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The Biological Perspective of Aggression


Ash O'Brien

on 15 August 2011

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Transcript of The Biological Perspective of Aggression

The biological perspective of Aggression The biological perspective of aggression looks at the physical characteristics that may influence a person into giving an aggressive response to a certain situation. The main focus for this perspective is the hereditary influence,the brain's influence and the influence of chemicals. Genetics Neural Biochemical One part of the biological perspective is that of
the influence of the genetic makeup an individual
inherits from their parents. It is believed that certain
people carry a gene for aggression that they can pass
on to their offspring.This theory was tested in 1979 by a
Finnish psychologist Kristi Lagerspetz. He gathered a
Large population of mice and bred thoses that had signs
of aggression together. The offspring of these "aggressive"
mice showed extreme aggression to the point where they
attacked any mouse placed into their cage. During this
experiment he also bred the placcid mice together and
their offspring after a number of generations displayed
no sign of aggression even when attacked they didn't
attempt to protect themselves. It is believed that their is not one particular area of the
brain is devoted to the aggressive functions but a collection
of different parts. The two main areas are the hypothalamus
and the amygdala in both humans and other animals. This
was discovered when a patient who was suffering a mental
disorder had an electrode placed on her amygdala by a
neurosurgeon when this elctrode become active the usually
gentle woman become abnormally aggressive toward the
neurosurgeon. Another part of the brain that is involved in
aggression is the cerebral cortex which is used to interpret
the behaviours of others. If there is a misinterpretation of
a gesture it may result in the person giving an aggressive
reaction. The chemicals that are present in the body can
alter the way people behave. Some of these
chemicals can be naturally occuring such as hormones.
Other chemicals
can be introduced to the body like alcohol and other drugs.
The high presence of the hormone testosterone has been linked
to increase acts of aggression and is the reason why men are more aggressive the females. An experiment has been conducted with castrated mice and injections of testosterone. The presence of certain drugs can result in a person becoming dishibited which causes them to become more likely to have an aggressive reaction to others behaviours.
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