It is also responsible for speech, hearing, intelligence and memory. The functions of the two hemispheres are to a great extent different: whereas the left hemisphere is responsible for speech and abstract thinking in most people, the right hemisphere is usually responsible for spatial thinking or imagery.
The right side of the brain controls the left side of the body, and the left side of the brain controls the right side of the body. This means that damage to the left hemisphere due to a stroke, for example, can lead to paralysis on the right side of the body. The left cerebral cortex is responsible for speech and language. The right cerebral cortex supplies spatial information, such as where your foot is at the moment. The thalamus provides the cerebrum with sensory information from the skin, eyes and ears, as well as other information.
The hypothalamus regulates things like hunger, thirst and sleep. Together with the pituitary gland, it also regulates the hormones in your body. The brain stem relays information between the brain, the cerebellum and the spinal cord, as well as controlling eye movements and facial expressions. It also regulates vital functions like breathing, blood pressure and heartbeat. The brain needs a steady flow of enough oxygen, glucose, and other nutrients.
For that reason, it has a particularly good blood supply. Each side of the brain receives blood through three arteries:. In this area, they are connected to each other by smaller blood vessels — forming a structure similar to a traffic circle. The arteries are connected to each other in other areas as well. The hippocampus is another brain area that shows irregular functioning in serial killers Reid, The hippocampus is most commonly known for its role in memory consolidation, yet it also contributes to emotional regulation Reid, Since serial killers have difficulty regulating emotions, it is definitely possible that hippocampal dysfunction may increase the risk of becoming a serial killer.
Another important brain area is the prefrontal cortex, which is responsible for higher-order thinking such as decision-making and planning. This is the last area of the brain to finish developing, which usually takes until a person is around 25 years old. This decreases emotionally processing and awareness of decision-making in serial killers, contributing to their consistent, hurtful actions. Overall, there are many abnormalities in brain structure that may increase the chances of a person becoming a serial killer.
Research has also connected abnormalities in areas such as the corpus callosum and superior temporal gyrus to committing serial murder Raine, This further supports the correlation between brain structure and becoming a serial killer. Harenski, C. Neural correlates of moral and non-moral emotion in female psychopathy. Raine, A. Do you know how to prevent head lice infestations?
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What is even more troubling is when the killer is apprehended, many times he is someone who is well integrated into society. How often have you read about a mass murderer who was a well respected family man who everybody liked, was sociable with his neighbors, well respected at church and work, paid his bills and went to baseball games like the rest of us?
If we can understand more about why serial killers snap and strike out like that, it might be helpful to at least know that there was some reason he became so methodically violent. There is a profile of a serial killer. For example, many serial killers are white males between 25 and 40 who are not married and exhibit signs of bi-polar syndrome.
But it would be a mistake then to begin to categorize every member of society who fits that description as a potential serial killer.
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