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Brunner syndrome is a rare genetic disorder associated with a mutation in the MAOA gene. It is characterized by lower than average IQ (typically about 85), problematic impulsive behavior (such as pyromania, hypersexuality and violence), sleep disorders and mood swings. [1] [2] It was identified in fourteen males from one family in 1993.
A dysfunctional MAOA gene has been correlated with increased aggression levels in mice, [60] [61] and has been correlated with heightened levels of aggression in humans. [62] In mice, a dysfunctional MAOA gene is created through insertional mutagenesis (called 'Tg8'). [60] Tg8 is a transgenic mouse strain that lacks functional MAO-A enzymatic ...
Reciprocal determinism is the theory set forth by psychologist Albert Bandura which states that a person's behavior both influences and is influenced by personal factors and the social environment. Bandura accepts the possibility that an individual's behavior may be conditioned through the use of consequences.
A variant of the gene that encodes the neurotransmitter metabolizing enzyme monoamine oxidase-A (MAOA), which relates to neural systems involved in aggression, plays a key role in regulating behavior following threatening events. Brain imaging studies show patterns of arousal in areas of the brain that are associated with aggression in response ...
The field of psychology has been greatly influenced by the study of genetics. [1] Decades of research have demonstrated that both genetic and environmental factors play a role in a variety of behaviors in humans and animals (e.g. Grigorenko & Sternberg, 2003).
A possible link between predisposition to novelty seeking and a genotype of the MAO-A gene has been found. [58] A particular variant (or genotype), dubbed "warrior gene" in the popular press, was over-represented in Māori. This supported earlier studies finding different proportions of variants in different ethnic groups.
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Stephen Anthony Mobley (July 13, 1965 – March 1, 2005) was a convicted murderer executed by the State of Georgia for the 1991 killing of John C. Collins, a 25-year-old college student working nights as a Domino's pizza store manager. [1]