PSYCO104 Lecture Notes - Lecture 12: Nucleus Accumbens, Dachshund, Australopithecus
15 Feb 2019
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Document Summary
Epigenetics: study of effect of external or environmental factors on genetic expression, rats with chronic exposure to cocaine produce changes gene products in nucleus accumbens (area associated with reward network). Evolution: change over time in the frequency of particular genes occurring within an interbreeding population, charles darwin"s hypothesis of natural selection (1859) continues to influence. Psychology in that certain tendencies have an adaptive value: attractive people tend to be treated better in society and increase their chances of reproduction, so there is value in lookin" gooooood. Adaptation: the protracted development sees brain size increasing from around 450 650 cc to 1450 cc (australopithecus to neanderthalensis, this also required enlarged skull casing. In contrast to brain and skills size, jaw and teeth sizes decrease. **unknown*: this evolutionary personality theory is, perhaps, a little too flexible. If parental involvement is low, and there is competition for a mate, sexual dimorphism dictates increases in size and strength.
