PSYCO241 Lecture Notes - Lecture 85: Twin, Relational Aggression, Twin Study
2 Apr 2019
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Document Summary
Behavioural genetics basis for aggression (e. g. coccaro et al. , 1997; miles & carey, 1997; Research confirms physiological mechanisms involved in the detection of social threat, the experience of anger, and engaging in aggressive behavior. Brain regions: dorsal anterior cingulate cortex (dacc): detection of social threat; unjustified wrongdoings, hypothalamus and amygdala: anger and fear. This brain area is active when people detect actions and outcomes that interfere with their goals, including social threats. The hypothalamus and the amygdala are two brain regions that play a key role in people"s emotional experiences of fear and anger and prepare them for a fight-or-flight response. The dorsolateral prefrontal cortex and medial prefrontal cortex help regulate impulses, share connections with the limbic system, and contain serotonin receptors. Sex hormone: development of primary and secondary male sex characteristics. About ~10 times higher concentration in men. Link with aggression is complex: mostly a positive relationship, however. Role in control and inhibition of aggression and sexuality.
