--Original published at Kate's College Blog
For this week’s first impression post, I chose to watch “Exploring the mind of a killer” with Jim Fallon. I chose to watch this talk because I watch shows that solve crime and murder cases. Seeing the behind the scenes of how the brain works in psychopaths and killers made it interesting to watch.
In this talk given by Jim Fallon, a neurologist and professor at University of California, he discusses the genetic analysis and brain scans that can show the brain structure of murderers. He performed blind experiments with normal brains and brains of psychopaths. He looked at the interaction of genes, brain damage, and the persons interaction with the environment at a certain timing in the persons life. The precise timing that the damage happens causes different psychopaths. All of the psychopaths that he looked at had damage in their orbital cortex and their interior part of their temporal lobe. He also found that the MAO-A gene plays a role in psychopathic killers. The major violence gene, MAO-A, is a sex-linked gene on the X chromosome. This also explains why more men are known to be psychopathic killers and aggressive because they only have one X chromosome while females have two. Another factor he discusses is having too much brain serotonin during development because of the MAO-A gene. Serotonin is supposed to make you calm, but during development if the brain has too much serotonin, it becomes insensitive to it and so it does not work later in life. In order to express this gene in a violent way, the person must have experienced a traumatic event early in life, before puberty. He then talks about his own family tree. on his fathers side, he discovered matricide and seven more men that were murderers. He started to do PET scans, EEG’s, and genetic analysis of everybody in his family. He found that siblings, a son and daughter, did not get along and they had the same scans, and now they are very close.
What I found to be interesting in this talk was the influence of the MAO-A gene. It was intriguing to see how the effects of this gene can cause someone to become violent or aggressive. It also connected the dots of why more psychopathic killers tend to be males because it is a sex linked gene on the X chromosome.
I found the presenter, Jim Fallon, to be trustworthy. He was a neurologist and a professor at the University of California. He had an extensive background of knowledge in behavior and the way the brain works and performed many experiments with reliable conclusions with evidence to back up his findings.
For my research, I would perform a longitudinal research experiment. I would randomly assign an equal amount of boys and girls from a third world country that is battling socioeconomic distress. I would follow the same group of individuals over time from in their mother womb to after puberty. I would see if during development the brain received too much serotonin than the normal rates. I would then follow them through their childhood and see if their MAO-A gene would be influenced by their traumatic childhood experience that would cause the gene to be expressed in a violent way. To draw conclusions, I would have to see if the child is influenced by both of these factors of serotonin and their MAO-A gene and follow them through after puberty to see if their behavior and brain scans have the patterns of a psychopathic killer.