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Aggression -
Role of neural and hormonal influences:
Biological explanations view aggression as having internal physiological
causes rather than external social or environmental ones. Research has
concentrated on several biological areas, including genetics, hormones,
neurotransmitters and brain structures themselves. Biological factors can be
perceived as sole causes of aggression or…

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serotonin levels affect a continuum of aggressive behaviour from
violent through to placid.

Evaluation:

Various drugs, approved by clinicians, have been associated with
reducing serotonin and increasing aggressive behaviour. Penttinen
(1995) reported that cholesterol-lowering drugs and appetite suppressors
produce such effects. Some drugs have been withdrawn from medical
practice because…

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Bermond et al (1982) found that testosterone only affects certain
types of aggression in animals, such as inter-male aggression as a
defensive response to intruders, while predatory aggression is not
affected.
Albert et al (1993) found that raising testosterone levels in female rats
elicited aggressive behaviour in the presence of…

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