable way, which can turn into antisocial or criminal behavior. This supports the theory that the environment is the significant factor in the development of criminality. With these studies, it shows that both the genetic make-up of an individual as well as the environment play an important role with what kind of person they are going to be as an adult.